JP5653765B2 - Seismic design method and seismic design support device - Google Patents

Description

  The present invention relates to a seismic design method for buildings belonging to the category of standardized buildings such as industrialized houses constructed based on a predetermined standard, and a seismic design support device.

  In conventional seismic design, each individual building is designed so as to satisfy the seismic standards defined in laws and regulations such as the Building Standard Law and the Building Standard Law Enforcement Order. In addition, although it is not a technique related to earthquake-resistant design, an earthquake damage prediction method and an earthquake damage prediction apparatus that can predict a building damage state due to earthquake motion with high accuracy are also known (see Patent Document 1).

JP 2007-93619 A

  Investigating the needs of customers (such as those who plan to purchase homes), there are not only the safety required by the above laws (performance that does not collapse or collapse even if it is severely damaged by a large earthquake), but also requirements related to repairability It has been found. Restorability is a property that can be restored and reused after a major earthquake at a relatively low cost compared to the initial construction cost, and can be said to be property conservation. Restorability is closely related to the degree of damage to the building, but the conventional design method could not be designed taking into account the degree of damage when a given earthquake acts. On the other hand, Patent Document 1 has a description of a method for predicting the damage amount (recovery cost) of a damaged building, but the earthquake-resistant design of setting the earthquake resistance of the building based on the repairability requested by the customer. There is no way of thinking. In particular, since the method described in Patent Document 1 is based on advanced analysis, it is not realistic to design a building that satisfies the customer's requirements by diverting the method described in Patent Document 1.

  It is an object of the present invention to provide a method and a seismic design support device for performing seismic design of buildings belonging to the category of standardized buildings taking into account the degree of damage to the building that is closely related to the repairability of the building. Is.

  In order to solve the above problems, the present invention belongs to a category of standardized buildings constructed based on a predetermined standard, and is a seismic design method for a target building having a desired floor plan. The damage information derivation process for deriving the relationship between the interlaminar deformation angle and the degree of damage in each part, and the earthquake motion index value temporarily determined for the design, A condition setting process for setting a damage tolerance value when an earthquake having an index value acts on the target building, and a temporary setting value of a member arrangement related to earthquake resistance for temporarily determining the target building, and the temporarily determined target building A hypothetical input of a seismic wave having a seismic motion index value to a response analysis process for deriving the relationship between the seismic motion index value and the interlaminar deformation angle in the temporarily determined target building, and an earthquake having a seismic motion index value A damage evaluation value deriving step for deriving a damage evaluation value based on the damage degree when acting on the temporarily determined target building based on each relationship derived in the damage information deriving step and the response analysis step; A comparison process for comparing the damage tolerance value, and if the damage evaluation value exceeds the damage tolerance value in the comparison process, the temporary setting value of the member arrangement is changed and the damage evaluation value is less than the damage tolerance value. Repeat the condition setting process, damage information derivation process, and comparison process until the damage evaluation value falls below the allowable damage value in the comparison process. It is determined as a value.

  In the present invention, in accordance with a request from a customer, an earthquake motion index value and a member relating to earthquake resistance for accepting a damage tolerance value when an earthquake having the earthquake motion index value is applied to the target building and further tentatively determining the target building Accepts a provisional setting value. On the other hand, a damage evaluation value based on the degree of damage when an earthquake having a seismic motion index value acts on a temporarily determined target building is derived based on each relationship derived in the damage information deriving step and the response analyzing step. Then, the damage evaluation value is compared with the damage tolerance value, and the temporary setting value of the member arrangement is appropriately changed until the damage evaluation value of the temporarily determined target building is equal to or less than the damage tolerance value. When the value is less than or equal to the value, the temporary setting value is determined as the setting value of the member arrangement determined for the target building. As a result, the seismic design of the target building is possible in consideration of the damage evaluation value of the building that is closely related to the repairability of the building. Moreover, in the present invention, for example, a building belonging to the category of standardized buildings constructed based on a predetermined standard that prescribes the member to be used and its fit (joint), such as an industrialized house, is targeted. Since the damage degree of the target building is derived based on the damage information of the structural model that belongs to the category and that is actually similar in the behavior and damage state of the constructed member, it is advantageous in that the earthquake-resistant design can be performed easily and accurately.

Furthermore, the damage degree is classified into a plurality of damage modes according to the degree of difficulty required for recovery from damage. In the response analysis process , the inter-layer deformation angle and damage at each part are determined for each of the multiple types of structural models. It is preferable to derive the relationship with each mode. It becomes possible to compare the damage evaluation value and the damage allowable value for each damage mode, and it is easy to meet the customer's request in terms of repairability.

  Furthermore, it is preferable that the degree of difficulty required for recovery from damage is determined based on the amount of cost required for repair. Since damage modes are classified based on the amount of cost required for repair, it is easy to perform an earthquake-resistant design that directly corresponds to the customer's desire for repairability.

  Furthermore, in the response analysis step, it is preferable that a plurality of seismic waves are virtually input and the relationship derived in the response analysis step is obtained probabilistically. Although it is very difficult to accurately predict the impact of actual earthquakes on standardized buildings, by deriving the above relationship probabilistically, with a relatively high degree of accuracy with a certain degree of certainty The above relationship can be derived.

  Further, the present invention belongs to a standardized building category constructed based on a predetermined standard, and is an earthquake-resistant design support device for a target building having a desired floor plan, which belongs to the standardized building category and actually Damage information storage means for storing damage information indicating the relationship between interlaminar deformation angle and damage degree at each part of the built structural model, and earthquake motion index values temporarily determined for design and earthquakes with earthquake motion index values Condition acceptance means for accepting setting inputs of damage tolerance values when acting on the building and provisional setting values of the member arrangement related to earthquake resistance for provisionally determining the target building, and seismic motion index for the provisionally determined target building Virtually input a seismic wave having a value, derive response information indicating the relationship between the temporarily determined seismic motion index value and the interlayer deformation angle in the target building, and an earthquake having the seismic motion index value is temporarily determined The damage evaluation value based on the damage degree when acting on the target building is derived based on the damage information and response information stored in the damage information storage means, and the derived damage evaluation value is compared with the damage allowable value A control unit that executes a comparison process and an output unit that outputs a result of the comparison process executed by the control unit, and the control unit determines that the derived damage evaluation value exceeds a damage allowable value The comparison process based on the provisionally set value of the changed member arrangement received by the condition receiving unit is repeatedly executed until the damage evaluation value is equal to or lower than the damage allowable value, and the damage evaluation value is equal to or lower than the damage allowable value. In the determination, the temporary setting value is output from the output means as the setting value of the member arrangement determined for the target building.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic design of the standardization building which considered the damage degree of the building closely related to the repairability of a building is attained. Moreover, in the present invention, for example, a building belonging to the category of standardized buildings constructed based on a predetermined standard that prescribes the member to be used and its fit (joint), such as an industrialized house, is targeted. Since the damage degree of the target building is derived based on the damage information of the structural model that belongs to the category and that is actually similar in the behavior and damage state of the constructed member, it is advantageous in that the earthquake-resistant design can be performed easily and accurately.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic design of the building which belongs to the category of the standardized building which considered the damage degree of the building closely related to the repairability of a building can be performed.

It is a flowchart which shows the procedure of the earthquake-resistant design method which concerns on embodiment of this invention. It is a flowchart which shows the operation | movement procedure of a proof stress information acquisition process. It is a flowchart which shows the operation | movement procedure of a response analysis process. It is a block diagram which shows the outline of the earthquake-resistant design assistance apparatus which concerns on embodiment of this invention. It is a graph which shows the relationship between the interlayer deformation angle and generation | occurrence | production probability in a 1st damage mode and a 2nd damage mode, (a) shows a damage degree curve, (b) shows a probability density function. It is a graph which shows the response when the earthquake which has a predetermined seismic motion index value acts on an object building, (a) is the figure which plotted the interlayer deformation angle when the earthquake of seismic intensity 7 acted as a random variable, b) is a probability density function indicating the probability of occurrence of the maximum interlayer deformation angle when an earthquake of seismic intensity 7 is applied. It is a graph for deriving the damage probability in the first damage mode, (a) is a graph showing the strength information Ra and response information Sa derived first, and (b) tentatively determines the target building It is a graph which compares and shows the yield strength information Rb and response information Sa after changing the provisional setting value of the member arrangement | positioning regarding earthquake resistance for performing. It is a figure which shows typically the structural model used for the structural experiment which calculates | requires the yield strength of an industrialized house, (a) is a top view, (b) is a front view, (c) is a side view. It is a graph which shows transition of the interlayer deformation angle by a structural experiment.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  As the standardized building constructed based on a predetermined standard, for example, a material (column, beam, etc.) whose material, shape, fit, fixing method, joining method with other members, etc. are defined in advance is appropriately selected. It is an industrialized house constructed by combining these members. In this embodiment, the seismic resistance of an industrialized house with a steel frame construction method that is constructed by appropriately placing a load-bearing panel on a steel frame (column / beam). A design method will be described as an example.

  In addition, the house built based on the standard of this industrialized house constitutes the cross-sectional shape and joint shape of the pillar and beam, the shape of the load-bearing panel, the strength per sheet, and the outer wall, regardless of the floor plan. The outer wall panel material, dimensions, mounting method, interior wall base material configuration, gypsum board fixing method to the base material, window mounting method, and the like are common. Further, columns are arranged at positions that do not affect the floor plan, and beams having different nominal dimensions are appropriately selected and arranged according to the arrangement of the columns. Further, the load-bearing panel is disposed at a position that does not affect the layout (position of the partition wall or the outer peripheral wall without opening). The earthquake resistance is almost determined by the ratio of the number of load-bearing panels to the scale (weight) of the building.

  In the seismic design method according to this embodiment, not only the laws and regulations such as the Building Standards Act are satisfied, but also the seismic design that considers the requirements related to repairability from customers (such as those who plan to purchase housing) can be performed. Is one of the features. Restorability is a property that can be restored and reused after a major earthquake at a relatively low cost compared to the initial construction cost, and can be said to be property conservation. Restorability is closely related to the damage degree of industrialized houses.

  As shown in FIG. 1, when an earthquake-resistant design is performed, a customer request is first acquired after a floor plan is determined in advance by a meeting with a customer. Specifically, the operator (operator) interviews information for selecting the target seismic motion and determining allowable damage from the customer. This hearing is a process for obtaining customer requests for how much damage can be tolerated when a given earthquake (target earthquake) acts on a building as a residence. The needs of people are taken into consideration.

  The selection of the target seismic motion means that the seismic motion index value is temporarily determined for design. The seismic motion index value is intended as a value of an earthquake intensity, that is, a seismic intensity, a maximum acceleration, and the like, and is appropriately determined according to customer requirements.

  In addition, permissible damage (damage tolerance) belongs to the category of industrialized housing, and when the target earthquake acts on a building whose floor plan has been decided to meet the customer's request (hereinafter referred to as “target building”). This is an index value based on the degree of damage. For example, the permissible damage (allowable damage value) is the damage probability when the target earthquake acts on the target building, the amount required for repair from damage (repair amount), the ratio of the repair amount to the initial construction cost, or the repair probability It may be an earthquake damage risk multiplied by the amount of money and the probability of earthquake occurrence.

  The degree of damage is classified into a plurality of damage modes according to the degree of difficulty required for recovery from damage (hereinafter referred to as “repair difficulty”). The difficulty of repair is determined based on, for example, the amount of cost required for repair. In the present embodiment, the repair difficulty is classified into a first damage mode and a second damage mode depending on whether or not the outer wall panel needs to be replaced. Here, the first damage mode is damage to the extent that restoration is completed without requiring replacement of the outer wall panel. For example, damage to the extent that minor cracks have entered the outer wall panel. In the case of the first damage mode, repair work is required because a minor repair work is enough to fill and seal up the sealing material or putty material. The cost is very small. On the other hand, the second damage mode is damage that requires replacement of the outer wall, requires extensive construction involving additional parts and members such as interiors and facilities, and the cost of repair is very high.

  The allowable damage according to the present embodiment is evaluated based on the damage probability, and in order to specify the damage probability, it is necessary to select at least one of a plurality of damage modes (first damage mode and second damage mode). . In the following description, the case where the upper limit value of the damage probability according to the first damage mode is allowable damage will be described as an example.

  When the operator acquires information (customer request information) related to selection of the target seismic motion and determination of allowable damage from the customer, the operator inputs the customer request information to the earthquake-resistant design support device 1 (see step S1).

  Next, the operator temporarily sets the member placement related to earthquake resistance for temporarily determining the target building corresponding to the floor plan requested by the customer, that is, the selection and placement of structural members such as columns, beams, and load-bearing panels. A value is input (see step S2), and a target building for simulation is provisionally determined. The temporary setting value here is, for example, an initial value determined as an initial standard based on the experience of the operator. The operator inputs this temporarily set value to the earthquake-resistant design support device 1. Steps S1 and S2 correspond to a condition setting process.

  The seismic design support device 1 that has received both the customer request information and the provisional setting value of the member arrangement related to the earthquake resistance of the target building is based on the data stored in the strength information storage unit 14 (see FIG. 4). Strength information Ra of a building belonging to the same category as the target building is derived (see step S3).

Data for deriving the proof stress Ra (the proof strength information of the structural model) is derived by a structural experiment using the structural model and a proof stress information acquiring process for performing various information processing. Here, the proof stress information acquisition process will be described with reference to FIG. Note that the proof stress information acquisition process corresponds to a damage information derivation step.
(Proof strength acquisition processing)

  As shown in FIG. 2, in the yield strength information acquisition process, a structural experiment using a structural model is performed in advance (step S11). The structural model belongs to the category of the industrialized house to which the target building belongs, and is intended to be a test body 100 (see FIG. 8) that is a part of the actually built building model.

  As shown in FIG. 8, the test body 100 includes a steel frame and a load-bearing panel, and is configured by attaching an outer wall panel, a floor panel, and the like, and appropriately includes a window 101, a door 102, and an observation doorway. A window 103 and the like are provided. In the interior of the test body 100, the floor is finished with a flooring material on a base such as mortar, and the walls and ceiling are finished with a vinyl cloth with a plaster board as a base. The lower part of the test body 100 is supported by the lower steel beam 105, and two 1000kN jacks 104 are attached to the upper part of the test body 100 (the position of the upper steel beam).

  The structural experiment is performed by driving the jack 104 and applying a horizontal force to the test body 100. Specifically, the pushing and pulling forces are alternately applied to the test body 100 by the jack 104, and the test body 100 has positive and negative layers when the push direction of the jack 104 is positive and the pull direction is negative. Deformation angles occur alternately. In the structure experiment, the deformation step is repeatedly executed so that the interlayer deformation angle gradually increases. In each deformation step, after the specimen 100 is deformed, it is always returned to the initial state “0”. Each deformation step returns to “0” after a positive interlayer deformation angle is generated from “0” in the initial state, and then returns to “0” again after a negative interlayer deformation angle is generated. Cycle twice.

  FIG. 9 is a graph schematically showing the displacement of the interlayer deformation angle in the structural experiment. As shown in FIG. 9, the interlayer deformation angle is ± 1/400 rad in the first deformation step, the interlayer deformation angle is ± 1/200 rad in the next deformation step, and the interlayer deformation angle is ± 1/150 rad in the next deformation step. Thus, the structural experiment is conducted until the interlayer deformation angle finally becomes ± 1/20 rad.

  The deformation history of the test body 100 (see FIG. 2) is obtained by observing the damage state of the test body 100 (photographing, etc.) and acquiring information indicating the relationship between the interlayer deformation angle and the damage mode. The damage state of the test body 100 is observed in each of a neutral state where the interlayer deformation angle is “0”, a state where a positive interlayer deformation angle is generated, and a state where a negative interlayer deformation angle is generated. Moreover, the observation place of the test body 100 includes, for example, each part whose damage is governed by the interlayer deformation angle, such as an outer wall panel, a window, a frontage, a door, a wall plasterboard, a vinyl cloth, a load-bearing panel, and the like. .

  As a result of the above observation, for example, in the case where minor damage that does not require replacement of the outer wall panel is confirmed, data indicating that the first damage mode has occurred (the value of the interlayer deformation angle at the time when the first damage mode has occurred) ) Is acquired and data is acquired on the assumption that the second damage mode has occurred when the damage to the extent that the outer wall panel needs to be replaced is confirmed. Acquisition of these data means acquisition of information indicating the relationship between the interlayer deformation angle and the damage mode. In addition, by the above observation, for example, when the first damage mode is confirmed in a part of the specimen 100 and the second damage mode is confirmed in another part, the first damage mode and the second damage mode are determined. Get data as both occur.

  The above structural experiment is performed on a large number of specimens (structural models) 100 belonging to the same industrialized housing category, and the relationship between the interlayer deformation angle and the first damage mode and the second damage mode in each part of the specimen 100. Get information indicating

  Next, either one of the first and second damage modes is specified (see step S12 in FIG. 2). When the first damage mode is identified in step S12, the earthquake damage degree curve M (see FIG. 5A) of the first damage mode is information indicating the relationship between the interlayer deformation angle and the damage mode. Further, a probability density function of the earthquake damage degree curve M is derived (see step S13). The earthquake damage degree curve (fragility curve) shows the probability of occurrence of damage mode with respect to the interlayer displacement angle, and the probability density function is obtained by differentiating the earthquake damage degree curve. The probability density function corresponds to the proof stress information Rm (see FIG. 5B). When the proof stress information Rm related to the first damage mode is obtained for a large number of test bodies 100, the proof stress information storage unit 14 of the seismic design support device 1 is associated with the category belonging to the structural model related to the test body 100. Stored (see step S14).

  Next, it is determined whether or not the storage of the proof stress information in all the damage modes is completed (see step S15). For example, when the proof stress information Rn related to the second damage mode is not stored, the processes in steps S12 to S14 described above are repeatedly executed, and the earthquake damage degree curve N related to the second damage mode (see FIG. 5A). , Yield strength information Rn (see FIG. 5B) based on the earthquake damage degree curve N, and storage of the yield strength information Rn in the yield strength information storage unit 14 are performed. When it is determined that the storage of the proof stress information Rm, Rn in all the damage modes (the first damage mode and the second damage mode) is completed, the proof stress information acquisition process is ended.

  As shown in FIG. 1, when the setting of the provisional setting value of the member arrangement related to the earthquake resistance of the target building (step S2) is completed, the proof stress information Ra (for the buildings belonging to the same category as the target building based on the temporary setting value) The derivation of FIG. 7A is performed (step S3). In the present embodiment, since the upper limit value of the damage probability related to the first damage mode is allowed damage, the load bearing information Ra derived here is the load bearing information Rm related to the first damage mode (see FIG. 5B). ).

When the derivation of the proof stress information Ra of the target building (step S3) ends, the quake-resistant design support device 1 derives the response information Sa (see FIGS. 6 and 7) of the target building (response analysis process) (step S4). . The response analysis process will be described with reference to FIG. The response analysis process corresponds to a response analysis process.
(Response analysis processing)

  As shown in FIG. 3, in the earthquake-resistant design support device 1, the target earthquake set in step S1, that is, a plurality of seismic waves having the seismic motion index value selected by the customer is virtually displayed on the target building temporarily determined in step S2. The relationship between the seismic motion index value and the interlayer deformation angle in the target building is obtained by time history response analysis. Specifically, the model of the target building that was provisionally determined was simulated, and a time history response analysis using Monte Carlo simulation was performed on this model, and the distribution (average and deviation) of the response of the target building at the seismic motion index value was calculated. Obtained (step S21).

  Monte Carlo simulation is a mathematical method for obtaining an approximate solution by performing simulations using random numbers many times. For example, if seismic intensity 7 is assumed as the seismic intensity index value, hypothetical seismic waves with seismic intensity 7 are virtually input to the target building several thousand to several tens of thousands of times, and the target earthquake with seismic intensity 7 acts on the target building. The maximum interlayer deformation angle generated at the time is determined as a random variable S, and the generation probability of this interlayer deformation angle is derived as a probability density function.

  FIG. 6A is a graph in which a response (maximum interlayer deformation angle) obtained by inputting a virtual seismic wave with seismic intensity 7 is plotted as a random variable S. FIG. 6B is response information Sa derived based on the result of the response analysis shown in FIG. 6A, and is an interlayer generated when a target earthquake of seismic intensity 7 acts on the target building. The probability of occurrence of a deformation angle (maximum interlayer deformation angle) is shown.

  The earthquake-resistant design support device 1 derives the probability of occurrence of the interlayer deformation angle as a probability density function (response information) Sa by Monte Carlo simulation (step S21). Note that the response information Sa shown in the graph of FIG. 7 (b) changes so as to move in parallel from side to side by changing the value of the member arrangement related to the earthquake resistance of the target building. For example, when the number of outer wall panels is increased. If it moves to the left as shown by the alternate long and short dash line in FIG. 7B and decreases, it moves to the right as shown by the two-dot chain line in FIG. 7B.

  Next, the stress information obtained in step S21 is stored in the storage unit of the seismic design support device 1 as the temporarily determined stress information Sa of the target building (step S22), and the response analysis process is completed.

  As shown in FIG. 1, when the response analysis process (step S4) ends, the seismic design support apparatus 1 derives the damage probability Pf based on the proof stress information Ra and the response information Sa (step S5). The damage probability Pf corresponds to a damage evaluation value based on the damage mode (damage degree) when the target earthquake motion based on the customer request acts on the target building. The process for deriving the damage probability Pf corresponds to a damage evaluation value deriving step. Derivation of the damage probability Pf will be described with reference to FIG.

  FIG. 7A is a graph showing the proof stress information Ra and the response information Sa in an overlapping manner. When the proof stress information Ra exceeds the response information Sa, that is, when Ra> Sa, it indicates that the first damage mode does not occur, and when the proof stress information Ra is equal to or less than the response information Sa, that is, Ra ≦ Sa In the case, it indicates that the first damage mode occurs. Then, the damage probability Pf in the first damage mode can be derived based on the area of the region (region showing hatching) where Ra ≦ Sa in FIG.

  When the earthquake resistance design support apparatus 1 derives the damage probability Pf (step S5), the earthquake resistance design support apparatus 1 determines whether the damage probability Pf exceeds the allowable damage based on the customer request (step S6). The step of determining whether or not the damage probability Pf exceeds the allowable damage based on the customer request corresponds to a comparison step. If it is determined in step S6 that the damage probability Pf exceeds the allowable damage, for example, an error message (unsuitable member placement information) is displayed from the output unit 13 so that the operator can recognize it. The operator is informed that the earthquake resistance is insufficient. The process of step S6 is a comparison process.

  The operator who has confirmed that the error message has been notified returns to step S1 or step S2, changes the customer request information and the provisional setting value of the member arrangement related to the earthquake resistance of the target building, and performs re-input. In addition, changing the temporary setting of the member arrangement may increase the number of load-bearing panels, increase the grade if there are multiple grades in the load-bearing panel, or add other additional devices such as damping dampers. Is possible.

  The seismic design support device 1 that has received the re-input of the customer request information and the temporary setting value of the member arrangement performs steps S3 to S5, and derives the proof stress information Rb (or proof stress information Rc) and the response information Sa. Perform (see FIG. 7B). FIG. 7B illustrates the case where the customer request information and the provisional setting value of the member arrangement are changed. The response information Sa is not changed so much, and the customer request information, particularly the allowable damage (damage allowable value). This shows a case in which the proof stress information Ra is largely changed to the proof stress information Rb based on the change of. Although illustration is omitted, if the temporary setting value of the member arrangement is changed, for example, by increasing the outer wall panel, the graph of the response information Sa moves to the left, and as a result, an area where Ra ≦ Sa ( The area of hatching) is reduced.

  As shown in FIG. 7 (b), the seismic design support device 1 has the proof stress information Rb ≦ response information Sa when the customer requirement information is changed. A damage probability Pf is derived based on the area, and it is determined again whether the damage probability Pf exceeds the allowable damage. Here, if it is determined that the damage probability Pf exceeds the allowable damage, an NG message (NG determination information) is notified to the operator, and the operator changes and re-inputs the customer request information and the temporary setting value of the member arrangement. On the other hand, when it is determined that the damage probability Pf is equal to or less than the allowable damage, an OK message (OK determination information) is output from the output unit 13, and the provisional setting value of the member layout of the target building is the customer's required performance. Is output from the output unit 13 as a set value (member arrangement) that satisfies the above.

The operator who has confirmed the information output (displayed, etc.) from the output unit 13 is a member in which the provisional setting value of the member arrangement relating to the earthquake resistance of the target building temporarily set in step S2 satisfies the customer request. It is determined as a set value for arrangement (step S7). As described above, in the present embodiment, when the damage probability Pf derived in step S5 is equal to or lower than the allowable damage, the processes in steps S1 to S6 are repeatedly performed, and when the damage probability Pf is equal to or lower than the allowable damage, The temporarily set value of the member arrangement related to the earthquake resistance of the temporarily set target building is determined as the set value of the fixed member arrangement of the target building.
(Seismic design support equipment)

  Next, the seismic design support apparatus 1 used for the above seismic design method will be described with reference to FIG. FIG. 4 is a block diagram showing a functional configuration of the seismic design support apparatus 1. The seismic design support device 1 includes a control device that implements a CPU, RAM, and ROM as a hardware configuration, an input device such as a keyboard and a mouse, and an output device such as a liquid crystal display and a speaker. It is configured to be feasible.

  The seismic design support device 1 includes an input unit (condition receiving unit) 11 that receives operation inputs of various information, a proof stress information storage unit (damage information storage unit) 14 that stores proof stress information Rm and Rn, response analysis processing and comparison A control unit (control unit) 12 that executes the process and an output unit (output unit) 13 that outputs the result of the comparison process executed by the control unit 12 are provided.

  The input unit 11 receives operation input (setting input) of customer request information and a provisionally determined value of a member arrangement related to earthquake resistance for provisionally determining a target building. Further, the input unit 11 operates information for identifying the damage mode in the yield strength information acquisition process (see step S12), and information indicating the relationship between the interlayer deformation angle obtained in the structural experiment of the yield strength information acquisition process and the damage mode. Accept input.

  The control unit 12 derives the earthquake damage degree curves M and N and the derivation of the proof stress information Rm and Rn (see step S13) in the proof stress information acquisition process, and also transfers the proof stress information Rm and Rn to the proof stress information storage unit 14. Is stored (see step S14).

  Moreover, the control part 12 performs the process of above-mentioned step S3, and derives the yield strength information Ra and Rb of the target building. Furthermore, the control part 12 performs the response analysis process of step S4, and derives the response information Sa of the target building. Furthermore, the control part 12 performs the response analysis process (refer step S5), and derives the response information Sa of the target building temporarily determined. Further, when the control unit 12 executes the comparison process of step S6 and determines that the damage probability Pf exceeds the allowable damage, the control unit 12 performs the comparison process based on the changed design condition accepted by the input unit 11. If the damage probability Pf is repeatedly executed until the damage probability Pf is less than the allowable damage, and it is determined that the damage probability Pf is less than the allowable damage, the provisional setting of the member arrangement related to the earthquake resistance for finally tentatively determining the target building The value is output from the output unit 13 as the set value of the member arrangement determined for the target building.

  As described above, in the seismic design method and the seismic design support apparatus 1 according to the present embodiment, the seismic motion index value and permissible damage (damage permissible value) when an earthquake having the seismic motion index value acts on the target building according to the request from the customer. Further, a provisional setting value of member arrangement related to earthquake resistance for provisionally determining a target building is received. On the other hand, a damage probability Pf (damage evaluation value) based on the degree of damage when an earthquake having a seismic motion index value acts on the target building is derived based on each relationship derived in the proof stress information acquisition process and the response analysis process.

  Then, the damage probability Pf is compared with the allowable damage, and the customer request information or the provisional setting value of the member arrangement related to the earthquake resistance of the target building is appropriately changed until the damage probability Pf of the target building is equal to or less than the damage allowable value. When the damage probability Pf is equal to or less than the allowable damage, the temporary setting value of the member arrangement is determined as the set value of the member arrangement determined for the industrialized house. As a result, seismic design of the target building is possible, taking into account the damage degree of the building, which is closely related to the repairability of the building.

  As a result, according to the present embodiment, it is possible to specifically quantitatively evaluate the damage state of the part of the target building where the residence is planned for an earthquake corresponding to the earthquake motion index value that the customer is concerned about. Therefore, it is possible to meticulously respond to customer needs related to seismic performance, and further, the degree of damage (repair effort, cost, etc.) of each part when receiving a predetermined earthquake becomes clear, and even an amateur can judge the seismic performance of a building. It becomes easy.

  In addition, by adopting this embodiment that exhibits the above actions and effects, each part's seismic performance that meets customer's needs, is economical, considers member manufacturing, on-site workability, and maintainability, and has excellent explanation Setting is possible. Therefore, the seller of an industrialized house, for example, told customers, “Even if an earthquake with a seismic intensity of 7, it can be done with little damage and continue to live.” It is possible to talk with proposals with engineering support.

  Further, in this embodiment, for example, a building belonging to the category of a standardized building that is built based on a predetermined standard that prescribes a member to be used and its accommodation (joint), such as an industrialized house, is targeted. Since the damage level of the target building is derived based on the damage information of the structural model that belongs to the category and the behavior and damage status of the actually constructed members are similar, the earthquake-resistant design can be performed easily and accurately. This is advantageous from the viewpoint of ease of implementation in applying the seismic design method and the seismic design support apparatus 1.

Furthermore, the damage degree according to the present embodiment is classified into a plurality of damage modes according to the repair difficulty, and in the response analysis process , each of the inter-layer deformation angles and the damage modes in each part for each of a plurality of types of structural models. (Yield strength information Rm, Rn) is derived. In the above description, the case where the comparison process is performed based on the allowable damage and damage probability Pf related to the first damage mode is exemplified, but in this embodiment, the proof stress information Rn related to the second damage mode is also derived. Therefore, the comparison process based on the allowable damage and damage probability Pf according to the second damage mode, or the comparison process based on the allowable damage and damage probability Pf according to both damage modes can be performed. As a result, it becomes easier to meet customer demands in terms of repairability.

  Furthermore, in this embodiment, the damage mode classification according to the difficulty of repair is determined based on the amount of cost required for repair, so it directly responds to the repairability intended by the customer, especially the budgetary requirements. This makes it easier to perform seismic design.

  Further, in the present embodiment, the relationship (response information Ra) derived in the response analysis process is obtained probabilistically using Monte Carlo simulation. Although it is very difficult to accurately predict the impact of an actual earthquake on an industrialized house, the response information Ra is probabilistically derived, and the response with a certain degree of certainty is obtained with relatively high accuracy. Information Ra can be derived.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, in the above-described embodiment, the aspect in which the damage degree is classified into the first and second damage modes has been described. However, the damage degree may be a single damage mode or may be classified into three or more damage modes. May be.

DESCRIPTION OF SYMBOLS 1 ... Seismic design support apparatus, 100 ... Test body (structural model), 14 ... Strength information storage part (damage information storage means), 11 ... Input part (condition reception means), 12 ... Control part (control means), 13 ... Output unit (output means), Rm, Rn: Strength information (damage information).

Claims (5)

A seismic design method for a target building that belongs to a category of standardized buildings constructed based on a predetermined standard and has a desired floor plan,
A damage information deriving step for deriving a relationship between an interlayer deformation angle and a damage degree in each part by an experiment using a structural model actually belonging to the category of the standardized building;
Temporary setting of seismic motion index value provisionally determined for design, allowable damage value when an earthquake having the seismic motion index value acts on the target building, and seismic resistance member arrangement for temporarily determining the target building A condition setting process for setting a value;
A response analysis step of virtually inputting a seismic wave having the seismic motion index value for the temporarily determined target building, and deriving a relationship between the seismic motion index value and the interlayer deformation angle in the temporarily determined target building; ,
Deriving damage evaluation values based on the degree of damage when an earthquake having the seismic motion index value acts on the temporarily determined target building based on the relationships derived in the damage information deriving step and the response analyzing step Damage evaluation value derivation process,
A comparison step for comparing the damage evaluation value and the damage tolerance,
If the damage evaluation value exceeds the damage tolerance value in the comparison step, the damage evaluation value is changed by changing at least one of the earthquake motion index value, the damage tolerance value, and the temporary setting value. The condition setting step, the damage information derivation step, and the comparison step are repeated until the damage allowable value is less than or equal to the damage allowable value. A seismic design method, characterized in that a set value is determined as a set value of a fixed member arrangement of the target building. The degree of damage is classified into a plurality of damage modes according to the degree of difficulty required for recovery from damage,
The seismic design method according to claim 1, wherein in the response analysis step , a relationship between the interlayer deformation angle and each damage mode at each part is derived for each of the plurality of types of structural models. The seismic design method according to claim 2, wherein the degree of difficulty required for recovery from damage is determined based on an amount of cost required for repair. In the response analysis step, a plurality of the seismic waves are virtually input,
The seismic design method according to any one of claims 1 to 3, wherein the relationship derived in the response analysis step is obtained probabilistically. A seismic design support device for a target building that belongs to a category of standardized buildings constructed based on a predetermined standard and has a desired floor plan,
A damage information storage means for storing damage information indicating a relationship between an interlayer deformation angle and a damage degree in each part of the structural model actually belonging to the category of the standardized building;
Temporary setting of seismic motion index value provisionally determined for design, allowable damage value when an earthquake having the seismic motion index value acts on the target building, and seismic resistance member arrangement for temporarily determining the target building Condition accepting means for accepting a value setting input;
A seismic wave having the seismic motion index value is virtually input to the temporarily determined target building, and response information indicating a relationship between the seismic motion index value and the interlayer deformation angle in the temporarily determined target building is derived. In addition, based on the damage information and the response information stored in the damage information storage means, the damage evaluation value based on the damage degree when the earthquake having the seismic motion index value acts on the temporarily determined target building Control means for performing a comparison process for deriving and comparing the derived damage evaluation value and the damage allowable value;
Output means for outputting the result of the comparison process executed by the control means,
When the control means determines that the derived damage evaluation value exceeds the damage tolerance value, the control means is a value accepted by the condition acceptance means, and the earthquake motion index value, the damage tolerance value, and The comparison process based on at least one changed value of the temporary setting value is repeatedly performed until the damage evaluation value is equal to or less than the damage tolerance value, and it is determined that the damage evaluation value is equal to or less than the damage tolerance value In this case, the provisional set value is output from the output means as a set value of the fixed member arrangement of the target building.

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