JP6016359B2 - Method of constructing seismic control building structure and seismic control member therefor - Google Patents

Description

  The present invention relates to a construction method of a seismic control building structure for constructing a building structure into a seismic control structure, and a seismic control member therefor.

  It is known that when building structures such as buildings are to be controlled, there are active control structures and passive control structures. In view of cost and maintenance, passive dampers are often cost-effective and often used. Many passive vibration control dampers have been developed, including viscous dampers, viscoelastic dampers, oil dampers, steel dampers, and friction dampers.

  For example, in Patent Document 1 as a known example of a viscoelastic damper, an energy absorber whose viscoelasticity is variable according to voltage is installed between a frame fixed to the beam side and an auxiliary frame fixed to the wall side. Normally, a voltage is applied between the frame and the auxiliary frame via the voltage controller, and the wall is rigidly supported by the viscoelastic damper. When the vibration sensor detects vibration, the voltage between the frame and the auxiliary frame is increased or decreased. A vibration control device is described that adjusts the energy absorber to viscoelasticity that is optimal for vibration absorption.

  As a conventional installation method for installing the vibration control device in a frame surrounded by column beams, there are many types as shown in FIGS. 11 (a) and 11 (b) are braces and shear links are joined directly into the frame, and FIGS. 11 (c) and 11 (d) are studs and joints that are joined indirectly into the frame. FIG. 11E shows an amplification mechanism type. In addition to the form shown in FIG. 11, a method of installing on an external construction surface has been proposed as a means for seismic reinforcement.

JP-A-6-66044

  Since the above-described conventional installation method is a method of installing in one frame surrounded by column beams in the frame, there is a problem that a usable space is limited in the building. In addition, the vibration control device such as Patent Document 1 requires an energy absorber, a voltage control device, and a vibration sensor whose viscoelasticity is variable according to the voltage, and a specific material is indispensable, and the configuration is complicated. End up.

  In view of the above-mentioned problems of the prior art, the present invention does not use a vibration control device using a specific material, and there is no restriction on the use of space in the building structure, and therefore a construction method for the vibration control building structure. It aims to provide a vibration control member.

In order to achieve the above object, the method for constructing a seismic control building structure according to the present embodiment includes a central portion having a shape extending in the vertical direction and protruding so as to bulge in the horizontal direction in the center, and positioned at the upper and lower ends thereof. using a plurality of vibration control member having a mounting portion, each of said vibration control member, with respect to the junction between the columns and beams in the external or the external building structure, over the upper and lower layers of the building structure wherein the mounting the mounting portion, and attaching so that the central portion swells to the outside of the building structure, each vibration control member, bear the shearing force by the interlayer displacement of each of the building structure and alone deformation It is characterized by that.

According to construction method of the seismic control building structure, the vibration control member, against the junction of the external or columns and beams at the outside of the building structure, mounted in the mounting portion across the upper and lower layers of the building structure Therefore, there is no restriction on the use of space inside the building structure. In addition, the damping member is a simple structure having a central part protruding so as to bulge in the horizontal direction and mounting parts at the upper and lower ends, and can absorb stable energy during an earthquake and is easily available. Therefore, no specific material is required.

  In the construction method of a seismic control building structure, it is preferable to adjust a shearing force applied to the seismic control member during deformation by adjusting rigidity and / or proof stress of the attachment portion with respect to the central portion.

Moreover, the said damping member can be attached to the front end surface or side surface of the protrusion part of the beam in the said junction part. Moreover, the said damping member can be attached to each layer, 2 layers, or 3 layers of the said building structure.

  Moreover, it is preferable to attach the said damping member to at least two opposing surfaces around the building structure. Moreover, you may make it attach the said damping member to the center of each surface around the said building structure.

  The damping member according to the present embodiment is used for the construction method of the above-described seismic building construction.

  According to this vibration control member, stable energy absorption is possible at the time of an earthquake or the like by a simple structure having a central portion protruding so as to bulge in the horizontal direction and mounting portions at the upper and lower ends thereof. It can be composed of a general steel material that is not a material and is easily available.

  According to the construction method of a seismic control building structure of the present invention, a seismic control device using a specific material is not used, and the use of space in the building structure is not limited. For this reason, the freedom degree of design of the internal space of a building structure improves.

  According to the vibration damping member of the present invention, since it can be constructed from a general steel material that is not a specific material, the material cost is not increased.

It is a perspective view which shows the 1st example of the damping member by this embodiment. It is a perspective view which shows the 2nd example of the damping member by this embodiment. It is a figure which shows the hysteretic property (relationship between a horizontal displacement and a shear force) at the time of using the damping member of FIG. 1, FIG. 2 for a building. It is a perspective view which shows the example which has arrange | positioned the damping member of FIG. 1 or FIG. 2 in the both sides of a building in this embodiment. It is a perspective view which shows the example which has arrange | positioned the damping member of FIG. 1 or FIG. 2 in the center part of a building in this embodiment. It is a perspective view which shows the example which has arrange | positioned the damping member of FIG. 1 or FIG. 2 for every two layers in the both sides of a building in this embodiment. It is a principal part side view which shows the example of attachment of the damping member in FIGS. It is the figure which shows the seismic response analysis result which shows the response characteristic at the time of earthquake (earthquake BCJ-L2 (maximum acceleration 355.66cm / s ² )) with and without the damping member in the 14th floor building, and shows the interlayer deformation angle for each floor . It is a figure which shows the seismic response analysis result in the case of observation seismic wave Elcentro-NS (maximum acceleration 341.7cm / s < ² >) similarly to FIG. 8, and shows the interlayer deformation angle for every floor. 7 is a side view of the main part showing the case where the beam has a protruding portion protruding from the column, and a view from direction b in FIG. 10A to explain an example of attachment of the two vibration control members in FIG. FIG. It is a figure for demonstrating the conventional installation methods (a)-(e) which install a damping device in the frame enclosed by the column beam.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  First, the damping member according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a first example of a vibration control member according to the present embodiment. FIG. 2 is a perspective view showing a second example of the vibration control member. FIG. 3 is a diagram showing a history characteristic (relationship between horizontal displacement and shearing force) when the damping member of FIGS. 1 and 2 is used in a building.

  A damping member 1 (first example) in FIG. 1 has an elongated shape extending in the vertical direction as a whole, a central portion 2 having a shape that is located in the center and protrudes so as to swell laterally, and upper and lower ends thereof And mounting portions 3 and 4.

  The central part 2 has an elongated shape extending straight, and the attachment parts 3 and 4 have attachment surfaces 3a and 4a located at respective end parts. The damping member 1 is attached to the building structure with the attachment surfaces 3a and 4a. The attachment portions 3 and 4 extend from the attachment surfaces 3a and 4a so as to protrude obliquely downward and obliquely upward, and are connected to the central portion 2. Thereby, the damping member 1 has a loop shape in which the central portion 2 that extends straightly protrudes in a lateral direction with reference to the mounting surfaces 3a and 4a.

  As described above, when the vibration control member 1 is attached to the building structure by the attachment surfaces 3a and 4a of the attachment portions 3 and 4, the central portion 2 extends in the vertical direction and protrudes in the horizontal direction. . The vibration control member 1 has a central portion 2 and mounting portions 3 and 4 basically configured to have the same thickness and width, and a general JIS standard steel material can be used as a material.

  Next, another shape of the vibration control member will be described. The damping member 11 (second example) of FIG. 2 has a central portion 12 that is straight and elongated like FIG. 1, but the mounting portions 13 and 14 are configured wider than the central portion 12. 1 is different from FIG. The vibration control member 11 has high rigidity due to the wide attachment portions 13 and 14, and the attachment portions 13 and 14 are more difficult to deform than the central portion 12. As in FIG. 1, the damping member 11 has a loop shape in which a central portion 12 that extends straightly projects in a lateral direction with reference to the mounting surfaces 13 a and 14 a.

  1 and 2 are configured in a spindle-shaped loop shape, so that stable energy absorption is possible. The damping members 1 and 11 bear a shear force due to the interlayer displacement of the building, and the burden shear force changes depending on the amount of deformation. The burden shear force can be determined by the steel material size of the vibration control members 1 and 11.

  In addition, when the steel material size of the central part of the damping member is the same, the deformation capacity against the shearing force of the entire damping member can be adjusted by adjusting the rigidity and / or proof stress of the upper and lower mounting parts. It is possible to adjust the burden shearing force of the member.

  A seismic control building can be constructed by installing the above-mentioned seismic control members 1 and 11 outside the building or at an appropriate location on the building surface. Fig. 3 shows the hysteresis properties (relationship between horizontal displacement and shearing force) when using rolled steel (SN400) for building structures of -200 x 200 x 8 x 12. As can be seen from FIG. 3, the damping member 11 with the increased rigidity of the mounting portion has a greater shear force for the same horizontal displacement than the damping member 1 without increasing the rigidity of the mounting portion. As described above, the shearing force can be adjusted by adjusting the rigidity of the mounting portion with respect to the central portion.

  Next, the installation method and installation position of the vibration control member in the building in this embodiment will be described with reference to FIGS. FIG. 4 is a perspective view showing an example in which the vibration control members of FIG. 1 or FIG. 2 are arranged on both sides of the building in the present embodiment. FIG. 5 is a perspective view showing an example in which the same is placed in the center of the building. FIG. 6 is a perspective view showing an example in which two layers are arranged on both sides of the building.

  In the example shown in FIG. 4, the damping member 1 in FIG. 1 (or the damping member in FIG. 2) is connected to the joint 10 between the column C and the beam B on the four exterior surfaces of the building BU having a steel structure with the column C and the beam B. The building BU has a damping structure by attaching the seismic member 11) over the upper and lower layers of the building BU so that the central portion 2 extends in the vertical direction.

  In the example shown in FIG. 5, the damping member 1 of FIG. 1 (or the damping member 11 of FIG. 2) is extended to the joint 10 at the center of the four surfaces outside the building BU so that the center 2 extends in the vertical direction. The building BU has a seismic control structure by being mounted over the upper and lower layers of the building BU. In FIG. 5, it has the structure which arrange | positions the two damping members 1 in each junction part 10. FIG.

  In the example shown in FIG. 6, the vibration control member 1 of FIG. 1 (or the vibration control member 11 of FIG. 2) is connected to the joint 10 on the four outer surfaces of the building BU so that the central portion 2 extends in the vertical direction. The building BU has a seismic control structure by attaching every two layers.

  In addition, you may attach the damping member 1 for every three layers of building BU. Moreover, when attaching the damping member 1 for every 2 layers or 3 layers, you may make it attach alternately.

  According to the seismic control building shown in FIGS. 4 to 6, even if the control of the building is controlled by attaching the control member to the outside of the building, not the inside of the building surface, the use of space in the building is limited. As a result, the degree of freedom in designing the interior space of the building is improved. Moreover, since a general steel material that can be easily obtained can be used as a constituent material of the vibration control member, a specific material is not necessary, and the material cost is not high, which is advantageous in terms of cost.

  Moreover, according to the construction method of the seismic control building of this embodiment, since the seismic control member is attached to the outside of the building, the construction inside the building becomes unnecessary, and therefore, not only in the newly built building but also in the existing building. Applicable and can be used to control existing buildings.

  4 and 5, the vibration control members are installed on all the floors, but it is only necessary that the installation location can obtain the amount of damper required by the design.

  FIG. 7 shows an example of attaching the vibration control member in FIGS. As shown in FIG. 7, flat portions 3 b are provided above and below the attachment surface 3 a of the attachment portion 3, and the mounting surface 3 a is applied to the joint portion 10 between the column C and the beam B, and the bolt BT is passed through the flat portion 3 b and tightened. Thus, the vibration control member 1 can be attached to the joint 10 of the building. The same configuration can be applied to the other mounting portion 4. It should be noted that the attachment example in FIG. 7 is an example, and other attachment methods and means may be used.

  In FIG. 7, the damping member is attached to the joint 10 between the column C and the beam B. However, the present invention is not limited to this, and may be in the vicinity of the joint. For example, the junction between the column and the beam If a beam protrudes from the beam, a vibration control member may be attached to the protruding beam. This case will be described with reference to FIG.

  FIG. 10 is a side view of a main part showing a case where the beam of FIG. 7 has a protruding portion protruding from the column (a) and FIG. 10 (a) for explaining an attachment example of the two vibration control members in FIG. It is the figure (b) seen from the direction b.

  As shown in FIG. 10A, when the beam B has a protruding portion BP protruding from the column C, the damping member 1 can be attached to the protruding end surface B1 of the protruding portion BP in the same manner as in FIG. Good.

  In the case of a structure in which two damping members 1 are arranged at each joint 10 as shown in FIG. 5, the side surface B2 (shown by hatching in the figure) of the protruding part BP of the beam B in FIG. 10 (a) is used. The damping member 1 can be attached. That is, as shown in FIG. 10B, the mounting surfaces 3a of the two damping members 1 are applied to both side surfaces B2 and B3 of the protruding portion BP of the beam B in the same manner as in FIG. Each damping member 1 can be attached to the protruding portion BP of the beam B by being tightened. In FIG.10 (b), each damping member 1 is located so that it may mutually oppose on both sides of the beam B, and each center part 2 protrudes in the opposite direction 180 degree | times.

Next, regarding the vibration control effect of the vibration control building according to the present embodiment, response characteristics at the time of an earthquake will be described with reference to FIGS. 8 and 9 in comparison with the case where there is no vibration control member. Fig. 8 shows the seismic response analysis results showing the response characteristics during the earthquake (seismic wave BCJ-L2 (maximum acceleration 355.66 cm / s ² )) with and without the damping members in the 14th floor building. FIG. FIG. 9 shows the seismic response analysis results for the observed seismic wave Elcentro-NS (maximum acceleration 341.7 cm / s ² ), and shows the interlayer deformation angle for each floor.

  As shown in the seismic response analysis results of FIGS. 8 and 9, the interlayer deformation angle is smaller than the case where there is no damping member at most floors, and the damping member according to the present embodiment. It can be seen that the seismic control effect is obtained by mounting.

  As described above, the modes for carrying out the present invention have been described. However, the present invention is not limited to these, and various modifications can be made within the scope of the technical idea of the present invention. For example, the vibration control members 1 and 11 of FIGS. 1 and 2 have an overall shape such as “]”, but the present invention is not limited to this shape. For example, “)” or It may be in the form of “>”. That is, the overall shape of the damping member may be a substantially arc shape or a shape that is bent at the center.

  Further, in the vibration damping member of the present embodiment, the width of the mounting portion is increased with respect to the central portion in order to adjust the shear load force, but the rigidity is increased. However, the present invention is not limited to this, and the thickness of the mounting portion is increased. Alternatively, both width and thickness may be adjusted. Furthermore, the proof stress of the attachment portion may be increased, or the attachment portion may be made of a steel material having a high proof stress and attached to the central portion by welding or the like.

  Moreover, in this embodiment, although the construction method by this invention was applied to buildings, such as a building and a condominium, this invention is not limited to this, It is applicable to a building structure generally.

1,11 Damping member 2,12 Center part 3,4 Attachment part 13,14 Attachment part 10 Joint part 3a, 4a, 13a, 14a Attachment surface B Beam C Column BU Building (building structure)

Claims (7)

Using a plurality of vibration control members having a central portion extending in the vertical direction and projecting so as to bulge in the horizontal direction in the center, and mounting portions located at the upper and lower ends thereof,
Each of said vibration control member, with respect to the junction between the columns and beams in the external or the external building structure, mounted in the mounting portion across the upper and lower layers of the building structure, and the central portion is the building Install so that it swells outside the structure,
Each said damping member is deformed independently, and bears the shear force by the interlayer displacement of the said building structure, The construction method of the damping structure characterized by the above-mentioned.   The construction method of a seismic control building structure according to claim 1, wherein the shearing force that the seismic control member bears upon deformation is adjusted by adjusting rigidity and / or proof strength of the attachment portion with respect to the central portion.   The construction method of a seismic control building structure according to claim 1 or 2, wherein the seismic control member is attached to a front end surface or a side surface of a protruding portion of the beam at the joint.   The construction method of a seismic control building structure according to any one of claims 1 to 3, wherein the seismic control member is attached to each layer, two layers, or three layers of the building structure.   The construction method of a seismic control building structure according to any one of claims 1 to 4, wherein the control member is attached to at least two opposing surfaces around the building structure.   The construction method of a seismic control building structure according to any one of claims 1 to 5, wherein the seismic control member is attached to the center of each surface around the building structure.   A vibration control member, which is used in the method for constructing a vibration control building structure according to any one of claims 1 to 6.

Images