JP3764005B2 - Dynamic absorber for a three-story ramen structure house - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a three-storied house in which a steel frame is constituted by heavy steel H-shaped steel and a dynamic vibration absorber, which is a vibration suppressing device, is arranged to reduce traffic vibration.
[0002]
[Prior art]
Due to the dense population and soaring land prices, there is a tendency to build three-story houses for the purpose of second-generation or third-generation houses in narrow areas of the city. Population density has led to an increase in construction work, residential land around factories and offices, and an increase in traffic, and vibration pollution has been regarded as a problem. Vibration pollution is mainly caused by construction work, factories, offices and road traffic. These vibrations are transmitted to the building and may make the residents in the building feel uncomfortable. As a method of reducing the vibration applied to the structure, a damping device is disposed between the foundation and the structure shown in JP-A-9-13740, or vibration control is arranged on the roof of a building shown in JP-A-10-82208. Things are also known.
[0003]
[Problems to be solved by the invention]
Traditionally, three-story houses using a steel frame structure with a ramen construction method are well known, but these are related to buildings where many families live, such as condominiums and apartment houses. In the case of a three-story house, the cost and the design and planning of a three-story house with a structure are required. With the technique disclosed in Japanese Patent Laid-Open No. 9-13740 described above, it is difficult to sufficiently remove vibrations, and even if the load on the building due to an earthquake can be reduced, it is difficult to adapt to vibration pollution such as traffic vibrations. .
[0004]
Furthermore, in the technique shown in Japanese Patent Laid-Open No. 10-82208, vibration control is performed on a building having a large mass such as a building, and the mass is much smaller than that of a building such as a house simply by arranging the vibration control in the house. In buildings, it is difficult to remove fine vibrations such as traffic vibrations. As described above, in the conventional technology, it is difficult to construct a house where a free living space can be designed and a resident can live comfortably regardless of location conditions.
[0005]
The present invention relates to a method for optimally arranging a dynamic vibration absorber for realizing a vibration-resistant structure without restricting the design of a living space for houses of various shapes and variations.
[0006]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, a configuration for solving the problem will be described.
[0007]
When vibration is transmitted to a house due to traffic vibration or the like, not only the housing structure of the house but also the interior and exterior resist the shaking. For this reason, the dynamic vibration absorber disposed in the house is arranged not only in the housing structure of the house but also in consideration of the structure of the exterior and interior of the house in which the dynamic vibration absorber is disposed. Can be done.
[0008]
The arrangement method of the dynamic vibration absorber for efficiently exhibiting the vibration damping effect of the dynamic vibration absorber in consideration of the structure of the housing structure, the exterior, and the interior will be described below.
[0009]
A steel frame is composed of heavy steel H-shaped steel, and the first floor pillar 12 is erected on the foundation 25, and the first floor through beam 1a is fixed on the first floor pillar 12, and the first floor through beam is constructed. A split pillar 15 on the second floor is erected on 1a, a through beam 1b on the second floor is installed on the upper end of the split pillar 15 on the second floor, and a split pillar 16 on the third floor is placed on the second beam 1b. Is installed on the upper end of the split pillar 16 on the third floor, and the first floor, the second floor, and the third floor through beams 1a, 1b, and 1c are mainly installed on the first floor. A dynamic vibration absorber that reduces traffic vibration in a three-story ramen-structured house with a beam that has been divided into the pillar 12, the second-floor pillar 15, and the third-floor pillar 16, and the number of divided pillars is reduced toward the upper floor. When the towers and the like are arranged at the position of the center of gravity G of the rooftop 31 when the 26a and 26b are arranged on the rooftop 31, the dynamic vibration absorber 26 is connected to the shorter side of the house. The dynamic vibration absorber 26a for SD vibration and the dynamic vibration absorber 26b for vibration in the longitudinal direction LD of the house are two, and the double vibration absorbers 26a and 26b are located at point-symmetrical positions with respect to the gravity center position G of the house. It is to be arranged .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described.
FIG. 1 is a bird's-eye view showing the structure of a three-story house, and FIG. 2 is a perspective view showing the structure of the through beam 1a of the house used in the present invention and the pillar / beam joints of the first-floor 12 and second-floor pillars 15. FIG. 3 is a schematic diagram showing how to receive the vibration of the house, FIG. 4 is a schematic diagram showing an operational configuration of the dynamic vibration absorber, and FIG. 5 is a schematic diagram showing a vibration damping mechanism of the dynamic vibration absorber.
[0011]
FIG. 6 is a perspective view showing a house in which a dynamic vibration absorber is arranged on the roof, FIG. 7 is a plan view, FIG. 8 is a perspective view showing the house in which a dynamic vibration absorber is arranged on the roof with a penthouse, and FIG. 10 is a perspective view showing a house in which a dynamic vibration absorber is arranged on a linearly independent straight line through the center of gravity, FIG. 11 is also a plan view, and FIG. 12 is a point-symmetrical position with respect to the center of gravity. The perspective view which shows the arrange | positioned house, FIG. 13 is a top view similarly.
[0012]
1 and 2, the ramen construction method for a three-story house used in the present invention will be described.
A column 12 is erected on the foundation 25, and a through beam 1 a is fixed on the column 12. A column 15 is erected on the through beam 1 a, and a through beam 1 b is horizontally installed on the upper end of the column 15. Further, a column 16 is erected on the through beam 1 b, and a through beam 1 c is installed on the upper end of the column 16. The ramen construction method for a three-story house used in the present invention has a structure mainly composed of through beams 1a, 1b, and 1c as shown in FIG. Mainly the through beams 1a, 1b, and 1c, the first-floor column 12, the second-floor column 15, and the third-floor column 16 are divided columns, and are structured to be joined to the top and bottom of the through beam 1a as shown in FIG. Therefore, there is no need for the second-floor pillar 15 on the first-floor pillar 12 and the third-floor pillar 16 on the second-floor pillar 15. Since the number of pillars required on each floor is determined, the number of divided pillars can be reduced as the level goes up.
[0013]
Next, the vibration-resistant structure of the house used for this structure is demonstrated.
First, the vibration resistance characteristics of the beam winning structure will be described with reference to FIG.
In the unbalanced house 21b, the building tends to be twisted when subjected to vibration. Since the torsional element is added to the vibration generated in this case, the vibration component increases, the temporal change is complicated, and it is difficult to suppress the vibration. In addition, the load on the house is large. In the house 21 having a beam-winning structure, a necessary number of pillars are arranged on each floor, and the house is easily balanced on each floor. Since the columns are disposed along the beams, the balance and rigidity in the horizontal direction are high, and it is easy to receive vibrations horizontally. Thereby, the vibration which a house receives can be simplified and this vibration can be suppressed easily. Moreover, the load which a house receives can be reduced and the durability of a house can be improved.
[0014]
A dynamic vibration absorber 26 is disposed in the upper part of the house as shown in FIG. 4, and vibration transmitted from the vibration source to the house through the ground is eliminated by the dynamic vibration absorber 26. At this time, the dynamic vibration absorber 26 is optimally adjusted with respect to the shaking of the house.
A mechanism for eliminating vibration by the dynamic vibration absorber 26 will be described.
When vibration as shown in FIG. 4 (b) is transmitted to the house in the state shown in FIG. 4 (a), the house starts to shake as shown in FIG. 4 (c). As the house shakes, the vibration is transmitted to the dynamic vibration absorber 26, and as shown in FIG. 4D, the dynamic vibration absorber 26 gives the house an inertial force using the transmitted vibration. As you can see, the shaking of the house can be eliminated.
[0015]
Next, the configuration of the dynamic vibration absorber will be described.
The dynamic vibration absorber is generally composed of an elastic member S, a damping member D, and a mass body M, and the coupling method is a straight line connecting the elastic member S, the damping member D, and the mass body M shown in FIG. It is also possible to connect them. Further, there is a method of connecting the elastic member S and the damping member D in parallel and connecting to the mass body M as shown in FIG. Moreover, generally the mass of the mass body M is 1% of a house.
Furthermore, two dynamic vibration absorbers that absorb vibrations in one direction shown in FIGS. 5A and 5B can be provided to absorb vibrations in the front-rear and left-right directions. Alternatively, as shown in FIG. 5C, a pair of elastic members S and damping members D are connected to one mass body M in the front-rear and left-right directions, and the vibration in the front-rear and left-right directions is absorbed by one dynamic vibration absorber. You can also. By using one mass body in which a pair of elastic members S and damping members D acting in the front-rear and left-right directions are connected, the arrangement space for the dynamic vibration absorber can be reduced, and the installation becomes easy. The present invention is not particularly limited to the dynamic vibration absorber, and may be any one that can be disposed in a house and can efficiently absorb vibration such as traffic vibration.
[0016]
Since the above-described dynamic vibration absorber is generally composed of an elastic member, a damping member, and a mass body, it has a certain frequency characteristic. The frequency characteristic is a frequency at which the mass body is easily displaced, and can be adjusted by changing the characteristics (elastic coefficient, friction coefficient or viscosity) of the elastic member and the damping member.
In addition, since the vibration is reduced by converting the vibration into thermal energy through a frictional force or viscous resistance by the damping member, a certain amount of stroke is required for the damping member to operate. In addition, a certain amount of stroke is required to cancel the vibration by the inertial force generated in the mass body.
For this reason, the vibration that is absorbed by the dynamic vibration absorber has a large period. The target range of vibration pollution is generally 1 to 80 Hz. The dynamic vibration absorber is only required to correspond to a frequency of 2 to 5 Hz that is easy for a resident to feel in this range of frequencies. In this range, the vibration of the house is reduced by the dynamic vibration absorber.
[0017]
Next, the arrangement position of the dynamic vibration absorber 26 according to this configuration will be described.
FIG. 6 shows an example of a configuration in which the dynamic vibration absorber 26 is arranged on the roof 31 of a flat roof house. The dynamic vibration absorber 26 is arranged at the highest position of the house. The amplitude generated in the house due to the vibration transmission increases as it becomes higher than the base. For this reason, by arranging the dynamic vibration absorber 26 at the highest position of the house, it is possible to efficiently absorb the vibration transmitted to the house. In order to make maximum use of the vibration absorbing power of the dynamic vibration absorber 26, it can be stored on the rooftop 31 of a flat roof house as described above, or can be stored under the rooftop of the rooftop. In a house, various arrangements such as a hut and a roof are possible, and the same effect can be obtained.
[0018]
6 and 7, when the shape of the building is long in one direction, the building is less susceptible to shaking in the short direction SD than the longitudinal direction LD and is susceptible to vibration. For this reason, it is desirable to preferentially absorb the vibration of the building in the short direction SD. Therefore, if a dynamic vibration absorber arrangement 26 that absorbs vibration in one direction is disposed on the roof of such a house, the dynamic vibration absorber 26 is disposed so as to absorb vibration in the short direction SD (or Setting).
By setting it as such a structure, it becomes a structure which can absorb the vibration of the transversal direction SD which needs to absorb preferentially efficiently by installing one dynamic vibration absorber which absorbs the vibration of one direction. In other words, unlike high-rise buildings and condominiums, single-family homes cannot cost a lot of vibration-resistant structures, so dynamic vibrations that are highly effective in a minimal configuration like this configuration. The arrangement method of the vessel is important. Of course, when there is no problem in cost, or when it is necessary to sufficiently absorb vibrations in both the short direction SD and the long direction LD due to the structure of the house, the dynamic vibration absorber 26 is used as described above. May be configured to absorb vibrations in both the short direction SD and the long direction LD.
[0019]
Further, in order to absorb the vibration of the house most efficiently and reduce the shaking of the building, the arrangement of the dynamic vibration absorber 26 is desirably a position that wraps with the center of gravity of the building in plan view. Therefore, in the configuration examples shown in FIGS. 6 and 7 described above, the dynamic vibration absorber 26 is arranged at the gravity center position G of the rooftop 31.
In this manner, if the dynamic vibration absorber 26 can be installed on the roof or the like that is the highest position in the house and can be disposed at the center of gravity position G that overlaps the center of gravity of the building in plan view. Then, the dynamic vibration absorber 26 is disposed at an optimal position for absorbing vibration.
However, the roof of a building may also be used for various purposes. For example, as shown in FIG. 8, a penthouse 40 may be provided on the rooftop 31 of a building. (In addition, there may be a case where a tower, a warehouse, a gardening space, or the like provided for accommodating a water supply / exhaust device is provided on the rooftop 31.)
[0020]
In this case, when the dynamic vibration absorber 26 can be installed at the upper part, inside, or lower part of the penthouse 40, the dynamic vibration absorber 26 can be arranged at the optimum position as described above, but this is impossible. In this case, as shown in FIGS. 8 and 9, the dynamic vibration absorber 26 is eccentric from the center of gravity position G in the lateral direction SD.
That is, as described above, since the house is more susceptible to shaking in the short direction SD than in the longitudinal direction LD, the dynamic vibration absorber 26 is set to absorb vibration in the short direction SD. By shifting the arrangement on the center of gravity line to SD, the arrangement of the dynamic vibration absorber 26 deviates from the position of the center of gravity G, but since it is installed on the center of gravity line, there is almost no vibration absorption loss.
Furthermore, when the dynamic vibration absorber 26 is arranged so as to suppress vibration in the longitudinal direction of the house and the dynamic vibration absorber 26 cannot be arranged at the center of gravity position G, the dynamic vibration absorber 26 is placed in the longitudinal direction LD of the house. Make it eccentric. Vibrations such as traffic vibrations are transmitted through the exterior and interior of the house.
That is, depending on the shape of the house and the arrangement of the partitions, the house may be more susceptible to shaking in the longitudinal direction LD than in the short direction SD. In this case, the dynamic vibration absorber 26 is set to absorb vibrations in the longitudinal direction LD. Depending on the construction of the house, such as there are obstacles in the center of gravity position and the short side direction, the placement of the dynamic vibration absorber 26 deviates from the center of gravity position G by shifting the placement on the center of gravity line in the longitudinal direction LD. Since it is installed on the line, it has a configuration with almost no vibration absorption loss.
[0021]
With this configuration, the dynamic vibration absorber 26 can be disposed without restricting the roof space that can be used for various purposes, and a sufficient vibration-resistant structure can be realized. For this reason, it is possible to provide a house that has both a functional surface having a vibration-resistant structure and a comfort that can effectively use the rooftop space. As described above, the house is susceptible to vibration in the short direction. Since the dynamic vibration absorber 26 is configured with a minimum configuration that absorbs the above, it is possible to provide a house that is excellent in economic efficiency.
[0022]
Next, another configuration example of the method of arranging the dynamic vibration absorber will be described with reference to FIGS. 10 to 13.
First, in the configuration example described in FIGS. 10 and 11, when the dynamic vibration absorber cannot be disposed at the center of gravity of the house by the penthouse 40, it moves on a line extending along the center of gravity G in a primary independent direction. A vibration absorber is provided. In particular, by providing the dynamic vibration absorbers 26a and 26b on straight lines parallel to the short direction SD and the long direction LD of the house, the house can be efficiently damped. Here, the dynamic vibration absorbers 26a and 26b may be effective in one direction. The dynamic vibration absorber 26a acts on the vibration in the short direction SD of the house. Since the dynamic vibration absorber 26a is disposed on a line parallel to the short direction SD along the center of gravity G, the dynamic vibration absorber 26a is disposed on the center of gravity G against vibration in the short direction SD of the house. It works as if it were.
And the dynamic vibration absorber 26b acts with respect to the vibration of the house longitudinal direction LD. Since the dynamic vibration absorber 26b is disposed on a line parallel to the longitudinal direction LD along the center of gravity G, the dynamic vibration absorber 26b is disposed on the gravity center G with respect to vibration in the longitudinal direction LD of the house. It works as if it were. Since vibrations other than the short direction SD and the longitudinal direction LD are decomposed into components of the short direction SD and the longitudinal direction LD, the dynamic vibration absorber 26a. The vibration control effect can be exhibited by 26b.
Thus, even when a dynamic vibration absorber cannot be disposed at the center of gravity G by the penthouse 40, a high vibration damping effect can be exhibited by the dynamic vibration absorbers 26a and 26b. Furthermore, since a unidirectional dynamic vibration absorber can be used, the cost concerning construction can be reduced.
[0023]
Next, in the embodiment described in FIGS. 12 and 13, when the dynamic vibration absorber cannot be disposed at the center of gravity position of the house by the penthouse 40, the dynamic vibration absorbers 26 a and 26 b are placed at positions symmetric with respect to the gravity center G. Each is arranged. In this case, the dynamic vibration absorbers 26a and 26b are dynamic vibration absorbers acting in the XY directions.
Since the dynamic vibration absorbers 26a and 26b are disposed at point-symmetrical positions with respect to the center of gravity G, the resultant force of the vibration damping force generated in the dynamic vibration absorbers 26a and 26b is the position where the dynamic vibration absorbers 26a and 26b are disposed. It has an effect equivalent to that generated at the center of gravity G which is an intermediate point of
Thus, even when a dynamic vibration absorber cannot be disposed at the center of gravity G by the penthouse 40, a high vibration damping effect can be exhibited by the dynamic vibration absorbers 26a and 26b.
Furthermore, traffic vibrations are transmitted to the house not only by the housing structure of the house but also by the interior and exterior. Therefore, by arranging the dynamic vibration absorbers 26a and 26b outside the house having many interiors and exteriors, vibrations transmitted from the interior and exterior can be efficiently reduced by the dynamic vibration absorbers 26a and 26b.
[0024]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
That is, as described in claim 1, a steel frame is constructed of heavy steel H-shaped steel, and the first floor pillar 12 is erected on the foundation 25, and the first floor through beam 1a is placed on the first floor pillar 12. The second-floor split pillar 15 is erected on the first-floor through-beam 1a, the second-floor through-beam 1b is horizontally installed on the upper end of the second-floor split-pillar 15, and the second-floor through-beam is placed. A split pillar 16 on the third floor is erected on 1b, and a third-floor through beam 1c is installed at the upper end of the third-column split pillar 16 to pass through the first, second, and third floor through beams 1a.・ Land-winning three-story ramen-structured house with 1b and 1c as the main, divided into the first-floor pillar 12, the second-floor pillar 15 and the third-floor pillar 16 and the number of divided pillars is reduced toward the upper floor. in the dynamic vibration reducer 26a · 26b that to reduce the traffic vibrations when placed on the roof 31, if the penthouse or the like is arranged at the position of the center of gravity position G of該屋on 31, the The vibration absorber 26 includes two dynamic vibration absorbers 26a for vibrations in the short direction SD of the house and dynamic vibration absorbers 26b for vibrations in the longitudinal direction LD of the house. In addition, since both the dynamic vibration absorbers 26a and 26b are disposed , even when the dynamic vibration absorber cannot be disposed at the center of gravity, a high vibration damping effect can be exhibited by the pair of dynamic vibration absorbers. Furthermore, the dynamic vibration absorber can be disposed in consideration of the interior and the exterior, and the vibration transmitted from the interior and the exterior can be efficiently reduced by the dynamic vibration absorber.
In addition, it has become possible to absorb the vibrations of the house most efficiently, and it has become possible to provide a house with excellent comfort.
[0025]
Further, in a three-story house composed of a steel frame and mainly composed of beams, a dynamic vibration absorber is disposed at a point-symmetrical position with respect to the center of gravity of the house, so that the dynamic vibration absorbers 26a and 26b are provided. Even if it is configured to absorb only vibrations in one direction, it has become possible to sufficiently absorb short-wave vibrations in which the house is susceptible to vibrations. As a result, it is possible to realize a vibration-resistant structure at a low cost, and it is possible to provide a house that is excellent in comfort and economy.
[0026]
In addition, the dynamic vibration absorber can be arranged to make the best use of the capacity of the dynamic vibration absorber even when the dynamic vibration absorber cannot be disposed at the position of the center of gravity on the rooftop of a house in plan view. It is possible to provide a house with excellent comfort and sufficient vibration-resistant structure without restricting the roof space that can be used for various purposes.
[0027]
Further, in a three-story house composed of a steel frame structure and mainly composed of beams, corresponding dynamic vibration absorbers are arranged on the roof 31 at the top of the house, so that the dynamic vibration absorbers are located at the center of gravity of the house. Even when it is not possible to dispose, a high vibration damping effect can be exhibited by the pair of dynamic vibration absorbers. Furthermore, since a unidirectional dynamic vibration absorber can be used as the dynamic vibration absorber, the cost for construction can be reduced.
[Brief description of the drawings]
FIG. 1 is a bird's-eye view showing a configuration of a three-story house. FIG. 2 is a perspective view showing a structure of a through beam 1a of a house used in the present invention and pillar / beam joints of first-tier pillars 12 and second-tier pillars 15. Figure.
FIG. 3 is a schematic diagram showing how to receive vibration of a house.
FIG. 4 is a schematic diagram showing an operational configuration of a dynamic vibration absorber.
FIG. 5 is a schematic diagram showing a vibration damping mechanism of a dynamic vibration absorber.
FIG. 6 is a perspective view showing a house in which a dynamic vibration absorber is arranged on a rooftop.
FIG. 7 is also a plan view.
FIG. 8 is a perspective view showing a house in which a dynamic vibration absorber is arranged on a rooftop with a penthouse.
FIG. 9 is also a plan view.
FIG. 10 is a perspective view showing a house in which a dynamic vibration absorber is arranged on a primary independent straight line passing through the center of gravity.
FIG. 11 is also a plan view.
FIG. 12 is a perspective view showing a house in which a dynamic vibration absorber is disposed at a point-symmetrical position with respect to the position of the center of gravity.
FIG. 13 is also a plan view.
[Explanation of symbols]
26 Dynamic vibration absorbers 26a and 26b Dynamic vibration absorbers 31 Rooftop 40 Penthouse 41S (Short direction) opening 41L (Longitudinal direction) opening G Center of gravity position LD Longitudinal direction SD Short direction

Claims (1)

A steel frame is composed of heavy steel H-shaped steel, and the first floor pillar 12 is erected on the foundation 25, and the first floor through beam 1a is fixed on the first floor pillar 12, and the first floor through beam is constructed. A split pillar 15 on the second floor is erected on 1a, a through beam 1b on the second floor is installed on the upper end of the split pillar 15 on the second floor, and a split pillar 16 on the third floor is placed on the second beam 1b. Is installed on the upper end of the split pillar 16 on the third floor, and the first floor, the second floor, and the third floor through beams 1a, 1b, and 1c are mainly installed on the first floor. In a three-story ramen-structured house with a beam, the pillars 12, the second-floor pillars 15 and the third-floor pillars 16 are divided and the number of divided pillars is reduced toward the upper floor.
When the dynamic vibration absorbers 26a and 26b for reducing traffic vibration are arranged on the rooftop 31, if a tower or the like is arranged at the position of the center of gravity G of the rooftop 31, the dynamic vibration absorber 26 is arranged in the short direction of the house. The dynamic vibration absorber 26a for SD vibration and the dynamic vibration absorber 26b for vibration in the longitudinal direction LD of the house are two, and the double vibration absorbers 26a and 26b are located at point-symmetrical positions with respect to the gravity center position G of the house. A dynamic vibration absorber for a three-story ramen-structured house with beam winches.

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