JP7220627B2 - Damping structure of building and its construction method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a damping structure of a building and a method of constructing the same, and more particularly to a damping structure suitable for a building having a structure such as a plate-shaped condominium and a method of constructing the same.

Seismic walls are sometimes installed in buildings to improve their seismic performance. In a building such as a plate-shaped apartment building, a partition wall extending in the direction between beams forms an earthquake-resistant wall. In order to improve workability, it is conceivable to use PCa for the partition walls. However, in that case, since pillars are often provided at the four corners of the dwelling unit, the area of the boundary wall becomes large, and the weight of the PCa wall member becomes heavy. In addition, because of the large number of reinforcing bars, it is difficult to use lap joints for vertical bar joints on each floor, and mechanical joints increase costs. Because of these many problems, door boundary walls are generally constructed by cast-in-place.

In addition, as an earthquake-resistant reinforcement structure using the wing wall as an earthquake-resistant wall, a reinforcing wing wall with a plurality of openings is arranged in a part of the structural surface surrounded by the above-mentioned pillars and beams of the building. A structure is known in which, when a horizontal external force is input to a pillar, the reinforcing wing wall breaks before the pillar (Patent Document 1).

On the other hand, in order to improve the damping performance of the building, a damper is sometimes installed in the building. Vibration control dampers include oil dampers, viscous dampers such as viscoelastic dampers, and hysteresis dampers such as steel dampers and lead dampers. Vibration control dampers are installed between the upper and lower floors so as to connect the beams of the upper and lower floors, and are deformed according to the displacement of the upper and lower beams (if there are any parts such as stubs that protrude from the beams) during an earthquake. It is often used as an "interlayer damper" to absorb seismic energy. As an example other than the inter-layer damper, Patent Document 2 discloses that a quake-resistant wall is arranged between the pair of pillars with a certain interval from each pillar, and a viscoelastic damper is provided between the quake-resistant wall and both pillars. is disclosed.

Japanese Patent Application Laid-Open No. 2001-020533 JP 2011-256577 A

However, in the earthquake-resistant reinforcement structure described in Patent Document 1, since the wing wall is provided only on a part of the structural surface surrounded by the columns and beams, the improvement in the earthquake-resistant performance is small. The interlayer damper described in Patent Document 2 does not construct a wall, but is simply an energy absorbing device. getting too big. Also, filling the entire length of the boundary wall with a damper would cost a huge amount of money. Furthermore, if the damper is damaged during an earthquake and repair work is required, the entire boundary wall must be repaired, and the repair work becomes large-scale. On the other hand, in the structure in which a damper is provided between the quake-resistant wall and both columns described in Patent Document 2, the displacement between the quake-resistant wall and the columns is very small, so there is a possibility that the expected damping force may not be exhibited. In addition, in any structure, it is not possible to solve the above-mentioned many problems of PCa walls after applying to a wall such as a partition wall of a plate-shaped apartment building.

In view of such a background, the present invention provides a vibration damping structure for a building that can solve the problems associated with PCa walls and that can reliably exert the expected damping force in the event of an earthquake, and a method for constructing the same. is the subject.

In order to solve such problems, an embodiment of the present invention provides a vibration damping structure (1) for a building, which comprises a pair of RC columns (2) extending horizontally and vertically at different positions. A pair of RC beams (3) rigidly connected to the pair of columns at both ends, and an RC structure provided on a structural surface surrounded by the pair of columns and the pair of beams A wall (4) and a vibration control damper (5) provided on the wall, the wall being arranged on the left side of the structural surface and rigidly joined to the column on the left side and a pair of the A first wall member (6) of PCa concrete having upper and lower ends spaced from the beam and spaced from said first wall member on the right side of said structural surface and rigidly connected to said column on the right side. a second wall member (7) made of PCa concrete having a base end that is flattened and upper and lower ends spaced from a pair of said beams, wherein said vibration damper is connected to said first wall member and said second wall member; and an energy absorbing member (8) joined to the free ends of said first wall member and said second wall member.

With this configuration, the wall is divided into the first wall member and the second wall member, so the weight of each wall member is reduced. Therefore, it is possible to avoid an increase in the size of lifting equipment. In addition, since the energy absorbing member is arranged between the first wall member and the second wall member, the energy absorbing member is placed between the first wall member and the second wall member from above (in a suspended state) or from the front. It can be placed in between, and installation and replacement of the energy absorbing member are easy. Furthermore, since the upper and lower ends of each wall member are spaced apart from the beam, the number of reinforcing bar joints is reduced, and the labor for construction is reduced. In addition, since the upper and lower ends of each wall member are spaced apart from the beam, relative displacement of the free ends of both beam members in the vertical direction increases during an earthquake. Therefore, the energy absorbing member reliably absorbs the vibrational energy, and the expected damping force is reliably exerted during an earthquake.

In the above configuration, the energy absorbing member (8) is made of a fiber-reinforced cement-based composite material, and has a pair of flanges ( 9) and a web (10) joined to said pair of said flanges and absorbing vibrational energy by shear deformation, said pair of flanges connecting the free ends of said first and second wall members. should be concluded with

According to this configuration, the energy absorbing member can be reliably fixed by fastening the pair of flanges to the both wall members. In addition, since the energy absorbing member can be moved in the direction perpendicular to the structural surface when the pair of flanges is not fastened, it is possible to easily replace the damaged energy absorbing member. Furthermore, by adjusting the thickness and length (dimension in the vertical direction) of the flange, the damping force expected of the energy absorbing member can be easily adjusted. In addition, since the energy absorbing member is made of a fiber-reinforced cement-based composite material, the fireproof coating that is required when steel is used is no longer necessary, and it is possible to prevent the wall from becoming thicker and the installation work from increasing. can be done.

In the above configuration, the damping structure (1) of the building is provided between the upper and lower ends of the first wall member (6) and the second wall member (7) and the pair of beams (3). It is preferable to further include an elastic member (14) provided.

According to this configuration, even if the first wall member and the second wall member are separated from the pair of beams, the gap is closed by the elastic member, so it is possible to suppress the deterioration of the soundproofing performance.

In the above configuration, at least one of the first wall member (6) and the second wall member (7) preferably includes a portion rigidly joined to the pair of beams (3) on the base end side.

According to this configuration, part of the first wall member and/or part of the second wall member functions as a seismic wall, and it is possible to improve not only the vibration damping performance of the building but also the seismic performance of the building.

In the above configuration, the wall (4) is spaced between the first wall member (6) and the second wall member (7) with respect to the first wall member and the second wall member. It further has a third wall member (28) made of PCa concrete disposed and rigidly joined to the pair of beams (3), the vibration damper (5) connecting the first wall member and the third wall member (28). a first energy absorbing member (8A) arranged between the wall member and joined to the first wall member and the third wall member; and arranged between the second wall member and the third wall member. and a second energy absorbing member (8B) joined to the second wall member and the third wall member.

According to this configuration, the third wall member functions as a seismic wall, and it is possible to improve not only the vibration damping performance of the building but also the seismic performance of the building. Also, since two energy absorbing members are provided, it is possible to further improve the damping performance of the building.

In the above configuration, the left pillar (2) is composed of a first pillar wall member (31) integrally formed with the first wall member (6) by PCa concrete, and the right pillar is made of PCa concrete. It is good to be comprised by the 2nd wall member (7) and the 2nd column wall member (32) integrally formed.

According to this configuration, not only the first wall member and the second wall member but also the pair of pillars are made of PCa, so that the construction speed of the building can be increased and the construction period can be shortened.

In order to solve the above problems, an embodiment of the present invention is a method for constructing a damping structure (1) for a building, which has a plurality of first joint reinforcing bars (17) protruding from the left end surface, 1 A first wall member (6) made of PCa concrete to be placed on the left side of the structure surrounded by a pair of pillars (2) and a pair of beams (3), and a plurality of second wall members protruding from the right end face Preparing a second wall member (7) of PCa concrete to be placed on the right side of said framing surface with joint rebars (19); a step of arranging the first wall member so that the lower end is spaced from the beam above (FIGS. 6A and 6B); arranging the second wall member so that the lower end is spaced from the beam and with a space from the first wall member (FIGS. 6(C) and 7(D)); placing an energy absorbing member (8) between the first wall member and the second wall member (FIGS. 7(E) and (F)); joining the two wall members (FIG. 8(G)); placing concrete so as to bury the first joint reinforcing bar and the second joint reinforcing bar; constructing a pair of rigidly joined pillars (FIGS. 8(H) and (I)); and placing concrete away from the upper ends of the first and second wall members , constructing an upper beam (FIGS. 8(H), (I)) whose ends are rigidly connected to a pair of said columns.

With this configuration, the wall is divided into the first wall member and the second wall member, so the weight of each wall member is reduced. Therefore, it is possible to avoid an increase in the size of lifting equipment. In addition, since the upper and lower ends of each wall member are spaced apart from the beam, the number of reinforcing bar joints is reduced and the labor for construction is reduced. Furthermore, since the energy absorbing member can be arranged in a suspended state between the first wall member and the second wall member from above, installation of the energy absorbing member is easy.

In order to solve the above problems, an embodiment of the present invention is a construction method of a damping structure (1) for a building, which is surrounded by a pair of columns (2) and a pair of beams (3) A first wall member (6) to be arranged on the left side of the structural surface and a column are formed integrally with a first column wall member (31) made of PCa concrete, and a second wall member (31) to be arranged on the right side of the structural surface. A second column wall member (32) made of PCa concrete in which the wall member (7) and the column are integrally formed, and a third wall made of PCa concrete to be arranged in the middle part in the width direction of the structural surface. providing a member (28); placing the first column wall member in position so that the lower end of the first wall member is spaced from the lower beam and the lower end of the column to the lower column; rigidly joining the lower end of the column to the lower column by placing the second column wall member in a predetermined position so that the lower end of the second wall member is spaced apart from the lower beam ( 14(A)), a first energy absorbing member (8A) is joined to the free end of the first wall member, and a second energy absorbing member (8B) is joined to the free end of the second wall member. The third wall member is arranged between the step (FIGS. 14(B) to 15(D)) and the first energy absorbing member and the second energy absorbing member, and the lower end of the third wall member is The step of rigidly joining to the lower beam (FIGS. 15(E) to 15(F)) and the step of joining the third wall member to the first energy absorbing member and the second energy absorbing member (FIG. 16) (G)) and constructing the upper beam such that the upper ends of the first and second wall members are spaced apart and the upper ends of the third wall member are rigidly connected (Fig. 16(H), (I)).

With this configuration, the wall is divided into the first wall member, the second wall member, and the third member, so the weight of the third wall member is reduced. In addition, since not only each wall member but also a pair of pillars are made of PCa, the construction speed of the building can be increased and the construction period can be shortened. Furthermore, since the upper and lower ends of the first wall member and the second wall member are spaced apart from the beam, the number of reinforcing bar joints is reduced, and the labor for construction is reduced. In addition, since each energy absorbing member and the third wall member can be arranged in a predetermined position from above in a suspended state, installation of these members is easy.

Thus, according to the present invention, it is possible to provide a damping structure for a building that can solve the problems associated with the use of PCa walls and that can reliably exert the expected damping force in the event of an earthquake, and a construction method for this building. can be done.

The front view of the damping structure of the building which concerns on 1st Embodiment II-II sectional view in Fig. 1 A diagram showing an example of a cross section of the energy absorbing member shown in FIG. Front view schematically showing the behavior of the damping structure shown in Fig. 1 during an earthquake The figure which shows the modification of the fastening part of the energy absorption member shown in FIG. Explanatory drawing of the construction procedure of the damping structure shown in Fig. 1 Explanatory drawing of the construction procedure of the damping structure shown in Fig. 1 Explanatory drawing of the construction procedure of the damping structure shown in Fig. 1 Front view of damping structure for building according to second embodiment Front view of damping structure for building according to third embodiment Front view of damping structure for building according to fourth embodiment XII-XII sectional view in FIG. Front view schematically showing the behavior of the damping structure shown in FIG. 11 during an earthquake Explanatory drawing of the construction procedure of the damping structure shown in FIG. Explanatory drawing of the construction procedure of the damping structure shown in FIG. Explanatory drawing of the construction procedure of the damping structure shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<<First Embodiment>>
First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. As shown in FIGS. 1 and 2, the building provided with the damping structure 1 is a reinforced concrete multi-layered building constructed with a Rahmen structure, and is used, for example, as a plate-like condominium. The building consists of a plurality of pillars 2 arranged in two columns in the beam direction (horizontal direction in Fig. 1) and multiple columns in the girder direction (perpendicular to the paper surface of Fig. 1). and a plurality of beams 3 bridging a pair of pillars 2 adjacent to each other. Hereinafter, the inter-beam direction is referred to as left and right.

The damping structure 1 of the building consists of a pair of left and right reinforced concrete columns 2 arranged in the inter-beam direction, and a pair of upper and lower columns extending left and right at different positions vertically and rigidly joined to the pair of columns 2 at both ends. is provided on the structural surface surrounded by the RC beams 3. This structural surface forms a boundary between two adjacent dwelling units on the floor, and is closed by a boundary wall. The door boundary wall is composed of an RC wall 4 and interior materials (boards, wallpaper, etc.) (not shown) provided on both sides of the wall 4 . A vibration damper 5 is provided on the wall 4 , and a vibration damping structure 1 is composed of a pair of pillars 2 and a pair of beams 3 that define a structural surface, the wall 4 , and the vibration damper 5 .

The wall 4 includes a first wall member 6 made of PCa concrete arranged on the left side of the structural surface and a second wall member 7 made of PCa concrete arranged on the right side of the structural surface. The first wall member 6 and the second wall member 7 have a height smaller than the vertical inter-beam dimension and have the same length (width). The total length of the first wall member 6 and the second wall member 7 is smaller than the distance between the left and right columns by a predetermined length L1. The first wall member 6 has a base end (left end) rigidly joined to the left column 2 , upper and lower ends separated from the pair of beams 3 , and a free end (right end) facing the second wall member 7 . have. The second wall member 7 has a base end (right end) rigidly joined to the right column 2 , upper and lower ends separated from the pair of beams 3 , and a free end (left end) facing the first wall member 6 . have.

The vibration damper 5 is disposed between the first wall member 6 and the second wall member 7 and includes an energy absorbing member 8 joined to the free ends of the first wall member 6 and the second wall member 7. . The energy absorbing member 8 is an elongated member made of a fiber-reinforced cementitious composite material and having a uniform cross-sectional shape in the vertical direction, and extends in the vertical direction. The energy absorbing member 8 has the same width as the predetermined dimension L1 between the free ends of the first wall member 6 and the second wall member 7, and the same height as the free ends of the first wall member 6 and the second wall member 7. It has a height (extending direction length).

Fiber-reinforced cementitious composite materials are obtained by mixing short fibers such as carbon fibers, aramid fibers, glass fibers, vinylon fibers, polypropylene fibers and steel fibers as reinforcing materials into cementitious materials such as concrete and mortar. The fiber-reinforced cementitious composite material may be fiber-reinforced concrete, fiber-reinforced mortar, or may further contain a reinforcing material other than short fibers. Compared to conventional ordinary concrete, fiber-reinforced cement-based composite materials have the characteristics of superior apparent tensile strength and tensile toughness due to the dispersion of cracks during tension and the constraining of crack opening by fibers. ing.

As shown in FIG. 2, the energy absorbing member 8 is joined at both ends to a pair of flanges 9 abutting the free ends of the first wall member 6 and the second wall member 7. a web 10; A pair of flanges 9 are fastened by a plurality of bolts 11 to the free end surfaces of the corresponding first wall member 6 and second wall member 7 . Although not shown, insert nuts for screwing bolts 11 are embedded in the free ends of the first wall member 6 and the second wall member 7 . The web 10 has a constant width, extends parallel to the structural surface and connects a pair of flanges 9 . The shear deformation of the web 10 is caused by the relative displacement of the pair of flanges 9 in the vertical direction, and the vibration energy is absorbed by the shear deformation of the web 10 .

FIG. 3 is a diagram showing an example of a cross section of the energy absorbing member 8 shown in FIG. The energy absorbing member 8 may be formed in various cross-sectional shapes as shown in FIG. FIG. 3(A) shows the energy absorbing member 8 shown in FIG. In this example, both ends of web 10 are joined to the center of a pair of flanges 9 . In the example of FIG. 3B, a pair of fillets 12 (fillets) are formed on both sides of the joint between the web 10 and each flange 9 . In the example of FIG. 3(C), reinforcing steel bars 13 are embedded inside the pair of flanges 9 . In the example of FIG. 3D, both ends of the web 10 are joined to the ends of the pair of flanges 9 on one side. In the example of FIG. 3(E), the web 10 extends obliquely with respect to a line perpendicular to the pair of flanges 9 . The cross section of the energy absorbing member 8 may combine these features. Furthermore, the cross-section of the energy absorbing member 8 is not limited to that shown here, and may have other features.

Thus, the shape of the energy absorbing member 8 can be freely determined by being made of the fiber-reinforced cement-based composite material. Further, by adjusting the thickness and length (dimension in the vertical direction) of the flange 9, the damping force expected of the energy absorbing member 8 can be easily adjusted.

As shown in FIG. 1, between the upper end of the first wall member 6 and the second wall member 7 and the upper beam 3 and between the lower end of the first wall member 6 and the second wall member 7 and the lower beam 3 An elastic member 14 is arranged between each. The elastic member 14 is provided so as to close the gap formed in the wall 4, and when the free ends of the first wall member 6 and the second wall member 7 are displaced vertically relative to the upper and lower beams 3 during an earthquake, the beams It functions as a cushioning material that mitigates the collision with 3. The elastic member 14 also functions as a sound insulation member that enhances the sound insulation of the wall 4 . Thereby, even if the 1st wall member 6 and the 2nd wall member 7, and one pair of beams 3 are spaced apart, the fall of soundproofing performance is suppressed. Although the elastic member 14 is not provided between the energy absorbing member 8 and the upper and lower beams 3 in the illustrated example, the elastic member 14 may also be provided above and below the energy absorbing member 8 in another example.

FIG. 4 is a front view schematically showing the behavior of the damping structure 1 shown in FIG. 1 during an earthquake. When the building shakes in the direction between the beams due to an earthquake or wind, the pair of pillars 2 tilt in the same direction, the first wall member 6 follows the deformation of the left pillar 2 and rotates as a rigid body, and the second wall member 7 rotates to the right. The building is deformed so as to rotate as a rigid body following the deformation of the pillar 2. As a result, the pair of flanges 9 of the energy absorbing member 8 are relatively displaced in the vertical direction, and the web 10 is deformed. In other words, the web 10 cracks due to the shear force acting in the extension direction (vertical direction), the tensile force acts on the fibers in the web 10, and the seismic energy (vibration energy in the inter-beam direction) is absorbed, that is, damped. exert power. This reduces the shaking of the building and improves the damping performance of the building.

At this time, since the upper and lower ends of the first wall member 6 and the second wall member 7 are provided apart from the beam 3, the upper and lower ends of the first wall member 6 and the second wall member 7 are fixed to the beam 3. Relative displacement in the vertical direction of the free ends of the first wall member 6 and the second wall member 7 becomes greater during an earthquake than in the case where the wall members 7 and 7 are separated from each other. Therefore, the energy absorbing member 8 reliably absorbs the vibrational energy, and the expected damping force is reliably exerted in the event of an earthquake.

Also, if the energy absorbing member 8 is damaged due to the absorption of vibration energy, after releasing the fastening with the bolt 11, the energy absorbing member 8 is moved in the direction orthogonal to the structure surface and removed, and replaced with a new energy absorbing member 8. can be easily replaced. At this time, since the width of the energy absorbing member 8 is small, the range in which the interior material is removed can be made small. Therefore, the replacement work of the energy absorbing member 8 is easy.

In this manner, a large shearing force acts on the energy absorbing member 8 to vertically displace the pair of flanges 9 . On the other hand, the dimensional change between the free ends of the first wall member 6 and the second wall member 7 is small, and the force acting on the energy absorbing member 8 in the opposing direction of the pair of flanges 9 is small. Therefore, the pair of flanges 9 are fastened to the first wall member 6 and the second wall member 7 not by bolts 11 but by grout 15 (filler) filled between them as shown in FIG. may be broken. In this case, the free end surfaces of the first wall member 6 and the second wall member 7 and the outer surfaces of the pair of flanges 9 are preferably formed with a plurality of recesses 16 as shear keys.

Next, a method for constructing the damping structure 1 for a building configured in this manner will be described. For construction, a first wall member 6 and a second wall member 7 made of PCa concrete are prepared in advance. As shown in FIG. 6A, the first wall member 6 has a plurality of first joint reinforcing bars 17 protruding from the left end face on the base end side joined to the column 2 . Elastic members 14 are attached in advance to the upper and lower ends of the first wall member 6 . Around the framing plane, the lower beams 3 have already been constructed and the pair of columns 2 have not yet been constructed, but the column rebars 18 have been erected. The first wall member 6 is lifted by a crane, suspended from above the structure surface at an intermediate position in the width direction of the structure surface, and then slid to the left to reach a predetermined position shown in FIG. 6(B). placed in

As shown in FIG. 6C, the second wall member 7 has a plurality of second joint reinforcing bars 19 protruding from the right end surface on the base end side joined to the column 2 . Elastic members 14 are also attached in advance to the upper and lower ends of the second wall member 7 . The second wall member 7 is lifted by a crane and suspended from above the structural surface at an intermediate position in the width direction of the structural surface. At this time, since the total length of the first wall member 6 and the second wall member 7 is smaller than the distance between the left and right columns by the predetermined length L1, the second joint reinforcing bar 19 does not interfere with the right column reinforcing bar 18. The second wall member 7 can be suspended. After that, the second wall member 7 is slid to the right to be arranged at a predetermined position shown in FIG. 7(D). A gap having a predetermined dimension L1 is formed between the first wall member 6 and the second wall member 7 .

In this way, the wall 4 is divided into the first wall member 6 and the second wall member 7, which are PCa members. is lighter in weight. This avoids the need for oversized lifting equipment.

Subsequently, as shown in FIG. 7(E), the energy absorbing member 8 is lifted by a crane and suspended between the first wall member 6 and the second wall member 7 from above the structural surface, F) is placed at a predetermined position. A pair of flanges 9 of the energy absorbing member 8 face the free ends of the first wall member 6 and the second wall member 7 substantially without gaps, and the free ends of the first wall member 6 and the second wall member 7 abut. As shown in FIG. 8G, the energy absorbing member 8 is fixed by fastening a pair of flanges 9 to the free ends of the first wall member 6 and the second wall member 7 with a plurality of bolts 11. .

Since the energy absorbing member 8 is arranged between the first wall member 6 and the second wall member 7 in this way, the first wall member 6 and the second wall member 7 are arranged from above while the energy absorbing member 8 is suspended. and the energy absorbing member 8 can be easily installed. Also, since the energy absorbing member 8 has a pair of flanges 9 that contact the free ends of the first wall member 6 and the second wall member 7 , the pair of flanges 9 are arranged between the first wall member 6 and the second wall member 7 . The energy absorbing member 8 can be securely fixed by fastening to. Also, the energy absorbing member 8 can be securely fastened to the first wall member 6 and the second wall member 7 by the pair of flanges 9 .

Subsequently, as shown in FIG. 8(H), the upper beam reinforcing bars 20 are assembled, and the formwork (not shown) for the pair of columns 2 and the upper beam 3 is assembled. A pair of columns 2 and an upper beam 3 are constructed by pouring concrete into the formwork. The first wall member 6 is rigidly joined to the left column 2, and the second wall member 7 is rigidly joined to the right column 2. As shown in FIG. The upper ends of the first wall member 6 and the second wall member 7 are separated from the beam 3 on the upper side. As a result, the damping structure 1 having the configuration described above is constructed. The formwork will be dismantled and removed after the strength of the concrete is developed.

In this way, since the first wall member 6 and the second wall member 7 have upper and lower ends separated from the upper and lower beams 3, the vertical bars of the first wall member 6 and the second wall member 7 are attached to the upper and lower beams 3. There is no need to connect, and the number of reinforcing bar joints is reduced compared to the case of connecting to the upper and lower beams 3 via reinforcing bar joints. Therefore, the labor for construction is reduced, and the construction work is simple.

In addition, since the energy absorbing member 8 is made of a fiber-reinforced cement-based composite material, a fireproof coating that is required when steel is used is not necessary, and it is possible to suppress the wall 4 from becoming thicker and the installation labor from increasing. ing.

<<Second embodiment>>
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code|symbol is attached|subjected to 1st Embodiment and the same or the element with the same form or a function, and the overlapping description is abbreviate|omitted.

In this embodiment, the vibration control damper 5 is composed of a plurality of energy absorbing members 8 arranged in the vertical direction. Each energy absorbing member 8 is different in that its height (extending direction length) is shorter than that of the first embodiment, and other points are the same as those of the first embodiment. The plurality of energy absorbing members 8 are arranged apart from each other. In other embodiments, multiple energy absorbing members 8 may be arranged substantially contiguous and continuous.

By configuring the vibration control damper 5 in such a manner, the weight of each energy absorbing member 8 is reduced, and handling such as installation, removal, and transportation is facilitated.

<<Third Embodiment>>
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, the same code|symbol is attached|subjected to 1st Embodiment and the same or the element with the same form or a function, and the overlapping description is abbreviate|omitted.

In this embodiment, the configurations of the first wall member 6 and the second wall member 7 are different from those in the first embodiment. The first wall member 6 has a stepped upper end and a lower end so as to include a portion rigidly joined to the upper and lower beams 3 in the vicinity of the pillar 2 on the base end side (that is, on the left side). The second wall member 7 has stepped upper and lower ends so as to include a portion rigidly joined to the pair of beams 3 on the base end side (that is, near the right column 2). Upper joint reinforcing bars 21 and lower joint reinforcing bars 22 of vertical wall reinforcement are provided at rigid joints between the first wall member 6 and the second wall member 7 and the upper and lower beams 3 .

The lower joint reinforcing bar 22 is provided integrally with, for example, the first wall member 6 or the second wall member 7 so as to extend downward. In this case, the lower joint reinforcing bar 22 is placed at a predetermined position with part of the concrete of the lower beam 3 left unplaced, and is integrated with the beam 3 by placing concrete in this portion later. be made. Alternatively, the lower joint reinforcing bar 22 may be provided integrally with one of the first wall member 6 or the second wall member 7 and the beam 3, and the other may be provided with a mechanical joint to join them together. For example, the upper joint reinforcing bar 21 is provided integrally with the first wall member 6 or the second wall member 7 so as to extend upward, and is integrally formed with the beam 3 by pouring the concrete of the upper beam 3. may be

In this embodiment, the first wall member 6 and the second wall member 7 include portions that are rigidly joined to the pair of beams 3 on the proximal side, whereby the first wall member 6 is partly And part of the second wall member 7 functions as a seismic wall. Therefore, not only the damping performance of the building but also the seismic performance of the building is improved. This effect can be obtained if at least one of the first wall member 6 and the second wall member 7 is provided with a portion rigidly joined to the beam 3 .

<<Fourth Embodiment>>
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 11 to 16. FIG. In addition, the same code|symbol is attached|subjected to 1st Embodiment and the same or the element with the same form or a function, and the overlapping description is abbreviate|omitted.

As shown in FIGS. 11 and 12, the wall 4 of this embodiment includes a first wall member 6 arranged on the left side of the structural surface and a second wall member 7 arranged on the right side of the structural surface. It includes a third wall member 28 of PCa concrete located midway across the width of the face. The first wall member 6 and the second wall member 7 are different in length (width) from those of the first embodiment, and other points are the same as those of the first embodiment. However, the first wall member 6 is formed integrally with the left pillar 2 from PCa concrete. Hereinafter, this is referred to as the first column wall member 31 . The second wall member 7 is formed integrally with the right pillar 2 with PCa concrete. Hereinafter, this is referred to as a second column wall member 32 . The third wall member 28 is arranged between the first wall member 6 and the second wall member 7 with a predetermined distance L1 from each of the first wall member 6 and the second wall member 7. It is rigidly connected to the beam 3. At rigid joints between the third wall member 28 and the upper and lower beams 3, the upper joint reinforcing bars 21 and the lower joint reinforcing bars 22 of the wall vertical bars are provided, as in the third embodiment.

The vibration control damper 5 is composed of a first energy absorbing member 8A disposed between and joined to the first wall member 6 and the third wall member 28, and the second wall member 7 and the third wall member 28. and a second energy absorbing member 8B disposed therebetween and joined thereto. The first energy absorbing member 8A and the second energy absorbing member 8B are similar to the energy absorbing member 8 of the first embodiment.

FIG. 13 is a front view schematically showing the behavior of the damping structure 1 shown in FIG. 11 during an earthquake. When the building shakes in the direction between the beams due to an earthquake or wind, the pair of pillars 2 tilt in the same direction, the first wall member 6 follows the deformation of the left pillar 2 and rotates as a rigid body, and the second wall member 7 rotates to the right. The building is deformed so as to rotate as a rigid body following the deformation of the pillar 2. Since the third wall member 28 is rigidly joined to the upper and lower beams 3, it functions as a seismic wall and inclines in the same direction as the left and right columns 2. As a result, the pair of flanges 9 of the two energy absorbing members 8 are relatively displaced in the vertical direction, the web 10 is deformed, and the seismic energy (vibrational energy in the inter-beam direction) is absorbed. This reduces the shaking of the building and improves the damping performance of the building. Moreover, since the third wall member 28 functions as an earthquake-resistant wall, not only the vibration damping performance of the building but also the earthquake-resistant performance of the building is improved. Furthermore, since two energy absorbing members 8 are provided, the damping performance of the building is further improved.

Also in this embodiment, since the upper end and the lower end of the first wall member 6 and the second wall member 7 are provided apart from the beam 3, the first wall member 6 and the second wall member 7 are more likely to be damaged during an earthquake than when they are fixed to the beam 3. The vertical relative displacement of the free ends of the member 6 and the second wall member 7 increases. Therefore, the energy absorbing member 8 reliably absorbs the vibrational energy, and the expected damping force is reliably exerted in the event of an earthquake.

Next, a method for constructing the damping structure 1 for a building configured in this manner will be described. In construction, the first column wall member 31, the second column wall member 32 and the third wall member 28 made of PCa concrete are prepared in advance. As shown in FIG. 14(A), the lower beam 3 has already been constructed around the structural surface, and the pair of pillars 2 has not yet been constructed. Since the column 2 is made of PCa in this embodiment, a mechanical joint is used for the joint of the column main reinforcement 33 . That is, a mechanical joint is embedded in one of the lower end of the column 2 of the first column wall member 31 and the second column wall member 32 and the upper end of the column 2 of the lower floor, and the column main reinforcement 33 joined to this protrudes in the other. is provided as follows. The first column wall member 31 and the second column wall member 32 are lifted by a crane, placed at the predetermined position shown in FIG. 14(A), and the column 2 is rigidly joined to the column 2 on the lower floor. The lower ends of the first wall member 6 and the second wall member 7 are separated from the lower beam 3 .

Subsequently, as shown in FIG. 14B, the first energy absorbing member 8A is lifted by a crane and suspended from above a predetermined position. Also, the second energy absorbing member 8B is lifted by a crane and suspended from above a predetermined position. The first energy absorbing member 8A and the second energy absorbing member 8B are arranged at predetermined positions as shown in FIG. 14(C). 15(D), one (left) flange 9 of the first energy absorbing member 8A is fastened to the free end of the first wall member 6 with a bolt 11, and the free end of the second wall member 7 is , one (right) flange 9 of the second energy absorbing member 8B is fastened. A gap having substantially the same size as the length of the third wall member 28 is formed between the first energy absorbing member 8A and the second energy absorbing member 8B.

Subsequently, as shown in FIG. 15(E), the third wall member 28 is lifted by a crane and suspended from above a predetermined position. The third wall member 28 is arranged at a predetermined position between the first energy absorbing member 8A and the second energy absorbing member 8B, as shown in FIG. spliced. The third wall member 28 is attached to the other (right) flange 9 of the first energy absorption member 8A and the other (left) flange 9 of the second energy absorption member 8B by bolts 11, as shown in FIG. 16(G). be concluded.

Subsequently, as shown in FIG. 16(H), the upper beam reinforcing bars 20 are assembled, and the formwork (not shown) for the upper beam 3 is assembled. The upper beam 3 is constructed by placing concrete in the formwork. The upper ends of the first wall member 6 and the second wall member 7 are separated from the beam 3 on the upper side. On the other hand, the upper end of the third wall member 28 is rigidly joined to the beam 3 on the upper side. As a result, the damping structure 1 having the configuration described above is constructed.

In this way, not only each wall member but also a pair of pillars 2 are made of PCa, so that the construction speed of the building can be increased and the construction period can be shortened. In addition, since the first wall member 6 and the second wall member 7 have upper and lower ends separated from the upper and lower beams 3, only the vertical bars of the third wall member 28 need to be connected to the upper and lower beams 3, and the reinforcing bar joints decrease in the number of Therefore, the labor for construction is reduced, and the construction work is simple. Furthermore, since the energy absorbing member 8 and the third wall member 28 can be placed at predetermined positions from above in a suspended state, these members can be easily installed.

Although the specific embodiments have been described above, the present invention is not limited to the above embodiments and can be widely modified. For example, in the third embodiment, the first wall member 6 is formed integrally with the left pillar 2, and the second wall member 7 is formed integrally with the right pillar 2 and is made of PCa concrete. The member 6 and the second wall member 7 and the column 2 may be configured as separate members. In this case, the column 2 may be constructed of cast-in-place concrete, thereby eliminating the need for mechanical joints to connect the wall 4 and the column 2 . In addition, the specific configuration, arrangement, quantity, material, angle, construction procedure, etc. of each member and part can be changed as appropriate within the scope of the present invention. Further, the above embodiments and modifications can be combined as appropriate. On the other hand, not all of the components shown in the above embodiments are essential, and can be selected as appropriate.

1 damping structure 2 pillar 3 beam 4 wall 5 damper 6 first wall member 7 second wall member 8 energy absorbing member 8A first energy absorbing member 8B second energy absorbing member 9 flange 10 web 14 elastic member 17 first first wall member Joint reinforcement 19 Second joint reinforcement 28 Third wall member 31 First column wall member 32 Second column wall member

Claims (8)

A damping structure for a building,
A pair of RC pillars,
a pair of RC beams extending left and right at different positions vertically and rigidly joined to the pair of pillars at both ends;
an RC wall provided on a structural surface surrounded by the pair of pillars and the pair of beams;
A vibration damper provided on the wall,
a first wall member made of PCa concrete, the wall member being disposed on the left side of the structural surface and having a base end rigidly joined to the left column and upper and lower ends separated from the pair of beams; A second wall member made of PCa concrete spaced from said first wall member on the right side of the face and having a base end rigidly joined to said right column and upper and lower ends spaced from said pair of beams. a wall member;
The vibration damper includes an energy absorbing member disposed between the first wall member and the second wall member and joined to free ends of the first wall member and the second wall member. Vibration control structure of the building. The energy-absorbing member is made of a fiber-reinforced cementitious composite material, and is joined to a pair of flanges abutting the free ends of the first wall member and the second wall member, and to the pair of flanges by shear deformation. 2. A building restraint according to claim 1, further comprising a web for absorbing vibrational energy, and wherein a pair of said flanges are fastened to the free ends of said first and second wall members. vibration structure. 3. The elastic member according to claim 1, further comprising an elastic member provided between the upper end and the lower end of the first wall member and the second wall member and the pair of beams. damping structure of the building. At least one of the first wall member and the second wall member includes a portion rigidly joined to the pair of beams on the base end side. Damping structure of the stated building. The wall is spaced between the first wall member and the second wall member and rigidly joined to the pair of beams. further comprising a third wall member made of PCa concrete;
The vibration damper is disposed between the first wall member and the third wall member, a first energy absorbing member joined to the first wall member and the third wall member, and the second wall and a second energy absorbing member disposed between the member and the third wall member and joined to the second wall member and the third wall member. A damping structure for the building according to any one of the above. The pillar on the left side is composed of a first pillar wall member integrally formed with the first wall member of PCa concrete, and the pillar on the right side is a second pillar integrally formed with the second wall member of PCa concrete. 6. The vibration damping structure for a building according to claim 5, wherein the damping structure is composed of wall members. A method for constructing a damping structure for a building, comprising:
A first wall member made of PCa concrete, which has a plurality of first joint reinforcing bars protruding from the left end surface and is to be arranged on the left side of the structural surface surrounded by a pair of columns and a pair of beams, and a right end surface. providing a second wall member made of PCa concrete to be positioned on the right side of the structural surface and having a plurality of second joint rebars protruding from;
arranging the first wall member on the left side of the structure surface on the lower beam so that the lower end is spaced from the beam;
disposing the second wall member on the right side of the structural surface above the lower beam so that the lower end is spaced from the beam and spaced from the first wall member; ,
disposing an energy absorbing member between the first wall member and the second wall member, and joining the energy absorbing member to the first wall member and the second wall member;
placing concrete so as to embed the first joint reinforcing bars and the second joint reinforcing bars, and constructing a pair of the columns rigidly connected to the first wall member and the second wall member;
placing concrete spaced apart from the upper ends of the first wall member and the upper ends of the second wall members and constructing an upper beam rigidly connected at both ends to the pair of pillars. A method of constructing a damping structure for a building. A method for constructing a damping structure for a building, comprising:
A first column wall member made of PCa concrete in which the column and the first wall member to be placed on the left side of the structural surface surrounded by the pair of columns and the pair of beams are integrally formed, and the right side of the structural surface A second column wall member made of PCa concrete in which the second wall member and the column to be arranged are integrally formed, and a third made of PCa concrete to be arranged in the middle part in the width direction of the structure surface providing a wall member;
The first column wall member is placed at a predetermined position so that the lower end of the first wall member is separated from the lower beam, and the lower end of the column is rigidly joined to the lower column, and the second wall member is provided. placing the second column wall member in a predetermined position such that the lower end is spaced apart from the lower beam, and rigidly joining the lower end of the column to the lower column;
joining a first energy absorbing member to the free end of the first wall member and joining a second energy absorbing member to the free end of the second wall member;
disposing the third wall member between the first energy absorbing member and the second energy absorbing member, and rigidly joining the lower end of the third wall member to the lower beam;
joining the third wall member to the first energy absorbing member and the second energy absorbing member;
and constructing the upper beam such that the upper ends of the first wall member and the upper ends of the second wall member are spaced apart and the upper ends of the third wall member are rigidly connected. A construction method for damping structure of a building.

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