Building and building construction method

Abstract

To provide a building and a building construction method, even when a lower floor device and an upper floor device are positioned in a misaligned relationship in plan view, that can connect each device to a common anchor portion in a stable state.SOLUTION: Anchor bolts 20 are buried in concrete beams 15 at the boundary between upper and lower floors of a building. A damping device 17A in the lower floor section 11A is connected to an anchor lower portion 21 with the anchor lower portion 21 of the anchor bolt 20 inserted through an insertion hole 19a, and a damping device 17B in the upper floor section 11B is connected to an anchor upper portion 22 with the anchor upper portion 22 of the anchor bolt 20 inserted through an insertion hole 18a. An upwardly opening recess portion 41 is formed in the concrete beam 15. The anchor bolt 20 includes bent sections 43, 44 bent in the recess portion 41, by which the insertion holes 19a of the damping device 17A and the insertion holes 18a of the damping device 17B are located at different positions in plan view.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a building and a building construction method.

Background Art

[0002] In a multi-story building made of reinforced concrete (RC structure), a concrete beam is provided at the boundary between the lower floor and the upper floor adjacent to each other vertically. When a vibration control device for suppressing the vibration of the building is installed in such a building, the vibration control device is fixed to the above-mentioned concrete beam via anchor bolts (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When vibration control devices are installed in the lower floor and the upper floor of a building respectively, it is conceivable that these vibration control devices are fixed to the above-mentioned concrete beam via common anchor bolts. In this case, the anchor bolts are embedded in the concrete beam in a state of penetrating the concrete beam vertically. Further, insertion holes for inserting the anchor bolts are formed in the vibration control device on the lower floor side (hereinafter referred to as the lower floor side device) and the vibration control device on the upper floor side (hereinafter referred to as the upper floor side device), and the lower floor side device and the upper floor side device are connected to the anchor bolts in a state of inserting the anchor bolts through the insertion holes respectively.

[0005] Here, in the above configuration, it is assumed that due to the construction accuracy of the lower floor part and the upper floor part, and the accuracy of the members connected to the lower floor part and the upper floor part, etc., the lower floor side device and the upper floor side device may be arranged in a positional relationship shifted in plan view. In that case, the insertion holes of the lower floor side device and the upper floor side device will be located at positions shifted in plan view. Therefore, in such a case, there is a possibility that an anchor bolt cannot be inserted through the insertion holes of the lower floor side device and the upper floor side device, and as a result, there is a possibility that the lower floor side device and the upper floor side device cannot be connected by the anchor bolts.

[0006] Therefore, in view of such a point, it is conceivable to form the insertion holes of each vibration damping device larger in advance. By doing so, even if the insertion holes of the lower floor side device and the upper floor side device are located at positions shifted in plan view, an anchor bolt can be inserted through each of those insertion holes. Therefore, the lower floor side device and the upper floor side device can be connected to the anchor bolts in the inserted state.

[0007] However, if the insertion holes of the lower floor side device and the upper floor side device are made larger, there is a possibility that the lower floor side device and the upper floor side device cannot be connected to the anchor bolts in a stable state.

[0008] Moreover, such a problem can occur not only when the lower floor side device and the upper floor side device are vibration damping devices, but also when they are other devices such as storage devices.

[0009] The present invention has been made in view of the above circumstances, and the main object is to provide a building and a construction method of a building capable of stably connecting each of those devices to a common anchor part even when the lower floor side device and the upper floor side device are arranged in a positional relationship shifted in plan view.

Means for Solving the Problems

[0010] In order to solve the above problems, the building of the first invention includes a concrete beam provided at the boundary between a lower floor part and an upper floor part adjacent to each other vertically, an anchor part embedded in the concrete beam in a state of penetrating the concrete beam vertically, a lower floor side device installed in the lower floor part, and an upper floor side device installed in the upper floor part. The anchor part has an anchor lower part exposed on the lower surface side of the concrete beam and an anchor upper part exposed on the upper surface side of the concrete beam. The lower floor side device has a first insertion hole through which the anchor lower part is inserted, and is connected to the anchor lower part in a state where the anchor lower part is inserted through the first insertion hole. The upper floor side device has a second insertion hole through which the anchor upper part is inserted, and is connected to the anchor upper part in a state where the anchor upper part is inserted through the second insertion hole. A recess opened upward or downward is formed in the concrete beam. The anchor part extends vertically through the recess and has a bent part bent in the recess. Since the anchor part has the bent part, the anchor lower part and the anchor upper part are located at different positions in plan view.

[0011] According to the first invention, an anchor part is embedded in a concrete beam provided at the boundary between a lower floor part and an upper floor part. The anchor part has an anchor lower part exposed on the lower surface side of the concrete beam and an anchor upper part exposed on the upper surface side of the concrete beam. The lower floor side device is connected to the anchor lower part in a state where the anchor lower part is inserted through the first insertion hole thereof, and the upper floor side device is connected to the anchor upper part in a state where the anchor upper part is inserted through the second insertion hole thereof. A recess opened upward or downward is formed in the concrete beam. The anchor part extends vertically through the recess and has a bent part bent in the recess. And because the anchor part has the bent part, the anchor lower part and the anchor upper part are located at different positions in plan view.

[0012] According to such a configuration, even when, during on-site construction, due to construction accuracy of the lower floor part and the upper floor part, etc., the lower floor side device and the upper floor side device are arranged in a positional relationship shifted in plan view, that is, even when the first insertion hole of the lower floor side device and the second insertion hole of the upper floor side device are located at shifted positions in plan view, by bending and deforming the anchor part in the concave part according to the shift (that is, by forming a bent part in the anchor part), the lower part of the anchor can be positioned at a position corresponding to the first insertion hole of the lower floor side device, and the upper part of the anchor can be positioned at a position corresponding to the second insertion hole of the upper floor side device. Thereby, even if the first insertion hole and the second insertion hole are not formed large, the lower part of the anchor can be inserted into the first insertion hole, and the upper part of the anchor can be inserted into the second insertion hole. And in such an inserted state, the lower floor side device can be connected to the lower part of the anchor, and the upper floor side device can be connected to the upper part of the anchor. Therefore, in this case, the lower floor side device and the upper floor side device can be connected to the common anchor part in a stable state.

[0013] In the building of the second invention, in the first invention, the concave part is filled with a filler.

[0014] When a lateral load acts on the upper floor side device or the lower floor side device due to an earthquake or the like, it is assumed that a bending force is generated in the bent part of the anchor part accordingly. In that regard, in the second invention, since the concave part is filled with a filler such as mortar, it is possible to suppress the generation of a bending force in the bent part of the anchor part. Thereby, it is possible to suppress the anchor part from being damaged at the bent part.

[0015] In the building of the third invention, in the second invention, a reinforcing member is provided in the concrete beam so as to surround the bent part.

[0016] According to the third invention, since the reinforcing member is provided in the concrete beam so as to surround the bent part, the bent part can be reinforced. Thereby, it is possible to further suppress the anchor part from being damaged at the bent part.

[0017] In the building of the fourth invention, in the third invention, among the anchor portions, the portion embedded in the concrete beam is the anchor embedded portion, and the anchor portion has, as the bending portion, a first bending portion bent with respect to the anchor embedded portion, and a second bending portion bent in the direction opposite to the first bending portion on the side opposite to the anchor embedded portion side with respect to the first bending portion, and the reinforcing member is disposed so as to surround the first bending portion.

[0018] According to the fourth invention, the anchor portion has a first bending portion bent with respect to the anchor embedded portion and a second bending portion bent on the side opposite to the anchor embedded portion side with respect to the first bending portion. In this case, among these bending portions, the first bending portion is a portion bent with respect to the anchor embedded portion (in other words, the fixed portion fixed to the concrete beam) embedded in the concrete beam, so it is assumed that a particularly large bending force will occur during an earthquake or the like. Therefore, in the fourth invention, in view of that point, the reinforcing member is disposed so as to surround the first bending portion. Thereby, it is possible to suitably suppress the anchor portion from being damaged at the first bending portion.

[0019] In the building of the fifth invention, in the fourth invention, the reinforcing member is disposed so as to surround an end portion on the anchor embedded portion side at the first bending portion.

[0020] It is assumed that the largest bending force in the first bending portion occurs at the end portion on the anchor embedded portion side at the first bending portion. Therefore, in the fifth invention, in view of that point, the reinforcing member is disposed so as to surround the above-mentioned end portion of the first bending portion. In this case, it is possible to suitably suppress the anchor portion from being damaged at the first bending portion.

[0021] Further, the end portion on the anchor embedded portion side at the first bending portion is located substantially at the same position as the anchor embedded portion in plan view. Therefore, in the above configuration in which the reinforcing member is disposed so as to surround the above-mentioned end portion of the first bending portion, the reinforcing member can be surrounded near the first bending portion, thereby enhancing the reinforcing effect of the first bending portion.

[0022] The building according to the sixth invention includes a plurality of the anchor portions in any one of the first to fifth inventions. The lower floor side device has an upper end plate formed with a plurality of the first insertion holes. The upper end plate is connected to each of the lower anchor portions of each of the anchor portions in a state where the lower anchor portions of each of the anchor portions are inserted through the respective first insertion holes. The upper floor side device has a lower end plate formed with a plurality of the second insertion holes. The lower end plate is connected to each of the upper anchor portions of each of the anchor portions in a state where the upper anchor portions of each of the anchor portions are inserted through the respective second insertion holes. Since each of the anchor portions has the bending portion, the lower anchor portion and the upper anchor portion of each of the anchor portions are located at different positions in plan view, respectively.

[0023] According to the sixth invention, the upper end plate of the lower floor side device is connected to each of the lower anchor portions of each of the anchor portions in a state where the lower anchor portions of each of the anchor portions are inserted through the respective first insertion holes. Also, the lower end plate of the upper floor side device is connected to each of the upper anchor portions of each of the anchor portions in a state where the upper anchor portions of each of the anchor portions are inserted through the respective second insertion holes. And since each of the anchor portions has the bending portion, the lower anchor portion and the upper anchor portion of each anchor portion are located at different positions in plan view, respectively.

[0024] According to such a configuration, when a lateral load acts on the lower floor side device or the upper floor side device due to an earthquake or the like, the load can be properly dispersed and transmitted to each of the anchor portions. Therefore, it is possible to suppress the generation of an excessive bending force in the bending portion only in a part of the anchor portions among the respective anchor portions. Thereby, in a configuration where the lower floor side device and the upper floor side device are connected to a plurality of anchor portions, it is possible to preferably suppress the breakage of each anchor portion at the bending portion.

[0025] The construction method of the building according to the seventh invention is a construction method when constructing the building according to any one of the first to fifth inventions, and by placing concrete, the concrete beam having the recess is manufactured, and the placing step of embedding the anchor portion in the concrete beam in a state of penetrating the concrete beam, the anchor bending step of forming the bent portion in the recess of the anchor portion to position the lower anchor portion and the upper anchor portion at different positions in plan view, the lower floor side device connection step of inserting the lower anchor portion into the first insertion hole of the lower floor side device and connecting the lower floor side device to the lower anchor portion in the inserted state, and the upper floor side device connection step of inserting the upper anchor portion into the second insertion hole of the upper floor side device and connecting the upper floor side device to the upper anchor portion in the inserted state.

[0026] According to the seventh invention, at the construction site, a concrete beam is manufactured by placing concrete. Further, during this manufacturing, an anchor portion is embedded in the concrete beam. Thereafter, by forming a bent portion in the recess of the concrete beam in the anchor portion, the lower anchor portion and the upper anchor portion are positioned at different positions in plan view.

[0027] In such a configuration, even when the first insertion hole of the lower floor side device and the second insertion hole of the upper floor side device are positioned at shifted positions in plan view, the lower anchor portion can be inserted into the first insertion hole and the upper anchor portion can be inserted into the second insertion hole. Therefore, even if the first insertion hole and the second insertion hole are not formed large, the lower floor side device can be connected to the lower anchor portion, and the upper floor side device can be connected to the upper anchor portion. Thereby, the lower floor side device and the upper floor side device can be connected to the common anchor portion in a stable state.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Best Mode for Carrying Out the Invention

[0029] Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, the building of the present invention is embodied as a multi-story building of reinforced concrete construction (RC construction). Further, the building of this embodiment is, for example, a mid-rise condominium. FIG. 1 is a front view showing an overview of a building in which vibration control devices are installed on each floor.

[0030] As shown in FIG. 1, the building 10 is a multi-story building having a plurality of floor sections 11. In the building 10, concrete beams 15 are provided at the boundary between each pair of vertically adjacent floor sections 11. The concrete beam 15 is made of reinforced concrete and is manufactured by casting on site. That is, the concrete beam 15 is a cast-in-place concrete beam. Note that the concrete beam 15 is supported by being connected to concrete columns (not shown).

[0031] In the building 10, vibration control devices 17 are provided for each floor section 11. The vibration control device 17 for each floor section 11 suppresses the vibration when the building 10 vibrates due to an earthquake or the like. The vibration control devices 17 are arranged side by side in the vertical direction. Each vibration control device 17 is installed so as to straddle the concrete beams 15 arranged on both the upper and lower sides with the vibration control device 17 in between. And each vibration control device 17 is fixed to those concrete beams 15 via anchor bolts 20 (FIG. 2).

[0032] The vibration damping devices 17 adjacent to each other vertically with the concrete beam 15 interposed therebetween are fixed to the concrete beam 15 via common anchor bolts 20. Therefore, hereinafter, the configuration related to the fixing will be described based on FIG. 2. Note that FIG. 2 is a longitudinal sectional view showing a configuration in which the vibration damping devices 17 on the upper and lower floors are connected to the common anchor bolts 20. Further, hereinafter, each floor portion 11 adjacent to each other vertically will be referred to as a lower floor portion 11A and an upper floor portion 11B, the vibration damping device 17 installed in the lower floor portion 11A will be referred to as a vibration damping device 17A, and the vibration damping device 17 installed in the upper floor portion 11B will be referred to as a vibration damping device 17B. Note that the vibration damping device 17A corresponds to the "lower floor side device", and the vibration damping device 17B corresponds to the "upper floor side device".

[0033] As shown in FIG. 2, the concrete beam 15 disposed at the boundary between the lower floor portion 11A and the upper floor portion 11B is provided with a plurality of anchor bolts 20. Each anchor bolt 20 is embedded in the concrete beam 15 in a state of penetrating the concrete beam 15 vertically. Note that each anchor bolt 20 corresponds to the "anchor portion".

[0034] Each anchor bolt 20 has an anchor lower portion 21 exposed on the lower surface side of the concrete beam 15 and an anchor upper portion 22 exposed on the upper surface side of the concrete beam 15. The anchor lower portion 21 is a portion extending downward from the lower surface of the concrete beam 15, and the anchor upper portion 22 is a portion extending upward from the upper surface of the concrete beam 15. Both the anchor lower portion 21 and the anchor upper portion 22 extend linearly in the vertical direction.

[0035] The vibration damping devices 17A and 17B (and thus the vibration damping devices 17 of each floor portion 11) of the lower floor portion 11A and the upper floor portion 11B have a lower end plate 18 at the lower end portion and an upper end plate 19 at the upper end portion. In FIG. 2, the upper end plate 19 of the vibration damping device 17A and the lower end plate 18 of the vibration damping device 17B are shown. A plurality of insertion holes 18a through which the anchor bolts 20 can be inserted are formed in the lower end plate 18. Further, a plurality of insertion holes 19a through which the anchor bolts 20 can be inserted are formed in the upper end plate 19.

[0036] The vibration damping device 17A is connected to each anchor lower part 21 with the anchor lower parts 21 of the respective anchor bolts 20 inserted through the respective insertion holes 19a (corresponding to the first insertion holes) of the upper end plate 19. A pair of nuts 31 are screwed onto each anchor lower part 21, and these nuts 31 are tightened on the anchor lower part 21 so as to sandwich the upper end plate 19 vertically. Thereby, the upper end plate 19 is connected to each anchor lower part 21, and by extension, the vibration damping device 17A is connected to each anchor lower part 21.

[0037] The vibration damping device 17B is connected to each anchor upper part 22 with the anchor upper parts 22 of the respective anchor bolts 20 inserted through the respective insertion holes 18a (corresponding to the second insertion holes) of the lower end plate 18. A nut 32 is screwed onto each anchor upper part 22, and these nuts 32 are provided on the upper surface side of the lower end plate 18. By these nuts 32, the lower end plate 18 is fixed to the concrete beam 15, and by extension, the vibration damping device 17B is fixed to the concrete beam 15.

[0038] Here, in the building 10 described above, it is assumed that a deviation may occur in the positional relationship of each of the vibration damping devices 17A and 17B in plan view due to construction accuracy or the like of the lower floor part 11A and the upper floor part 11B. In that case, the insertion holes 19a and 18a of each of the vibration damping devices 17A and 17B will be located at displaced positions in plan view. Therefore, in the present embodiment, even in such a case, a characteristic configuration is provided around the anchor bolt 20 so that the anchor lower part 21 of the anchor bolt 20 can be inserted through the insertion hole 19a of the vibration damping device 17A and the anchor upper part 22 of the anchor bolt 20 can be inserted through the insertion hole 18a of the vibration damping device 17B. Hereinafter, the characteristic configuration will be described.

[0039] A plurality of recesses 41 opened upward are formed in the concrete beam 15. These plurality of recesses 41 are provided corresponding to the respective anchor bolts 20. Each recess 41 is, for example, a columnar or conical recess.

[0040] Each anchor bolt 20 extends vertically through the recess 41. Each anchor bolt 20 has an anchor embedded part 42 embedded in the concrete beam 15 below the recess 41 and a pair of bent parts 43, 44 bent in the recess 41. The anchor embedded part 42 extends linearly in the vertical direction and is connected to the lower part 21 of the anchor at its lower end. Further, the anchor embedded part 42 is located at the center of the recess 41 in plan view.

[0041] Of the bent parts 43, 44, the lower bent part is the first bent part 43 and the upper bent part is the second bent part 44. Both the first bent part 43 and the second bent part 44 are bent in an arc shape, and the bending directions are opposite to each other. The first bent part 43 is bent with respect to the anchor embedded part 42, and its lower end is connected to the upper end of the anchor embedded part 42. The lower end of the first bent part 43, that is, the end on the side of the anchor embedded part 42 in the first bent part 43, is located at the same height as the center of the arc of the first bent part 43. Also, the lower end of the first bent part 43 is located at the same height as the bottom 41a of the recess 41.

[0042] The second bent part 44 is located on the side opposite to the side of the anchor embedded part 42 with respect to the first bent part 43. The second bent part 44 is bent with respect to the upper part 22 of the anchor, and its upper end is connected to the lower end of the upper part 22 of the anchor. The upper end of the second bent part 44, that is, the end on the side opposite to the first bent part 43 side in the second bent part 44, is located at the same height as the center of the arc of the second bent part 44. Also, the upper end of the second bent part 44 is located at the same height as the upper surface of the concrete beam 15.

[0043] Since each anchor bolt 20 has the first bent part 43 and the second bent part 44, the lower part 21 of the anchor and the upper part 22 of the anchor in each anchor bolt 20 are located at different positions from each other in plan view. That is, in each anchor bolt 20, the lower part 21 of the anchor and the upper part 22 of the anchor are located at positions shifted from each other in the horizontal direction.

[0044] In each anchor bolt 20, a linear connecting portion 45 that connects the first bending portion 43 and the second bending portion 44 is provided between the first bending portion 43 and the second bending portion 44. The connecting portion 45 extends in an inclined direction that is inclined with respect to the vertical direction. Note that the connecting portion 45 may not be provided on the anchor bolt 20, and the first bending portion 43 and the second bending portion 44 may be directly connected.

[0045] In the concrete beam 15, a reinforcing member 49 is provided so as to surround the first bending portion 43 of the anchor bolt 20. Hereinafter, the reinforcing member 49 will be described with reference to FIGS. 2 and 3. Note that FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2. In addition, in FIG. 3, for the sake of convenience, illustrations other than the reinforcing member 49 and the anchor bolt 20 are omitted.

[0046] As shown in FIGS. 2 and 3, the reinforcing member 49 is made of a reinforcing bar and is formed by being bent in a horizontal plane. The reinforcing member 49 is provided so as to surround the first bending portion 43 of each anchor bolt 20. The reinforcing member 49 is disposed at the same height position as the bottom portion 41a of the concave portion 41. In this case, the reinforcing member 49 surrounds the lower end portion of the first bending portion 43 of each anchor bolt 20. In other words, the reinforcing member 49 surrounds the end portion on the anchor embedding portion 42 side of each first bending portion 43. Further, at least a part of the reinforcing member 49 is disposed in a state of being embedded in the concrete beam 15.

[0047] Specifically, the reinforcing member 49 has a pair of surrounding portions 49a that surround the first bending portion 43 of each anchor bolt 20 in a U shape, and a connecting portion 49b that linearly connects the pair of surrounding portions 49a. The open portions of the U shapes of the surrounding portions 49a face each other.

[0048] Each concave portion 41 is filled with mortar 51. By filling the concave portion 41 with the mortar 51, the portions of the anchor bolt 20 disposed in the concave portion 41, that is, the bending portions 43 and 44 and the connecting portion 45, are in a state of being embedded in the mortar 51. Note that the mortar 51 corresponds to the "filling material".

[0049] Next, the construction procedure of the above-described building 10 will be described with reference to FIG. 4. FIG. 4 is a longitudinal sectional view for explaining the construction procedure of the building 10.

[0050] At the construction site of the building 10, first, as shown in FIG. 4(a), a vibration damping device 17A is installed in the lower floor portion 11A, and a lower floor side device connection step is performed in which the upper end plate 19 of the vibration damping device 17A is connected to the anchor lower portion 21 of each anchor bolt 20. In this step, the anchor lower portion 21 of each anchor bolt 20 is inserted into each insertion hole 19a of the upper end plate 19, and in the inserted state, the upper end plate 19 is connected to each of these anchor lower portions 21. Further, this connection is performed by tightening a pair of nuts 31 to the anchor lower portion 21 so as to sandwich the upper end plate 19.

[0051] Note that in the lower floor side device connection step, as described above, the step of connecting the upper end plate 19 of the vibration damping device 17A to the anchor lower portion 21 of each anchor bolt 20 (hereinafter referred to as the connection step) and the step of installing the vibration damping device 17A in the lower floor portion 11A (hereinafter referred to as the installation step) are each performed. However, among these steps, the connection step may be performed first, or the installation step may be performed first. For example, when the connection step is performed first, at the time of the installation step, the vibration damping device 17A is installed in the lower floor portion 11A with each anchor bolt 20 connected to the upper end plate 19.

[0052] Subsequently, as shown in FIG. 4(b), a placing step is performed in which a concrete beam 15 having a recess 41 is manufactured by placing concrete at the boundary between the lower floor portion 11A and the upper floor portion 11B. In this step, concrete is placed in a state where a bottomed cylindrical portion (not shown) that opens upward is disposed in the region where the recess 41 is formed. In this case, since the concrete is prevented from entering the inside of the cylindrical portion, the recess 41 is formed inside the cylindrical portion. Further, in the placing step, by placing the concrete, each anchor bolt 20 is embedded in the concrete beam 15 in a state of penetrating the concrete beam 15 vertically, and the reinforcing material 49 is also embedded in the concrete beam 15.

[0053] Subsequently, as shown in FIG. 4(c), an anchor bending step is performed in which bending portions 43 and 44 are formed in the recess 41 of the concrete beam 15 for each anchor bolt 20, so that the anchor upper portion 22 of each anchor bolt 20 is positioned at a different position from the anchor lower portion 21 in plan view. In this step, the bending portions 43 and 44 are formed by bending each anchor bolt 20 using a bending jig or the like.

[0054] When performing the anchor bending step, first, when the vibration damping device 17B is installed in the upper floor portion 11B, it is grasped how much the vibration damping device 17B is displaced from the vibration damping device 17A in the lower floor portion 11A in plan view. Specifically, it is grasped how much the insertion hole 18a of the lower end plate 18 of the vibration damping device 17B is displaced from the insertion hole 19a of the upper end plate 19 of the vibration damping device 17A in plan view. Then, according to the grasped displacement, each anchor bolt 20 is bent in the recess 41 (that is, by forming the bending portions 43 and 44 in each anchor bolt 20), so that the anchor upper portion 22 of each anchor bolt 20 is positioned at a position corresponding to each insertion hole 18a of the vibration damping device 17B.

[0055] Subsequently, as shown in FIG. 4(d), a filling step of filling each recess 41 of the concrete beam 15 with mortar 51 is performed. In this step, the mortar 51 is filled into each recess 41 in a fluid state, and then the mortar 51 is solidified.

[0056] Subsequently, as shown in FIG. 4(e), an upper floor side device connection step is performed in which the vibration damping device 17B is installed in the upper floor portion 11B and the lower end plate 18 of the vibration damping device 17B is connected to the anchor upper portion 22 of each anchor bolt 20. In this step, the anchor upper portion 22 of each anchor bolt 20 is inserted into each insertion hole 18a of the lower end plate 18 of the vibration damping device 17B, and the lower end plate 18 is connected to each of those anchor upper portions 22 in the inserted state.

[0057] As described above, each vibration damping device 17A and 17B is connected to the common anchor bolt 20 respectively. Thereby, a series of operations is completed.

[0058] According to the configuration of the present embodiment described in detail above, the following excellent effects can be obtained.

[0059] The vibration damping device 17A of the lower floor portion 11A is connected to each anchor lower portion 21 of each anchor bolt 20 in a state where the anchor lower portion 21 of each anchor bolt 20 is inserted into each insertion hole 19a (corresponding to the first insertion hole) of the upper end plate 19. Further, the vibration damping device 17B of the upper floor portion 11B is connected to each anchor upper portion 22 of each anchor bolt 20 in a state where the anchor upper portion 22 of each anchor bolt 20 is inserted into each insertion hole 18a (corresponding to the second insertion hole) of the lower end plate 18. A concave portion 41 opened upward is formed in the concrete beam 15. Each anchor bolt 20 extends vertically through the concave portion 41 and has bent portions 43 and 44 bent in the concave portion 41. And because each anchor bolt 20 has the bent portions 43 and 44, the anchor lower portion 21 and the anchor upper portion 22 of each anchor bolt 20 are located at different positions in a plan view.

[0060] According to such a configuration, even when, due to the construction accuracy of the lower floor portion 11A and the upper floor portion 11B during on-site construction, the vibration damping devices 17A and 17B are arranged in a positional relationship shifted in a plan view, that is, even when the insertion hole 19a of the vibration damping device 17A and the insertion hole 18a of the vibration damping device 17B are located at shifted positions in a plan view, by bending and deforming each anchor bolt 20 in the concave portion 41 according to the shift (that is, by forming the bent portions 43 and 44 in each anchor bolt 20), the anchor lower portion 21 can be positioned at a position corresponding to the insertion hole 19a of the vibration damping device 17A, and the anchor upper portion 22 can be positioned at a position corresponding to the insertion hole 18a of the vibration damping device 17B. Thereby, even if the insertion holes 18a and 19a are not formed large, the anchor lower portion 21 can be inserted into the insertion hole 19a, and the anchor upper portion 22 can be inserted into the insertion hole 18a. And in such an inserted state, the vibration damping device 17A can be connected to the anchor lower portion 21, and the vibration damping device 17B can be connected to the anchor upper portion 22. Therefore, in this case, the vibration damping devices 17A and 17B can be stably connected to the common anchor bolt 20.

[0061] When a lateral load acts on each of the vibration damping devices 17A and 17B due to an earthquake or the like, it is assumed that a bending force is generated in the bending portions 43 and 44 of the anchor bolt 20 accordingly. In this regard, in the above-described embodiment, since the recess 41 is filled with the mortar 51, it is possible to suppress the generation of a bending force in the bending portions 43 and 44 of the anchor bolt 20. Thereby, it is possible to suppress the anchor bolt 20 from being damaged at the bending portions 43 and 44.

[0062] Since the reinforcing member 49 is provided so as to surround the first bending portion 43 in the concrete beam 15, the first bending portion 43 can be reinforced. Thereby, it is possible to further suppress the anchor bolt 20 from being damaged at the first bending portion 43.

[0063] In particular, among the bending portions 43 and 44, the first bending portion 43 is a portion bent with respect to the anchor embedding portion 42 (in other words, the fixed portion fixed to the concrete beam 15) embedded in the concrete beam 15. Therefore, it is assumed that a large bending force is generated during an earthquake or the like. Therefore, according to the above-described configuration in which the reinforcing member 49 is arranged so as to surround the first bending portion 43, it is possible to suitably suppress the anchor bolt 20 from being damaged at the first bending portion 43.

[0064] At the end portion of the first bending portion 43 on the side of the anchor embedding portion 42, it is assumed that the largest bending force is generated in the first bending portion 43. Therefore, in the above-described embodiment, in view of this point, the reinforcing member 49 is arranged so as to surround the end portion of the first bending portion 43. In this case, it is possible to suitably suppress the anchor bolt 20 from being damaged at the first bending portion 43.

[0065] Further, the end portion of the first bending portion 43 on the side of the anchor embedding portion 42 is located at substantially the same position as the anchor embedding portion 42 in plan view. Therefore, in the above-described configuration in which the reinforcing member 49 is arranged so as to surround the end portion of the first bending portion 43, the reinforcing member 49 can be surrounded near the first bending portion 43, thereby enhancing the reinforcing effect of the first bending portion 43.

[0066] The vibration damping device 17A of the lower floor part 11A has its upper end plate 19 connected to each anchor lower part 21 of each anchor bolt 20 in a state where the anchor lower part 21 of each anchor bolt 20 is inserted through each insertion hole 19a. Further, the vibration damping device 17B of the upper floor part 11B has its lower end plate 18 connected to each anchor upper part 22 of each anchor bolt 20 in a state where the anchor upper part 22 of each anchor bolt 20 is inserted through each insertion hole 18a. And since each anchor bolt 20 has bending parts 43 and 44 respectively, the anchor lower part 21 and the anchor upper part 22 of each anchor bolt 20 are located at different positions in plan view.

[0067] According to such a configuration, when a lateral load acts on the vibration damping devices 17A and 17B due to an earthquake or the like, the load can be properly dispersed and transmitted to each anchor bolt 20. Therefore, it is possible to suppress the generation of an excessive bending force in the bending parts 43 and 44 only in a part of the anchor bolts 20 among each anchor bolt 20. Thereby, in a configuration where each vibration damping device 17A and 17B is connected to a plurality of anchor bolts 20, it is possible to preferably suppress the breakage of each anchor bolt 20 at the bending parts 43 and 44.

[0068] The present invention is not limited to the above-described embodiment, and may be implemented, for example, as follows.

[0069] · In the above-described embodiment, the concave part 41 that opens upward is provided in the concrete beam 15, but this may be changed to provide a concave part that opens downward in the concrete beam 15. In this case, the concave part is opened on the lower surface of the concrete beam 15. Also in such a configuration, by forming a bending part in the concave part in the anchor bolt 20, the anchor lower part 21 and the anchor upper part 22 can be located at different positions in plan view.

[0070] · As the filling material to fill the concave part 41, concrete may be used instead of the mortar 51.

[0071] ·The reinforcing member 49 does not necessarily have to be provided so as to surround the lower end of the first bending portion 43 (in other words, the end portion on the anchor embedding portion 42 side in the first bending portion 43), and it may be provided so as to surround a portion other than the lower end portion, such as the vicinity of the central portion of the first bending portion 43.

[0072] Further, a reinforcing member surrounding the second bending portion 44 may be provided on the concrete beam 15 instead of or in addition to the above-described reinforcing member 49. In this case, it is possible to suppress the breakage of the anchor bolt 20 in the second bending portion 44. In this case, the reinforcing member 49 surrounding the first bending portion 43 corresponds to the first reinforcing member, and the reinforcing member surrounding the second bending portion 44 corresponds to the second reinforcing member.

[0073] ·In the above-described embodiment, a plurality of recesses 41 are provided for each anchor bolt 20 in the concrete beam 15, but this may be changed so that a single recess common to all the anchor bolts 20 is provided in the concrete beam 15. However, in this case, since the size of the recess becomes large, there is a concern about a decrease in the strength of the concrete beam 15. Therefore, in view of that point, it is desirable to provide the recesses 41 for each anchor bolt 20 as in the above-described embodiment.

[0074] ·For example, in order to improve the positional accuracy of each anchor bolt 20, a lower plate member may be connected to the anchor lower portion 21 of each anchor bolt 20 in a state where the anchor lower portions 21 penetrate therethrough, and an upper plate member may be connected to the anchor upper portion 22 of each anchor bolt 20 in a state where the anchor upper portions 22 penetrate therethrough. In this case, the lower plate member is disposed on the lower surface side of the concrete beam 15, and the upper plate member is disposed on the upper surface side of the concrete beam 15. Then, the vibration damping device 17A is disposed on the lower surface side of the lower plate member, and the upper end plate 19 of the vibration damping device 17A is connected to each anchor lower portion 21 in that disposed state. Further, the vibration damping device 17B is disposed on the upper surface side of the upper plate member, and the lower end plate 18 of the vibration damping device 17B is connected to each anchor upper portion 22 in that disposed state.

[0075] ·In the above-described embodiment, the vibration damping devices 17A and 17B are installed in the lower floor part 11A and the upper floor part 11B, respectively. However, devices other than the vibration damping device, such as storage devices, may be installed in the lower floor part 11A and the upper floor part 11B. Therefore, in such a case, when connecting the device installed in the lower floor part 11A (corresponding to the lower floor side device) and the device installed in the upper floor part 11B (corresponding to the upper floor side device) to the common anchor bolt 20, the present invention may be applied.

Explanation of Signs

[0076] 10…Building, 11A…Lower floor part, 11B…Upper floor part, 15…Concrete beam, 17A…Vibration damping device as the lower floor side device, 17B…Vibration damping device as the upper floor side device, 20…Anchor bolt as the anchor part, 21…Lower part of the anchor, 22…Upper part of the anchor, 41…Recess, 42…Anchor embedding part, 43…First bending part, 44…Second bending part, 49…Reinforcing material, 51…Mortar as the filling material.

Claims

1. A concrete beam is provided at the boundary between the upper and lower floors, which are adjacent to each other. An anchor portion embedded in the concrete beam in a state of vertically penetrating the concrete beam; A lower floor side device installed on the lower floor; An upper floor side device installed in the upper floor portion, The anchor portion has a lower anchor portion exposed on the lower surface side of the concrete beam and an upper anchor portion exposed on the upper surface side of the concrete beam, The lower floor side device has a first insertion hole through which the lower part of the anchor is inserted, and is connected to the lower part of the anchor in a state in which the lower part of the anchor is inserted into the first insertion hole, The upper floor side device has a second insertion hole through which the upper part of the anchor is inserted, and is connected to the upper part of the anchor in a state in which the upper part of the anchor is inserted into the second insertion hole. The concrete beam has a recess that opens upward or downward, The anchor portion extends vertically through the recess and has a bent portion bent in the recess, A building, wherein the anchor portion has the bent portion, so that the lower portion and the upper portion of the anchor are located at different positions in a plan view.

2. The building according to claim 1 , wherein the recess is filled with a filling material.

3. The building according to claim 2 , wherein the concrete beam is provided with a reinforcement material surrounding the bent portion.

4. A portion of the anchor portion that is embedded in the concrete beam is an anchor embedded portion, The anchor portion is configured as the bending portion. A first bent portion bent relative to the anchor embedment portion; a second bent portion bent in a direction opposite to the first bent portion on a side opposite to the anchor embedding portion side from the first bent portion, The building according to claim 3 , wherein the reinforcing material is arranged to surround the first bent portion.

5. The building according to claim 4 , wherein the reinforcing material is arranged so as to surround an end portion of the first bent portion on a side where the anchor is embedded.

6. A plurality of the anchor portions are provided, The lower floor side device has an upper end plate having a plurality of the first insertion holes formed therein, the upper end plate is connected to the anchor lower parts of the anchor parts in a state in which the anchor lower parts are inserted into the first insertion holes, The upper floor side device has a lower end plate having a plurality of the second insertion holes formed therein, the lower end plate is connected to the upper portions of the anchor portions in a state in which the upper portions of the anchor portions are inserted into the second insertion holes, The building according to any one of claims 1 to 5, wherein each of the anchor parts has the bent part, such that the lower anchor part and the upper anchor part of each of the anchor parts are located at different positions in a plan view.

7. A construction method for constructing the building according to any one of claims 1 to 5, A casting process in which the concrete beam having the recess is manufactured by casting concrete, and the anchor portion is embedded in the concrete beam in a state in which the anchor portion penetrates the concrete beam; an anchor bending process in which the bent portion is formed in the recess of the anchor portion, so that the lower portion and the upper portion of the anchor are positioned at different positions in a plan view; a lower floor side device connecting step of inserting the lower part of the anchor into the first insertion hole of the lower floor side device and connecting the lower floor side device to the lower part of the anchor in the inserted state; an upper floor side device connecting step of inserting the upper part of the anchor into the second insertion hole of the upper floor side device and connecting the upper floor side device to the upper part of the anchor in the inserted state; A building construction method comprising:

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