Method for constructing a joint structure and support member

Abstract

To provide a method for constructing a joint structure that can be built without installing a support structure to support beam members, and a support member.SOLUTION: A method of constructing a ramen structure 1 in which a beam member 20 is joined to a column member 10 having a loop-shaped column-side rebar 11 protruding from an opposing surface 10a at a joint 30 includes: a beam installation step (step s2), in which an end portion of the beam member 20 is installed on a bracket 40 provided below the joint 30 in the opposing surface 10a, so as to assemble the loop-shaped beam-side rebar 21 protruding from an end portion of the beam member 20 with the loop-shaped column-side rebar 11; a concrete placement step (step s3) to pour concrete in the assembled portion where the loop-shaped column-side rebar 11 and the loop-shaped beam-side rebar 21 are assembled to construct the joint 30; and a bracket removal step (step s5) to remove the bracket 40, after the concrete has hardened and developed a predetermined strength.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to, for example, a method of constructing a joint structure formed by joining precast beam members to column members, and a support member used in the construction method.

Background Art

[0002] For example, as described in Patent Document 1, there is a ramen structure formed by joining precast beam members to column members. Such a joint structure is constructed by spanning a beam member between column members and placing concrete at the joint portion. Therefore, a shoring is installed between the column members, and the beam member is placed and supported on the shoring, and then concrete is placed at the joint portion for construction. Thus, it was difficult to shorten the process because construction could not be carried out in locations where shoring could not be installed, or because it took time to install and remove the shoring.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, an object of this invention is to provide a method of constructing a joint structure that can be constructed without installing shoring for supporting the beam member, and a support member.

Means for Solving the Problems

[0005] The present invention relates to a method for constructing a joint structure in which a precast beam member is joined to a column member from which column-side reinforcing bars protrude from its end, comprising: a beam installation step of setting the end of the beam member so as to assemble the beam-side reinforcing bars protruding from the end of the precast beam member to the column-side reinforcing bars with respect to a support member provided below the joint on the side of the column member; a concrete pouring step of pouring concrete into the assembly portion where the column-side reinforcing bars and the beam-side reinforcing bars are assembled to construct the joint; and a support member removal step of removing the support member after the poured concrete has hardened and achieved a predetermined strength. i. Before the support member removal step, a load removal step is performed to remove the load on the joint acting on the support member. It is characterized by the following:

[0006] Furthermore, this invention is provided below the joint on the side of a column member, in which a precast beam member is joined at a joint to a column member from which column-side reinforcing bars protrude from the end, to construct a joint structure. Support member The end of the precast beam member is installed so that the beam-side reinforcing bars protruding from the end of the beam member are assembled to the column-side reinforcing bars. Mounting section and The concrete poured into the assembly portion where the column-side reinforcement and the beam-side reinforcement are assembled can be removed after it has hardened and achieved a predetermined strength. , relative to the column member solid A fixed body is provided, and a load-relieving means is provided for moving the aforementioned mounting part relative to the fixed body to relieve the load acting on the joint. It is characterized by the following:

[0007] This invention makes it possible to construct a joint structure in which a precast beam member is joined to a column member from which column-side reinforcing bars protrude from the end, without installing shoring to support the beam member. More specifically, in the beam installation process, the end of the precast beam member is installed such that the beam-side reinforcing bars protruding from the end of the beam member are assembled to the column-side reinforcing bars with respect to a support member provided below the joint on the side of the column member. Therefore, the precast beam member can be supported by the support member provided on the column member. Consequently, there is no need to install shoring to support the beam member before it is joined to the column member at the joint.

[0008] Furthermore, during the concrete pouring process, concrete is poured into the assembly portion to construct the joint, and after the poured concrete hardens and achieves the predetermined strength, the support members that are no longer needed when the construction of the joint structure is complete can be removed.

[0009] As described above, since it is not necessary to install scaffolding to support the beam member between the column member and the joint, the joint structure can be constructed even in places where scaffolding cannot be installed, and the time required for installing and removing scaffolding can also be reduced. 。

[0010] Also, Before the support member removal step, a load removal step may be performed to remove the load on the joint acting on the support member, or, A load-removing means for moving the aforementioned mounting portion relative to the fixed body to remove the load acting on the joint. It is provided on the support member Therefore, The load on the joint acting on the support member is removed, allowing the support member to be easily removed.

[0011] Furthermore, joint structures in which a precast beam member is joined to a column member from which column-side reinforcing bars protrude from the end include rigid frame structures in which multiple column members and beam members spanning across the column members are rigidly connected, or cantilever structures in which short beam members extend from a column member in a cantilevered manner.

[0012] In another aspect of this invention, the support member is provided with an expandable / contractible means that expands and contracts in the direction in which the load acts, and in the unloading step, the expandable / contractible means may be reduced in size, or the unloading means may be an expandable / contractible means that expands and contracts in the direction in which the load acts on the support member. This invention makes it possible to remove the load acting on the support member by shortening the expandable / contractible means that constitutes the load removal means in the direction of action.

[0013] In another aspect of this invention, the support member may be provided with a support surface lowering means for which a support surface supporting the end of the beam member is lowered, and in the unloading step, the support surface of the support surface lowering means may be lowered, or the unloading means may be a support surface lowering means for which a support surface supporting the end of the beam member is lowered.

[0014] According to the present invention, in the support surface lowering means constituting the load unloading means, the load unloading means can easily unload the load acting on the support member by lowering the support surface that supports the end portion of the beam member in the support member.

[0015] As an aspect of the present invention, the support surface lowering means may be configured such that the support surface descends by moving in a crossing direction that intersects the acting direction in which the load acts. According to the present invention, by moving the support surface lowering means in the crossing direction and causing the support surface to descend, the load acting on the support member can be easily unloaded.

[0016] Note that the support surface lowering means in which the support surface descends by moving in a crossing direction that intersects the acting direction in which the load acts can be configured, for example, by a wedge-shaped portion having a support surface and a moving mechanism that moves the wedge-shaped portion in the crossing direction.

Effect of the Invention

[0017] According to the present invention, it is possible to provide a construction method of a joint structure that can be constructed without installing a shoring for supporting a beam member and a support member.

Brief Description of the Drawings

[0018] [Figure 1] Explanatory drawing of a ramen structure. [Figure 2] Explanatory drawing of a bracket. [Figure 3] Explanatory drawing by an exploded perspective view of a bracket. [Figure 4] Flowchart of the construction method of a ramen structure. [Figure 5] Explanatory drawing by a perspective view of the construction method of a ramen structure. [Figure 6] Explanatory drawing by a perspective view of the construction method of a ramen structure. [Figure 7] Explanatory drawing by a perspective view of the construction method of a ramen structure. [Figure 8]An explanatory diagram showing the construction method of a ramen-style structure, with enlarged views of key parts. [Figure 9] A partial perspective view of a ramen noodle structure. [Figure 10] An explanatory diagram using an exploded perspective view of another bracket. [Figure 11] Here's another diagram illustrating a different bracket. [Figure 12] Here's yet another diagram explaining a different bracket. [Figure 13] An explanatory diagram of a different type of frame structure. [Modes for carrying out the invention]

[0019] One embodiment of this invention will be described below with reference to the drawings. Figure 1 shows an explanatory diagram of the rigid frame structure 1, Figure 2 shows an explanatory diagram of the bracket 40 used in the construction of the rigid frame structure 1, and Figure 3 shows an exploded perspective view of the bracket 40.

[0020] More specifically, Figure 1(a) shows a schematic front view of the rigid frame structure 1 before assembly, and Figure 1(b) shows a schematic front view of the rigid frame structure 1 after construction is complete. Figure 2(a) is a perspective view showing the rear, bottom, and left side of the bracket 40 in its normal state; Figure 2(b) is a perspective view showing the front, top, and right side of the bracket 40 in the same state; Figure 2(c) is a perspective view showing the rear, bottom, and left side of the bracket 40 in its lowered state; and Figure 2(d) is a perspective view showing the front, top, and right side of the bracket 40 in the same state. Furthermore, Figure 3(a) is an exploded perspective view showing the rear, bottom, and left side of the bracket 40, and Figure 3(b) is an exploded perspective view showing the front, top, and right side of the bracket 40.

[0021] Furthermore, Figure 4 shows a flowchart of the construction method for the rigid frame structure 1, Figures 5 to 7 show explanatory diagrams illustrating the construction method for the rigid frame structure 1 using partial perspective views, Figure 8 shows an explanatory diagram illustrating the unloading process (step s4) in the construction method for the rigid frame structure 1 using an enlarged view of the main parts, and Figure 9 shows a partial perspective view of the rigid frame structure 1 in the completed state of the bracket removal process (step s5).

[0022] Figures 5 to 7 and 9 show perspective views of the portion where a beam member 20 is joined to the rightmost column member 10 in Figure 1, which is part of a pair of column members 10 arranged at a predetermined distance in the width direction W. Figure 8 shows an enlarged view of the main part around the bracket 40 in the same portion.

[0023] For details, Figure 5(a) shows a partial perspective view of the bracket installation process (step s1), Figure 5(b) shows a partial perspective view of the state before the beam member 20 is installed, Figure 6(a) shows a partial perspective view of the beam installation process (step s2), Figure 6(b) shows a partial perspective view of the concrete pouring process (step s3), Figure 7(a) shows a partial perspective view of the state after concrete pouring is completed, and Figure 7(b) shows a partial perspective view of the unloading process (step s4). Note that in Figure 7, the beam member 20 and the joint 30 are shown in a transparent state. Also, in Figure 7(a), the illustration of the formwork for pouring concrete to form the joint 30 is omitted. Figure 8(a) shows a close-up view of the main parts after concrete placement is complete, and Figure 8(a) shows a close-up view of the main parts after unloading.

[0024] The present invention is a method for constructing a rigid frame structure 1, which is formed by joining a precast beam member 20, which is stretched across a column member 10 on which loop-shaped column-side reinforcing bars 11 protrude in the opposing direction Wi from an upper opposing surface 10a, at a joint 30. More specifically, the rigid frame structure 1 is configured in a portal shape when viewed from the front, consisting of a pair of column members 10 and beam members 20 that span across the pair of column members 10 and are joined at joints 30, and the column members 10 and beam members 20 are rigidly connected.

[0025] In the following explanation, the direction in which the pair of column members 10 are arranged is defined as the width direction W, the height of the column members 10 is defined as the height direction H, and the direction perpendicular to both the width direction W and the height direction H is defined as the depth direction L. Furthermore, within the width direction W, the direction in which the pair of column members 10 face each other is defined as the opposing direction Wi, and the opposite side is defined as the outward direction Wo. In addition, within the height direction H, the upper side is defined as the upward direction Hu, and the lower side is defined as the downward direction Hd.

[0026] The pair of column members 10 are made of reinforced concrete, have a square cross-section, and are arranged at predetermined intervals. The column members 10 may be made of cast-in-place reinforced concrete or precast reinforced concrete. Furthermore, in the column member 10 formed in the shape of a rectangular prism, a loop-shaped column-side reinforcing bar 11 protrudes in the opposing direction Wi from above the opposing surface 10a facing the other column member 10.

[0027] The loop-shaped column-side reinforcement bars 11 protrude in a rectangular loop shape. As shown in Figure 5(a), multiple loop-shaped column-side reinforcement bars 11 are arranged at appropriate intervals in the depth direction L. The size, shape, number, and diameter of the loop-shaped column-side reinforcement bars 11 are set to appropriate sizes, shapes, numbers, and diameters for the rigid frame structure 1 and beam members 20.

[0028] The loop-shaped column-side reinforcement bars 11 are formed in a rectangular loop shape that is shorter than the length of the height H and width W of the joint 30, as they will be combined with the loop-shaped beam-side reinforcement bars 21 of the beam member 20, which will be described later, to form the main reinforcement at the joint 30.

[0029] Furthermore, a form connector 12 for fixing a bracket 40 (described later) is embedded to a predetermined length in the opposing surface 10a of the column member 10. The form connector 12 is positioned below the loop-shaped column-side reinforcing bar 11 that protrudes in the opposing direction Wi on the opposing surface 10a.

[0030] The beam members 20 that span the pair of column members 10 are made of precast reinforced concrete and are formed in the shape of a rectangular column with a square cross-section, and are arranged so that they are longer in the width direction W. The beam members 20, which are arranged to be elongated in the width direction W, are formed to be shorter than the length in the width direction W between the opposing surfaces 10a of the pair of column members 10.

[0031] Specifically, the beam member 20 is formed with a length in the width direction W shorter than the distance in the width direction W between the opposing surfaces 10a of the pair of column members 10, by the amount of the joints 30 formed on both sides in the width direction W. Loop-shaped beam-side reinforcement bars 21 protrude outward in the direction Wo from both end faces in the width direction W of the beam member 20.

[0032] The loop-shaped beam-side reinforcement bars 21 protrude in a rectangular loop shape, similar to the loop-shaped column-side reinforcement bars 11 described above. As shown in Figure 5(a), multiple loop-shaped beam-side reinforcement bars 21 are arranged at appropriate intervals in the depth direction L. The size, shape, number, and diameter of the loop-shaped beam-side reinforcement bars 21 are set to appropriate sizes, shapes, numbers, and diameters for the rigid frame structure 1 and beam members 20, similar to the loop-shaped column-side reinforcement bars 11.

[0033] As described above, the loop-shaped beam-side reinforcement bars 21 are combined with the loop-shaped beam-side reinforcement bars 21 of the column member 10 to form the main reinforcement in the joint 30, and are therefore formed in a rectangular loop shape that is shorter than the length of the joint 30 in the height direction H and the width direction W.

[0034] The joint 30 is formed between the opposing surface 10a of the column member 10 and the end surface of the beam member 20, and integrates the column member 10 and the beam member 20. It is a cast-in-place reinforced concrete structure with loop-shaped column-side reinforcement bars 11 and loop-shaped beam-side reinforcement bars 21 arranged inside and combined as the main reinforcement.

[0035] Specifically, as shown in Figure 1, the joint 30 is formed by assembling the loop-shaped column-side reinforcement 11 and the loop-shaped beam-side reinforcement 21 together and positioning the beam member 20, with the loop-shaped beam-side reinforcement 21 protruding from the end face of the beam member 20, against the opposing surface 10a of the column member 10 from which the loop-shaped column-side reinforcement 11 protrudes. Then, appropriate reinforcement bars are placed around the assembled loop-shaped column-side reinforcement 11 and loop-shaped beam-side reinforcement 21, and concrete is poured to form a joint between the opposing surface 10a and the end face of the beam member 20, thereby joining and integrating the column member 10 and the beam member 20.

[0036] The bracket 40, which is fixed to the opposing surface 10a of the column member 10 and on which the beam member 20 is placed, consists of a bracket body 50 fixed to the opposing surface 10a, a sliding part 60 placed on the inclined upper surface 52 of the bracket body 50 and sliding in the opposing direction Wi, and an extension / retraction device 70 that expands and contracts in the width direction W.

[0037] As shown in Figure 4, the bracket body 50 is formed to have the same length as the column member 10 in the depth direction L, comprising a fixed surface 51 that extends vertically and is fixed to the opposing surface 10a, an inclined upper surface 52 that slopes toward the opposing direction Wi and toward the downward direction Hd at the upper end of the fixed surface 51, and a flange 53 that connects the fixed surface 51 and the inclined upper surface 52 at the inner corner and is arranged at a predetermined distance in the depth direction L.

[0038] The fixing surface 51, the inclined upper surface 52, and the flange 53 that constitute the bracket body 50 are made of steel plate material having a predetermined thickness, and the fixing surface 51 has bolt holes (not shown) through which bolts 13 (see Figure 5(a)) that are screwed into the form connector 12 are inserted.

[0039] As shown in Figure 4, the sliding portion 60, which is placed on the inclined upper surface 52 of the bracket body portion 50 described above, is formed to have the same length as the column member 10 in the depth direction L, with an inclined bottom surface 61 that is located in the downward direction Hd and inclined in the opposing direction Wi and toward the downward direction Hd, a mounting upper surface 62 that is opposite to the inclined bottom surface 61 in the height direction H, and a flange 63 that is connected to the inclined bottom surface 61 and the mounting upper surface 62 in the height direction H and is arranged at a predetermined interval in the depth direction L.

[0040] More specifically, the inclined bottom surface 61 is inclined at an angle corresponding to the inclined top surface 52 of the bracket body 50, the mounting top surface 62 is configured to be horizontal when the inclined bottom surface 61 is placed on the inclined top surface 52, and the sliding part 60 is formed in a roughly wedge shape when viewed from the side. Furthermore, the sliding portion 60 is formed to have a shorter width W than the bracket body portion 50.

[0041] The telescopic device 70 is formed of a jack that can extend freely in the opposing direction Wi. The telescopic device 70 is positioned between a slide portion 60, which has a shorter length in the width direction W than the bracket body portion 50, and the opposing surface 10a of the column member 10, and is configured to press the slide portion 60 toward the opposing direction Wi. Multiple telescopic devices 70 are arranged at predetermined intervals in the depth direction L.

[0042] With the bracket 40 configured in this way, the bracket body 50 is attached to the column member 10 by inserting a bolt 13 through a bolt hole provided in the fixing surface 51 of the bracket body 50 and screwing the bolt 13 into a form connector 12 provided on the opposing surface 10a. Then, the slide part 60 is placed on the bracket body 50 attached to the column member 10 with its inclined bottom surface 61 facing the inclined upper surface 52, and the telescopic device 70 is placed between the slide part 60 and the opposing surface 10a to complete the bracket 40.

[0043] In this configuration, the bracket 40 has a horizontal mounting surface 62 for the sliding portion 60. Furthermore, when the telescopic device 70 is extended using the opposing surface 10a as a reaction force, the sliding portion 60 moves in the opposing direction Wi.

[0044] As the sliding part 60 moves in the opposing direction Wi, as shown in Figures 2(c) and (d), the inclined bottom surface 61, which is inclined in the opposing direction Wi and downward Hd, slides on the inclined top surface 52, which is inclined in the opposing direction Wi and downward Hd, and the mounting top surface 62 moves downward Hd while maintaining a horizontal position.

[0045] The construction method for the rigid frame structure 1, in which each element is configured as described above, will be explained with reference to Figures 4 to 9. In the following explanation, one of the pair of column members 10 configured in the width direction W (the right side in the width direction W in Figure 1) will be described, but the opposite side (the left side in the width direction W in Figure 1) will be constructed in the same manner.

[0046] First, as shown in Figure 5(a), the bracket 40 is attached to the opposing surface 10a of the column member 10 (bracket attachment process (step s1)). Specifically, a bolt 13 is inserted through a bolt hole provided in the fixing surface 51 of the bracket body 50 that constitutes the bracket 40, and the bolt 13 is screwed into a form connector 12 provided on the opposing surface 10a to attach the bracket 40 to the column member 10.

[0047] As shown in Figure 5(b), the beam member 20 is positioned above the bracket 40 on the column member 10 to which the bracket 40 is attached. At this time, the beam member 20 is positioned such that the loop-shaped beam-side reinforcement 21, which protrudes outward from the end of the beam member 20 in the width direction W, is located above the loop-shaped column-side reinforcement 11, which protrudes in the opposing direction Wi from the opposing surface 10a of the column member 10 in the direction Hu.

[0048] As shown in Figure 6(a), the beam member 20 is moved downward to Hd and installed in a predetermined position so that the loop-shaped column-side reinforcement 11 of the column member 10 and the loop-shaped beam-side reinforcement 21 of the beam member 20 are assembled (beam installation process (step s2)). At this time, the bracket 40 is attached to the column member 10, and the end of the beam member 20 is placed on the horizontal mounting surface 62. As a result, the bracket 40 supports the end of the beam member 20, or in other words, the beam member 20 is supported by the column member 10 via the bracket 40.

[0049] With the beam member 20 positioned in a predetermined location relative to the column member 10, appropriate reinforcement bars are placed on the assembled loop-shaped column-side reinforcement bars 11 and loop-shaped beam-side reinforcement bars 21, and formwork (not shown) for pouring concrete is assembled. Then, as shown in Figures 6(b) and 8(a), concrete is poured into the formwork to construct the joint 30 (concrete pouring process (step s3)).

[0050] Then, as shown in Figure 7(a), once the poured concrete has hardened and reached a predetermined strength sufficient to remove the formwork, the unloading process is performed as shown in Figure 7(b) (step s4). In more detail, once a predetermined strength is achieved that allows the formwork to be removed, the expansion joint 70 is extended from the state shown in Figure 8(a), and the sliding part 60 is moved in the opposite direction Wi relative to the bracket body 50. As a result, as shown in Figure 8(b), the sliding part 60, whose inclined bottom surface 61 slides on the inclined top surface 52 of the bracket body 50, has its mounting top surface 62 moved in the opposite direction Wi and downward Hd, causing the bottom surface of the beam member 20 and joint 30 to be slightly separated from the mounting top surface 62 in the height direction H.

[0051] In the state shown in Figure 8(a), the loads on the beam member 20 and the joint 30 are acting on the bracket 40 in a downward direction Hd. However, when the mounting surface 62 moves downward in Hd and separates from the bottom surfaces of the beam member 20 and the joint 30, the downward load Hd acting on the bracket 40 is relieved.

[0052] In this way, with the load acting on the bracket 40 removed, the bracket 40 is removed from the column member 10 (bracket removal process (step s5)) as shown in Figure 9, and the construction of the rigid frame structure 1 is completed.

[0053] As described above, the method for constructing a rigid frame structure 1 in which a precast beam member 20 is joined at a joint 30 to a column member 10 from which a loop-shaped column-side reinforcing bar 11 protrudes from above the opposing surface 10a is as follows: a beam installation step (step s2) in which the end of the beam member 20 is set up to a bracket 40 provided below the joint 30 on the opposing surface 10a so as to be assembled to the loop-shaped column-side reinforcing bar 21 that protrudes from the end of the precast beam member 20 and the loop-shaped column-side reinforcing bar 21 By performing a concrete pouring step (step s3) in which concrete is poured into the assembly portion where the brackets are assembled to construct the joint 30, and a bracket removal step (step s5) in which the brackets are removed after the poured concrete has hardened and achieved a predetermined strength, a rigid frame structure 1 in which a precast beam member 20 is joined to a column member 10 from which loop-shaped column-side reinforcing bars 11 protrude from the opposing surface 10a at the joint 30 can be constructed without installing shoring to support the beam member 20.

[0054] More specifically, in the beam installation process (step s2), the end of the precast beam member 20 is installed so that the loop-shaped beam-side reinforcing bars 21 protruding from the end of the precast beam member 20 are assembled to the loop-shaped column-side reinforcing bars 11 with respect to a bracket 40 provided below the joint 30 on the opposing surface 10a. Therefore, the precast beam member 20 can be supported by the bracket 40 provided on the column member 10. Thus, there is no need to install scaffolding to support the beam member 20 before it is joined to the column member 10 at the joint 30.

[0055] Then, in the concrete pouring process (step s3), concrete is poured into the assembly area to construct the joint 30. After the poured concrete hardens and achieves the predetermined strength, the brackets 40, which become unnecessary when the construction of the rigid frame structure 1 is completed, can be removed.

[0056] As described above, since it is not necessary to install scaffolding to support the beam member 20 between the column member 10 and the joint 30, the rigid frame structure 1 can be constructed even in locations where scaffolding cannot be installed, and the time required for the installation and removal of scaffolding can also be shortened.

[0057] Furthermore, by performing a deloading step (step s4) to remove the load on the joint 30 acting on the bracket 40 before the bracket removal step (step s5), the load on the joint 30 acting on the bracket 40 is removed, making it easy to remove the bracket 40.

[0058] Furthermore, by extending the telescopic device 70, the sliding portion 60 moves in the opposite direction Wi, which intersects the downward direction Hd on which the load acts, causing the mounting surface 62 to lower, thus easily removing the load acting on the bracket 40.

[0059] The bracket 40 described above consists of a bracket body 50 having an inclined upper surface 52 that slopes toward the opposing direction Wi and downward direction Hd, a sliding part 60 having an inclined lower surface 61 that slopes toward the opposing direction Wi and downward direction Hd, and an extension / retraction device 70 that moves the sliding part 60 toward the opposing direction Wi, but the configuration is not limited to the above.

[0060] For example, as shown in Figure 10, the bracket 40a may have an expandable / contractable device 70a that can extend and contract in the height direction H. Specifically, with respect to the bracket body portion 50, whose inclined upper surface 52 is inclined toward the opposing direction Wi and the downward direction Hd, the bracket body portion 50a has a horizontal upper surface 52a formed horizontally, and the horizontal bottom surface 61a of the vertical sliding portion 60a is also formed horizontally.

[0061] Unlike the slide portion 60, which has a horizontal base surface 61a formed horizontally, the vertical slide portion 60a has a length in the width direction W that is shorter than the bracket body portion 50, and is formed to be approximately the same length as the bracket body portion 50a. Furthermore, the vertical sliding portion 60a is formed to have a longer length in the depth direction L than the bracket body portion 50a, and at both ends in the depth direction L, the side walls 64a extending in the height direction H are formed to protrude downward Hd from the horizontal bottom surface 61a.

[0062] Furthermore, unlike bracket 40, which has a sliding section 60 whose length in the width direction W is shorter than that of the bracket body 50 and which has an extendable device 70 that can extend in the width direction W positioned between the sliding section 60 and the opposing surface 10a, bracket 40a has an extendable device 70a that can extend in the height direction H positioned between the horizontal upper surface 52a of the bracket body 50a and the horizontal lower surface 61a of the vertical sliding section 60a.

[0063] In this configuration, the bracket 40a has multiple telescopic devices 70a arranged on the horizontal upper surface 52a of the bracket body 50a, and vertical sliding parts 60a are arranged so that the horizontal upper surface 52a and the horizontal lower surface 61a face each other via the telescopic devices 70a. At this time, the lower ends of the side surfaces 64 at both ends of the vertical sliding parts 60a in the depth direction L extend laterally to the bracket body 50a in the depth direction L.

[0064] To construct the rigid frame structure 1 using the bracket 40a configured in this way, the bracket 40a with the expansion joint 70a extended is attached to the column member 10 (bracket attachment process (step s1)), and the end of the beam member 20 is placed on the mounting surface 62a (beam installation process (step s2)). Alternatively, the bracket 40a of the column member 10 may be attached first, and then the telescopic device 70a may be extended so that the mounting surface 62a reaches a predetermined height.

[0065] Then, concrete is poured into the formwork assembled to construct the joint 30 (concrete pouring process (step s3)), and once the poured concrete has hardened and reached a predetermined strength that allows the formwork to be removed, the unloading process is performed (step s4).

[0066] In more detail, once a predetermined strength is achieved that allows the formwork to be removed, the extended expansion joint 70a is shortened. As a result, the mounting surface 62a of the upper and lower sliding section 60a moves downward Hd, and the mounting surface 62a is slightly separated from the bottom surface of the beam member 20 and the joint 30 in the height direction H, thereby relieving the load on the beam member 20 and the joint 30 that was acting downward Hd on the bracket 40a. In this way, with the load acting on the bracket 40a removed, the bracket 40a is removed from the column member 10 (bracket removal process (step s5)), and the construction of the rigid frame structure 1 is completed.

[0067] Thus, the method of constructing the rigid frame structure 1 using bracket 40a can produce the same effects as those achieved by the method of constructing the rigid frame structure 1 using bracket 40 described above.

[0068] Furthermore, the bracket 40a is equipped with an extension device 70a that shortens in the downward direction Hd where a load acts on the bracket 40a. In the unloading process (step s4), by shortening the extension device 70a, the mounting surface 62a is moved downward in the Hd direction, thereby unloading the bracket 40a.

[0069] Furthermore, since the bracket 40a is provided with side walls 64a on both sides in the depth direction L of the vertical sliding portion 60a that slides in the height direction H relative to the bracket body 50a, it is possible to prevent the vertical sliding portion 60a that slides in the height direction H from moving unintentionally in the depth direction L away from the bracket body 50a.

[0070] Furthermore, instead of using a bracket 40a with an expandable / contractable device 70a that can be extended or retracted in the height direction H, a bracket 40b may be used that has a support block 80 that has a predetermined compressive strength but can be collapsed by high water pressure or the like.

[0071] Bracket 40b has a bracket body 50a, an up-and-down sliding part 60a, and a support block 80. The bracket body 50a and the up-and-down sliding part 60a in bracket 40b have the same configuration as the bracket body 50a and the up-and-down sliding part 60a in bracket 40a, and their description is omitted.

[0072] The support block 80, used in place of the expansion joint 70a in the bracket 40a, is formed in the shape of a plate with a predetermined thickness and a planar shape similar to that of the horizontal top surface 52a and horizontal bottom surface 61a, by integrating granular material such as sand or powder with a binding agent to have a predetermined compressive strength. Specifically, the height of the support block 80 is formed so that, with the bracket 40b attached to the column member 10, the end of the beam member 20 can be placed on the mounting top surface 62a. Then, by spraying high-pressure water or the like towards the support block 80 and dousing the support block 80 with high-pressure water or the like, the granular material and powder that were held together by the consolidating material will break apart and collapse.

[0073] In the bracket 40b using the support block 80 as described above, the support block 80 is positioned between the horizontal upper surface 52a of the bracket body 50a and the horizontal lower surface 61a of the vertical sliding portion 60a, and the bracket is attached to the column member 10 (bracket attachment process (step s1)), and the end of the beam member 20 is placed on the mounting upper surface 62a (beam installation process (step s2)).

[0074] Then, concrete is poured into the formwork assembled to construct the joint 30 (concrete pouring process (step s3)), and once the poured concrete has hardened and reached a predetermined strength that allows the formwork to be removed, the unloading process is performed (step s4).

[0075] In more detail, once a predetermined strength is achieved that allows the formwork to be removed, high-pressure water or the like is sprayed onto the support block 80 positioned between the horizontal upper surface 52a and the horizontal lower surface 61a, causing the support block 80 to collapse. As a result, the vertical sliding part 60a moves downward in the Hd direction, causing the bottom surface of the beam member 20 and joint 30 to be slightly separated from the mounting upper surface 62a in the height direction H, and the load on the beam member 20 and joint 30 that was acting downward in the Hd direction on the bracket 40b is relieved. In this way, with the load acting on the bracket 40b removed, the bracket 40b is removed from the column member 10 (bracket removal process (step s5)), and the construction of the rigid frame structure 1 is completed.

[0076] Thus, the method of constructing the rigid frame structure 1 using bracket 40b can produce the same effects as those achieved by the method of constructing the rigid frame structure 1 using bracket 40 described above.

[0077] Furthermore, the bracket 40b has a support block 80 positioned between the bracket body 50a and the vertical sliding portion 60a. In the unloading process (step s4), high-pressure water or the like is sprayed toward the support block 80, causing the support block 80 to collapse. This moves the mounting upper surface 62a downwards to Hd, thereby unloading the bracket 40a.

[0078] Furthermore, instead of using a bracket 40a with an expandable / contractable device 70a that can expand and contract in the height direction H, a bracket 40c may be used that has a support back 90 that has a predetermined compressive strength but can discharge granular material from inside.

[0079] Bracket 40c has a bracket body 50a, an up-and-down sliding part 60a, and a support back 90. ​​The bracket body 50a and the up-and-down sliding part 60a in bracket 40c have the same configuration as the bracket body 50a and the up-and-down sliding part 60a in bracket 40a, and their description is omitted.

[0080] The support bag 90, used in place of the expansion joint 70a in the bracket 40a, includes a bag body 91 that can contain a fluid such as water, and a valve 92 that communicates with the inside of the bag body 91 and introduces fluid into the bag body 91 or discharges the fluid sealed inside.

[0081] The bag body 91 is formed to have a plan view shape similar to that of the horizontal top surface 52a and the horizontal bottom surface 61a, and is formed to have a predetermined thickness when fluid is sealed inside the bag body 91. Specifically, the height of the bag body 91 is formed so that the end of the beam member 20 can be placed on the mounting top surface 62a when the bracket 40c is attached to the column member 10. Furthermore, the height of the support bag 90 can be reduced by opening the valve 92 and discharging the fluid sealed inside the bag body 91.

[0082] In the bracket 40c using the support bag 90 as described above, the support bag 90 is placed between the horizontal upper surface 52a of the bracket body 50a and the horizontal lower surface 61a of the vertical sliding part 60a, and with the bag body 91 of the support bag 90 sealed with fluid, it is attached to the column member 10 (bracket attachment process (step s1)), and the end of the beam member 20 is placed on the mounting upper surface 62a (beam installation process (step s2)).

[0083] Alternatively, after attaching the bracket 40c to the column member 10, the bag body 91 may be inflated by sealing a fluid inside it through the valve 92 so that the mounting surface 62a reaches a predetermined height.

[0084] Then, concrete is poured into the formwork assembled to construct the joint 30 (concrete pouring process (step s3)), and once the poured concrete has hardened and reached a predetermined strength that allows the formwork to be removed, the unloading process is performed (step s4).

[0085] In more detail, once a predetermined strength is achieved that allows the formwork to be demolded, the valve 92 in the support bag 90 positioned between the horizontal upper surface 52a and the horizontal lower surface 61a is opened, and the fluid sealed inside the bag body 91 is discharged. As a result, the vertical sliding portion 60a moves downward in the Hd direction, causing the bottom surface of the beam member 20 and joint 30 to be slightly separated from the mounting upper surface 62a in the height direction H, and the load on the beam member 20 and joint 30 that was acting downward in the Hd direction on the bracket 40c is relieved. In this way, with the load acting on the bracket 40c removed, the bracket 40c is removed from the column member 10 (bracket removal process (step s5)), and the construction of the rigid frame structure 1 is completed.

[0086] Thus, the method of constructing the rigid frame structure 1 using bracket 40c can produce the same effects as those achieved by the method of constructing the rigid frame structure 1 using bracket 40 described above.

[0087] Furthermore, the bracket 40c has a support bag 90 positioned between the bracket body 50a and the vertical sliding portion 60a. In the unloading process (step s4), the fluid sealed inside the bag body 91 of the support bag 90 is discharged from the valve 92, thereby moving the mounting upper surface 62a downward to Hd and unloading the load acting on the bracket 40a.

[0088] Furthermore, in the rigid frame structure 1 described above, loop-shaped column-side reinforcement bars 11 protrude in the opposing direction Wi from the opposing surface 10a of the column member 10, and loop-shaped beam-side reinforcement bars 21 protrude outward in the outward direction Wo from both ends of the beam member 20, and a joint 30 is constructed between the opposing surface 10a and the end of the beam member 20. However, as shown in Figure 13, a joint 130 may be constructed above the column member 110.

[0089] Figure 13(a) shows a front view before the column member 110 and beam member 120 are assembled, Figure 13(b) shows a front view after the column-side main reinforcement 111 extending upward Hu from the upper end of the column member 110 and the beam-side main reinforcement 121 extending outward Wo from the end of the beam member 120 are assembled, and Figure 13(c) shows a front view of the constructed rigid frame structure 100.

[0090] The rigid frame structure 100 shown in Figure 13(c) has joints 130 at its corners. Therefore, the column members 110 of the rigid frame structure 100 are formed to be lower in height by the height of the joints 130 compared to the column members 10 of the rigid frame structure 1. Also, the beam members 120 are formed to be longer in the width direction W by the length of the joints 30 of the rigid frame structure 1 compared to the beam members 20 of the rigid frame structure 1.

[0091] Furthermore, the column-side main reinforcement bars 111 extend upward Hu from the upper end of the column member 110 to the height of the joint 130, and the beam-side main reinforcement bars 121 extend outward Wo from both ends of the beam member 120 to the length of the joint 130. The bracket 40 is then fixed to the column member 110 such that its mounting surface 62 coincides with the upper end of the column member 110.

[0092] The beam member 120 is positioned relative to the column member 110 such that the end of the beam member 120 is placed on the mounting surface 62 of the bracket 40 provided on the column member 110, and the column-side main reinforcement bars 111 of the column member 110 and the beam-side main reinforcement bars 121 of the beam member 120 are assembled.

[0093] Then, formwork is assembled at the location where the joint 130 is to be constructed, concrete is poured, and once the poured concrete has reached the required strength, as described above, the expansion joint 70 on the bracket 40 is extended to relieve the load acting on the bracket 40, the bracket 40 is removed, and the construction of the rigid frame structure 100 is completed.

[0094] The ramen structure 100, configured in this way and constructed as described above, can achieve the same effects and benefits as the construction method used to construct the ramen structure 1 described above. Of course, brackets 40a, 40b, and 40c may also be used in the construction method of the ramen structure 100, and in that case as well, the same effects and advantages as the construction method of the ramen structure 1 using brackets 40a, 40b, and 40c described above can be achieved.

[0095] In the correspondence between the structure of this invention and the embodiments described above, The column-side reinforcement of this invention corresponds to the loop-shaped column-side reinforcement 11 and the column-side main reinforcement 111. The same applies to the following: The column members correspond to column members 10 and 110. The beam members correspond to beam members 20 and 120. The joint corresponds to joints 30 and 130. The joint structure corresponds to the rigid frame structure 1,100. The side of the column member corresponds to the opposing surface 10a, The support members correspond to brackets 40, 40a, 40b, and 40c. The beam-side reinforcement corresponds to the loop-shaped beam-side reinforcement 21 and the beam-side main reinforcement 121. The beam installation process corresponds to the beam installation process (step s2), The concrete placement process corresponds to the concrete placement process (step s3), The support member removal process corresponds to the bracket removal process (step s5). The unloading process corresponds to the unloading process (step s4), The direction of action corresponds to the downward direction Hd. The extension mechanism corresponds to the extension devices 70, 70a, The support surface lowering means and load removal means correspond to the slide section 60 and telescopic device 70, the upper and lower slide section 60a and telescopic device 70a, the support block 80, and the support back 90. The support surfaces correspond to the mounting upper surface 62 and the mounting upper surface 62a, but this invention is not limited to the configuration of the above-described embodiment, and many other embodiments can be obtained.

[0096] For example, at least one of the bottom surface of the inclined bottom surface 61 and the top surface of the mounting top surface 62 of the sliding part 60, which moves in the opposing direction Wi between the bottom surface of the beam member 20 and the joint part 30 and the inclined top surface 52, may be subjected to a low-friction process to reduce friction. This reduces the load when the sliding part 60 is moved in the opposing direction Wi by the expansion joint 70. Furthermore, side walls 64a of the upper and lower sliding parts 60a may be provided at both ends of the sliding part 60 in the depth direction L of the bracket 40.

[0097] Furthermore, while the above description described a gate-shaped rigid frame structure 1 in which a beam member 20 is stretched across a pair of column members 10 and joined at a joint 30, it is also possible to construct the structure by stretching a beam member 20 across multiple column members 10 arranged in multiple directions relative to one column member 10 and joining them at a joint 30. In that case, brackets 40 are attached to the opposing surfaces 10a of each column member 10 in opposing directions, and the ends of each beam member 20 are placed on the brackets 40 to construct the rigid frame structure. This makes it possible to achieve the same effects as the rigid frame structure 1 using brackets 40 described above.

[0098] Furthermore, although the above description described a rigid frame structure 1 in which a pair of column members 10 and a beam member 20 spanning the column members 10 are rigidly connected, it may also be a cantilever structure in which a short beam member 20 extends from the column members 10 in a cantilevered manner. [Explanation of Symbols]

[0099] 1,100... Ramen structure 10,110...Column member 10a... Opposing surface 11,111... Loop-shaped column-side reinforcement bars 20,120…beam members 21,121... Loop-shaped beam side reinforcement 30,130...Joint part 40, 40a, 40b, 40c… brackets 60a...Slide section 60a... Upper and lower sliding part 62.62a… Mounting surface 70,70a…Expansion device 80…Support block 90...Support back Hd...downward s2…beam installation process s3…Concrete pouring process s4…Unloading process s5…Bracket removal process

Claims

1. A method for constructing a joint structure in which a precast beam member is joined to a column member from which column-side reinforcing bars protrude from the end, A beam installation step involves setting the end of the beam member so that the beam-side reinforcing bars protruding from the end of the precast beam member are attached to the column-side reinforcing bars with respect to a support member provided below the joint on the side of the column member, A concrete pouring step to construct the joint by pouring concrete into the assembly portion where the column-side reinforcement and the beam-side reinforcement are assembled, After the poured concrete has hardened and achieved a predetermined strength, a support member removal step is performed in which the support member is removed. Before the removal of the support member, A loading removal process is performed to remove the load on the joint acting on the support member. Method for constructing a jointed structure.

2. The support member is provided with an expandable / contractible means that expands and contracts in the direction in which the load acts, and in the unloading process, the expandable / contractible means is retracted. A method for constructing the joint structure described in claim 1.

3. The support member is provided with a support surface lowering means for lowering the support surface that supports the end of the beam member, In the unloading step, the support surface of the support surface lowering means is lowered. A method for constructing the joint structure described in claim 1.

4. The support surface is lowered by the support surface lowering means moving in an intersecting direction that is perpendicular to the direction in which the load is applied. A method for constructing the joint structure described in claim 3.

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