JP7330048B2 - Column-beam connection structure construction method and column-beam connection structure - Google Patents

Description

The present invention relates to a construction method for constructing a beam-to-column joint structure and a beam-to-column joint structure.

When the columns and beams of a reinforced concrete structure (RC structure) building are precast (hereinafter sometimes abbreviated as "PCa") members, the beam main reinforcement at the column-to-beam joint is through reinforcement, or In many cases, it becomes a mechanical joint in the column-to-beam joint (see, for example, Patent Document 1). On the other hand, several construction methods have been proposed in which PCa is used for column-to-beam joints, and two construction methods, the LRV method and the scrim method, have been put into practical use as construction methods in which all members, including column-to-beam joints, are made of PCa. ing.

(1) LRV construction method
Figure 6 shows an outline of the LRV construction method (Left Right Vertical Method). In this construction method, as shown in Fig. 6(a), the beam main reinforcement of the PCa beam (LR beam) extending half span in both directions from the PCa column-to-beam joint is attached to the mechanical joint built into the PCa beam to be joined. Grouted. After joining the PCa beam, as shown in Fig. 6(b)(c), the column main reinforcement at the bottom end of the PCa column (surplus length ≥ joint height + fixing length) penetrates the column main reinforcement through-hole at the PCa column-to-beam joint. In addition, the basic mechanism is to fix the grout to the mechanical joint built into the PCa column (V column) one layer below.

(2) Scrim-H Construction Method Fig. 7 shows an outline of the Scrim-H construction method (Sumitomo Mitsui Quick RC Integration-Horizontal Method). As shown in Figures 7(a) to (d), in this construction method, the PCa column has a shape in which the upper part is integrated with the column-to-beam joint. ), and the basic mechanism is to penetrate the PCa column-to-beam joint from one side and grout to the female hole (mechanical joint) of the PCa beam on the other side. Basically, the construction procedure is to sequentially assemble in one direction from one end.

(3) TT-JOINT construction method In addition, the TT-JOINT construction method fixes fixing hardware from both directions at the center of the joint between beams and columns, pours fiber reinforced concrete at the joints between beams and columns, and arranges shear reinforcing bars. It is a construction method that does not.

Further, Patent Document 2 discloses a PC column comprising first and second PC beams having main beam connecting joints embedded in the beam ends, and joint panels having main beam holes into which relay bars are inserted. In the joining method of the beam joint structure, the relay reinforcement inserted into the beam main reinforcement hole is inserted from the right end of the joint panel into the joint for connecting the beam main reinforcement of the first PC beam arranged on the left side of the joint panel, and then After inserting the relay reinforcement protruding from the right end of the joint panel into the joint for connecting the beam main reinforcement of the second PC beam, grout is injected from the grout injection hole that communicates the outer surface of the joint panel and the beam main reinforcement hole, and is relayed. By fixing the reinforcement to the main beam hole and the joint for connecting the main beam, the right end of the PC beam located on the left side of the connection panel is joined to the connection panel, and the left end of the PC beam located on the right side is joined. It is disclosed that the section is also joined to the connection panel (Fig. 12).

JP 2017-179997 A JP-A-2006-22494

All of the above-mentioned construction methods aim to change the way of thinking, which has been considered common sense until now, by penetrating the entire member on one side and fixing it to the member on the other side. It is an epoch-making joint method that integrates within the member by fixing from both sides at the center of the member.

However, each of these construction methods has limitations and weak points. As for the previous two construction methods, it is presumed that the construction method is different from the standard construction method in terms of the fitting at the final span and the construction method. In addition, since the end faces of the beam PCa members are in direct contact with each other, interface processing of that portion poses a problem. In addition, in the Scrim H construction method, the beam main reinforcement penetrates the joint at the top of the column and is inserted into the beam PCa on the opposite side. Shoring is required to hold the , which may affect the cycle process. In addition, the PCa beams to which the main beams are anchored must have a rectangular cross-section in order to secure the anchoring part, but on the other hand, in the connection with the slab, it is difficult to anchor the reinforcing bars.

Regarding the latter one method, the joints between columns and beams are not made of PCa members, but are cast in place with special concrete. , it is presumed that structural verification will be required each time.

Improvements in productivity are being called for in both construction and civil engineering, and it goes without saying that the conversion of components to PCa (factory production) greatly contributes to productivity improvement. The greater the scope of its application, the less the on-site construction labor and the shorter the construction period. Various construction methods have been proposed and put into practical use for each member of columns and beams, but it must be said that column-to-beam joints and slabs are still under development.

Regarding the beam-to-column joints, in addition to the main reinforcement of the column, the required amount of shear reinforcing reinforcement is included, and the main reinforcement of the beam enters from both the XY directions, and in the lower part, it enters as a two-step reinforcement, so both the column and the beam main reinforcement It must be said that it is extremely difficult to form a joint within the joint.

In the LRV construction method, the column main reinforcement extending from the lower end of the upper PCa column, and in the Scrime-H construction method, the beam main reinforcement extending from the PCa beam that joins from one direction to the joint side penetrates the column-to-beam joint. It is based on a joining method in which grout is fixed to joints housed in end members. However, in these construction methods, since the frames between spans are built while sequentially joining members from one side, the construction procedure is from the flat end of the building to the other end in both the X and Y directions, and the final end will eventually be Also, the beam main reinforcement of the PCa beam member is inserted into the final member and fixed. In that case, if there is a construction method for PCa column-to-beam joints that can fix the beam main reinforcement from both directions, it will not only be possible to apply it as the final end member, but also PCa from both ends of the building plane toward the center. It becomes possible to assemble the members. Therefore, in Japanese Patent Application No. 2018-54359, the present inventor places a mechanical filling joint in the center of the flat cross section of the column-to-beam joint, and joins the beam PCa from both sides to which the main reinforcement of the fixed beam is extended. A beam joint structure was proposed.

The PC column/beam joint structure of Patent Document 2 is clear from FIG. It does not have a mechanism to securely fix the beam main reinforcement to the PC beam.

In view of the problems of the prior art as described above, the present invention provides a construction method for a beam-to-column joint structure capable of reliably joining and fixing precast beam members to beam-to-column joints by precasting from two or four directions, and An object of the present invention is to provide a column-to-beam connection structure.

The construction method of the beam-to-column joint structure for achieving the above-mentioned purpose is a method of constructing the beam-to-column joint structure by joining one precast beam member and the other beam member to the beam-to-column joint by precasting. a plurality of vertical grooves are formed in a horizontal hole through which the beam main reinforcement penetrates at the column-to-beam joint and a joint surface to be joined to the beam member;
In the two beam members, a mechanical filling joint is embedded in advance at a position at a predetermined distance from the beam member end, and an insertion hole extending from the beam member end to the mechanical filling joint and a joint surface to be joined with the column-to-beam joint. A plurality of longitudinal grooves are formed in the joint surface, and the longitudinal lower end of the longitudinal groove on the joint surface is bottomed,
When installing the one beam member to the beam-to-column joint, the beam main reinforcement is inserted into the insertion hole of the one beam member through the horizontal hole of the beam-to-column joint on the opposite side of the beam member. placing a tip portion within the mechanical fill joint;
Next, install the other beam member so that the beam main reinforcement protruding from the column-to-beam joint on the opposite side of the one beam member is inserted into the insertion hole of the other beam member, disposing the tip portion of the beam main reinforcement protruding from the beam-to-column joint in the mechanical filling joint of the other beam member;
Next, the mechanical filling joint is filled with a filling material, the beam main reinforcement and the beam main reinforcement on the beam member side are joined in the mechanical filling joint, and the beam main reinforcement and the horizontal hole and the horizontal hole are joined together. Filling the gap between the inside of the insertion hole with a filler, fixing the beam main reinforcement in the horizontal hole and in the insertion hole,
After the beam main reinforcement is joined, the vertical groove is filled with a filler to ensure adhesion at the joining surface.

According to this column-to-beam joint structure construction method, in the precast process of beam members and column-to-beam joints, horizontal holes through which the beam main reinforcement penetrates are formed in the column-to-beam joints, and the beam members are provided at a predetermined distance from the ends of the beam members. A mechanical filling joint is embedded at the position of , and an insertion hole is formed from the end of the beam member to the mechanical filling joint. Installed at the beam joint, insert the beam main reinforcement into the insertion hole of one of the beam members through the horizontal hole of the column-beam joint on the opposite side of the one beam member, place the tip part in the mechanical filling joint, and The other beam member is installed by inserting the beam main reinforcement protruding from the beam joint into the insertion hole of the other beam member, the tip portion is placed in the mechanical filling joint, and then the mechanical filling is performed. The joint is filled with filler, the beam main reinforcement and the beam main reinforcement on the beam member side are joined in the mechanical filling joint, and the gap between the beam main reinforcement and the inside of the horizontal hole and the insertion hole is filled with filler. The beam main reinforcement can be fixed in the horizontal hole and the insertion hole. In addition, by forming a plurality of vertical grooves in advance on each joint surface between the two beam members and the beam-to-column joint, and filling the vertical groove with filler after joining the beam main reinforcement to ensure adhesion at the joint surface. , it is possible to prevent the occurrence of an opening or the like at the outer periphery of the joint surface. In this way, the precast beam members can be reliably joined to the precast column-to-beam joint from two or four directions.

In the construction method of the beam-to-column joint structure, it is preferable that the distance from the end of the beam member to the center position of the mechanical filling joint in the horizontal direction is equal to or greater than the beam height of the beam member.

In addition, an injection pipe for the filler is previously embedded in at least one of the beam-to-column joint or the two beam members so as to communicate with the horizontal hole or the insertion hole, and the filler is injected from the injection pipe into the It is preferable to fill the mechanical filling joint, the lateral hole and the insertion hole.

Moreover, it is preferable that the horizontal hole and the insertion hole are formed by a sheath tube preliminarily embedded in the column-to-beam joint and a sheath tube preliminarily embedded in the beam member.

A beam-to-column joint structure for achieving the above object is a beam-to-column joint structure in which one precast beam member and the other beam member are joined to a precast beam-to-column joint,
The column-to-beam joint has a horizontal hole through which the beam main reinforcement penetrates, and the two beam members are a mechanical filling joint embedded at a predetermined distance from the end of the beam member, and a mechanical joint from the end of the beam member. an insertion hole extending to the type-fill joint;
A beam main reinforcement passes through the horizontal hole of the beam-to-column joint and the insertion hole of one of the beam members, the tip portion of which is located in the mechanical filling joint, and the beam main reinforcement protruding from the beam-to-column joint is penetrates the insertion hole of the other beam member and the tip portion thereof is located in the mechanical filling joint;
The beam main reinforcement and the beam main reinforcement on the beam member side are joined in the mechanical filling joint by the filler filled in the mechanical filling joint, and the beam main reinforcement and the horizontal hole and the insertion hole are connected. The beam main reinforcement is fixed in the horizontal hole and the insertion hole by a filler filled in the gap between
Each joint surface between the beam member and the column-to-beam joint is provided with a plurality of vertical grooves formed in advance and having bottomed bottom ends in the vertical direction. is ensured.

According to this column-to-beam joint structure, the beam main reinforcement passes through the horizontal hole of the column-to-beam joint and the insertion hole of one of the beam members, and the tip portion thereof is positioned in the mechanical filling joint of one of the beam members. The beam main reinforcement protruding from the beam member passes through the insertion hole of the other beam member, and its tip portion is positioned in the mechanical filling joint of the other beam member. The beam main reinforcement is joined to the beam main reinforcement on the beam member side, and the beam main reinforcement is fixed in the horizontal hole and the insertion hole by the filling material filled in the gap between the beam main reinforcement and the horizontal hole and the insertion hole. can be done. In addition, each joint surface between the beam member and the column-to-beam joint has a plurality of pre-formed vertical grooves filled with filler after the beam main reinforcement is joined. It is possible to prevent the occurrence of opening in the In this way, it is possible to realize a beam-to-column joint structure in which precast beam members are reliably joined to a beam-to-column joint by precast from two or four directions.

In the beam-to-column joint structure, it is preferable that the distance from the end of the beam member to the center position of the mechanical filling joint in the horizontal direction is equal to or greater than the beam height of the beam member.

According to the present invention, it is possible to provide a construction method for a beam-to-column joint structure and a beam-to-column joint structure in which precast beam members can be reliably joined and fixed to a beam-to-column joint by precast from two or four directions. can.

FIG. 4 is a cross-sectional view showing a beam-to-column joint structure in which a first PCa beam member and a second PCa beam member are joined to a PCa beam-to-column joint in the present embodiment. FIG. 2 is a plan view (b) showing the joint surface of the first PCa beam member and the main part top view (a) of the joint surface between the first PCa beam member and the PCa column-to-beam joint of FIG. . 4 is a flow chart for explaining steps S01 to S12 of a construction method for a column-to-beam joint structure according to the present embodiment. 4A to 4C are sectional views of each part in each step of the construction method of the beam-to-column joint structure according to the present embodiment. FIG. 4(a) to 4(c) are cross-sectional views of each part in each step continuing from FIG. 4(c). It is a diagram showing main steps (a) to (c) of the conventional LRV construction method. Fig. 3 is a diagram showing the main steps (a) to (d) of the conventional Scrim-H construction method.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated using drawing. FIG. 1 is a cross-sectional view showing a column-to-beam joint structure in which a first PCa beam member and a second PCa beam member are joined to PCa column-to-beam joints in this embodiment. Fig. 2 is a top view (a) of the main part of the joint surface between the first PCa beam member and the PCa column-to-beam joint of Fig. 1 and a plan view (b) showing the joint surface of the first PCa beam member ).

As shown in FIG. 1, the beam-to-column joint structure 10 according to the present embodiment is a reinforced concrete structure, in which the beam main reinforcement 14 made of reinforcing bars penetrated through the PCa beam-to-column joint 11 is connected to the first PCa beam member 12 and the second PCa beam member 12 . The first PCa beam member 12 and the second PCa beam member 13 are joined to the PCa column-to-beam joint 11 by joining with mechanical filling joints 15 and 16 in the PCa beam member 13 .

At the PCa column-to-beam joint 11, a plurality of column main reinforcements 11d and a plurality of in-column shear reinforcements 11e orthogonally connected to the column main reinforcements 11d are arranged. A plurality of sheath tubes 17 made of steel pipes into which the main reinforcements 14 are inserted are arranged corresponding to the positions of the beam main reinforcements 14 . Each sheath tube 17 constitutes a lateral hole penetrating in the horizontal direction.

A plurality of main beam reinforcements 12a, 13a and a plurality of shear reinforcements 12b, 13b orthogonally connecting to the main beam reinforcements 12a, 13a are arranged on the first and second PCa beam members 12, 13, respectively. there is The plurality of beam main reinforcements 12a and 13a are arranged two by two in upper and lower stages.

Further, in the first and second PCa beam members 12 and 13, when precast, mechanical filling joints 15 and 16 are arranged at predetermined distances in the horizontal direction from the beam member ends, respectively, indicated by broken lines in FIG. As shown, sheath pipes 18, 19 made of steel pipes are arranged from the mechanical filling joints 15, 16 to the end of the beam member, and the mechanical filling joints 15, 16 and the sheath pipes 18, 19 are beam main bars 12a, 12a made of reinforcing bars. 13a and shear reinforcing bars 12b, 13b are embedded. Beam main reinforcements 12a and 13a are inserted into one side of the mechanical filling joints 15 and 16 and fixed by a filling material such as a ground material. The PCa beam members 12 and 13 are formed with insertion holes through which the beam main reinforcements 14 are inserted by the sheath tubes 18 and 19 . A plurality of mechanical filling joints 15, 16 and sheath tubes 18, 19 are installed corresponding to the number of beam main reinforcements 12a, 13a.

The sheath tubes 17, 18, 19 have inner diameters larger than the diameter of the beam main reinforcement 14, and spiral grooves are formed on the inner peripheral surfaces thereof. Filling material such as grout material filled in the gap between the inner peripheral surface of the sheath pipes 17 to 19 and the beam main reinforcement 14 inserted in the sheath pipes 17 to 19 forms the beam main reinforcement anchoring portion, ensuring reliable anchoring force. is obtained.

A plurality of injection tubes 20 are embedded in advance in the PCa column-to-beam joint 11 so as to extend from the upper surface 11 a to a plurality of sheath tubes 17 . Filling material such as grout material is injected through each injection pipe 20 from the injection port formed in the upper surface 11a and filled into the mechanical filling joints 15 and 16 through the gaps between the beam main reinforcement 14 and the sheath pipes 17, 18 and 19, Furthermore, each gap is filled. By filling the filler material, the beam main reinforcement 14 is joined to the beam main reinforcement 12a, 13a within the mechanical filling joints 15, 16. As shown in FIG. In addition, the gaps in the sheath pipe 17 in the PCa column-to-beam joint 11 and the gaps in the sheath pipes 18 and 19 of the PCa beam members 12 and 13 are filled with a filling material to form main beam anchorages. 14 is fixed.

Also, the coupler length Lc of the mechanical filling joints 15 and 16 shown in FIG. The fixing length L of the main beam reinforcement 14 to the part is determined by the specification of the mechanical filling joint to be used, but the fixing length L of the main beam reinforcement 14 is at least the height of the PCa beam members 12 and 13 (beam height) H (L≧H). By setting the anchorage length L of the beam main reinforcement 14 to at least the beam height H, the anchorage length L longer than the yield hinge length can be secured in the PCa beam members 12 and 13, and the beam main reinforcement 14 can be secured to the PCa beam members 12 and 13. can be fixed securely. Note that the upper limit of the fixing length L is preferably determined from economic rationality.

As shown in FIGS. 2(a) and 2(b), when the PCa column-to-beam joint 11 and the first and second PCa beam members 12 and 13 are joined, a plurality of cavities are formed on the joint surface, which is the interface between them. In order to form an injection hole 21 , a plurality of vertical grooves are formed on each joint surface of the PCa column-to-beam joint portion 11 and the first and second PCa beam members 12 and 13 , for example, the joint surface 12 c of the first PCa beam member 12 . A groove 21a is formed during the manufacture of the precast member. A plurality of similar vertical grooves are also formed on the joint surface (not shown) of the PCa column-to-beam joint 11 . Each injection hole 21 does not penetrate downward in the vertical direction, and has a bottom portion 21b at the lower end in the vertical direction.

After the PCa column-to-beam joint 11 and the first and second PCa beam members 12 and 13 are joined, a filler such as a ground material is injected into the plurality of injection holes 21 formed by the vertical grooves 21a and the like to fill the joint surfaces. Ensure adhesion. Although the injection hole 21 has a circular shape when viewed from above as shown in FIG. 2(a), it may be oval or square, for example.

Next, steps S01 to S12 of the construction method for the beam-to-column joint structure according to the present embodiment will be described with reference to FIGS. 1 to 5. FIG. FIG. 3 is a flow chart for explaining the steps S01 to S12 of the method for constructing a column-to-beam joint structure according to this embodiment. 4A to 4C are cross-sectional views of each part in each step of the construction method of the beam-to-column joint structure according to the present embodiment. 5A to 5C are cross-sectional views of each part in each step continuing from FIG. 4C.

First, as shown in FIG. 4(b), the first PCa beam member 12 is installed (S01) at the PCa column-to-beam joint 11 of FIG. The position is adjusted (S02).

Next, as shown in FIG. 4(c), each sheath tube 17 opened in the side surface of the PCa column-to-beam joint 11 on the opposite side of the first PCa beam member 12 is inserted with a beam main reinforcement 14 of a predetermined length ( S03), and adjust the position of the beam main reinforcement 14 (S04).

Next, as shown in FIG. 5( a ), the beam main reinforcement 14 is located inside the first PCa beam member 12 and its one end 14 a is positioned inside the mechanical filling joint 15 , and the beam main reinforcement 14 is located opposite the PCa column-to-beam joint 11 . With the second PCa beam member 13 protruding from the side by the fixing length L (Fig. 1), as shown in Fig. 5(b), the second PCa beam member 13 is installed on the PCa column-to-beam joint 11 so as to swallow the protruding beam main reinforcement 14. (S05), a support member for supporting the second PCa beam member 13 is attached and its position is adjusted (S06).

Next, as shown in FIG. 5(c), the beam main reinforcement 14 is positioned inside the first PCa beam member 12 with one end 14a inside the mechanical filling joint 15 and inside the second PCa beam member 13 with the other end 14b. is located in the mechanical filling joint 16, a filling material such as grout material is passed through each injection pipe 20 from the injection port of the upper surface 11a of the PCa column-to-beam joint 11, and further sheath pipes 17, 18, 19 and Inject and fill the gap between one end 14a and the other end 14b of the main beam reinforcement in the mechanical filling joints 15 and 16 through the gap between the beam main reinforcement 14 (S07). Next, the cured state of the filler in the mechanical filler joints 15 and 16 is checked (S08).

Next, a filler such as a grout material is further injected through each injection pipe 20 in the PCa column-beam joint 11, and the sheath pipe 17 in the PCa column-beam joint 11 and the sheath in the first PCa beam member 12 are injected. A filling material such as a grout material is filled in each gap between the pipe 18 and the sheath pipe 19 in the second PCa beam member 13 and the beam main reinforcement 14 (S09). The gap filled with the filler such as the grout becomes the main beam fixing portion. Next, the cured state of the filler such as grout in the main beam fixing portion is checked (S10).

As described above, the beam main reinforcement 14 is joined to the beam main reinforcement 12a of the first PCa beam member 12 at the mechanical fill joint 15 in the first PCa beam member 12 and the second PCa beam member 12 as shown in FIG. The beam main reinforcement 13a of the second PCa beam member 13 can be joined to the beam main reinforcement 13a of the second PCa beam member 13 at the mechanical filling joint 16 in the beam member 13, and the beam main reinforcement 14 is connected to the sheath pipe 17 (horizontal hole) in the PCa column-to-beam joint 11. It can be fixed in the sheath tube 18 (insertion hole) in the first PCa beam member 12 and in the sheath tube 19 (insertion hole) in the second PCa beam member 13 . In this manner, the first and second PCa beam members 12 and 13 are joined to the PCa column-to-beam joint 11 .

Next, as shown in FIGS. 2(a) and 2(b), a plurality of injection holes 21 formed in the joint surfaces between the PCa column-to-beam joint 11 and the first and second PCa beam members 12 and 13 are injected from above. A filling material such as a ground material is injected and filled (S11). The adhesive force obtained by filling the filler such as the grout material can restrict the behavior such as the opening and displacement of the joint surface (interface). In addition to joining the PCa column-to-beam joint 11 and the first and second PCa beam members 12 and 13 with the beam main reinforcement 14, by securing the adhesive force at the joint surface, problems such as opening at the outer circumference of the joint surface are eliminated. can be prevented from occurring. Each injection hole 21 has a bottom portion 21b, and the inside of the injection hole 21 is filled with a filler.

Next, it moves to the next PCa column-to-beam joint (S12), and repeats the same steps.

As described above, according to the construction method of the beam-to-column joint structure of the present embodiment, the precast beams can be reliably joined and fixed to the beam-to-column joints by precast from two or four directions.

In addition, regarding this construction method, the required structural performance was confirmed by a structural performance confirmation test in which the dimensions, bar arrangement, and concrete strength of each member of the PCa column-to-beam joint 11 and the first and second PCa beam members 12 and 13 were the same. After verifying, it will be put into practical use. In addition, the ratio of lateral reinforcing bars (shear reinforcing bars) in the PCa column-to-beam joints 11 shall be 0.2% or more, but this will also be applied after verification by structural performance confirmation experiments.

Although the embodiments for carrying out the present invention have been described above, the present invention is not limited to these, and various modifications are possible within the scope of the technical idea of the present invention. For example, in the present embodiment, an injection pipe for injecting a filler such as a grout material is provided at the column-to-beam joint, but the present invention is not limited to this, and may be provided on the beam side.

In addition, the PCa beam members 12 and 13 may also be separately provided with injection pipes in advance to inject the filler such as grout material, and the beam main reinforcement 14 and the beam main reinforcement 14 may be mechanically injected from the injection pipes previously provided in the PCa beam members 12 and 13 . After filling the gap between the filling joints 15 and 16 with the filling material and confirming the hardening, next, the beam main reinforcement 14 and the sheath pipes 17, 18 and 19 from the injection pipe 20 of the PCa column-to-beam joint 11 The gap between them may be filled with a filler such as grout material. In other words, by providing another injection pipe to the PCa beam members 12 and 13 in addition to the injection pipe 20 of the PCa column-to-beam joint 11, filling in the mechanical filling joint and filling the gap in the sheath pipe can be achieved. The order can be changed as needed. In either case, the beam main reinforcement 14 is joined and fixed by hardening the filler such as grout, and the first and second PCa beam members 12 and 13 are joined to the PCa column-to-beam joint 11 .

In addition, in Figures 1, 4, and 5, we explained an example in which the PCa beam members are joined from two directions at the PCa column-beam joints and fixed, but the PCa beam members are joined from four directions at the PCa column-to-beam joints. It can also be fixed.

According to the construction method of the beam-to-column joint structure and the beam-to-column joint structure of the present invention, the PCa beam members can be reliably joined and fixed to the PCa beam-to-column joints from two or four directions. By constructing the joint structure as precast members that can be produced in a factory, the on-site work required during building construction can be reduced, the on-site construction work can be reduced, and the construction period can be greatly shortened, greatly contributing to improved productivity. can.

10 Column-beam joint structure 11 PCa column-beam joint 11a Upper surface 12 First PCa beam member 12a Beam main reinforcement 12c Joint surface 13 Second PCa beam member 13a Beam main reinforcement 14 Beam main reinforcement 14a One end 14b Other ends 15, 16 Mechanical filling Joint 17 Sheath tube (horizontal hole)
18, 19 Sheath tube (insertion hole)
20 Injection pipe 21 Injection hole 21a Vertical groove 21b Bottom L Fixation length H Beam thickness

Claims (6)

A method of constructing a beam-to-column joint structure by joining one precast beam member and the other beam member to a precast beam-to-column joint,
A plurality of vertical grooves are formed in a horizontal hole through which the beam main reinforcement penetrates at the beam-to-column joint and a joint surface to be joined with the beam member,
In the two beam members, a mechanical filling joint is embedded in advance at a position at a predetermined distance from the beam member end, and an insertion hole extending from the beam member end to the mechanical filling joint and a joint surface to be joined with the column-to-beam joint. A plurality of vertical grooves are formed in the
The vertical groove in the joint surface has a bottom in the vertical direction,
When installing the one beam member to the beam-to-column joint, the beam main reinforcement is inserted into the insertion hole of the one beam member through the horizontal hole of the beam-to-column joint on the opposite side of the beam member. placing a tip portion within the mechanical fill joint;
Next, install the other beam member so that the beam main reinforcement protruding from the column-to-beam joint on the opposite side of the one beam member is inserted into the insertion hole of the other beam member, disposing the tip portion of the beam main reinforcement protruding from the beam-to-column joint in the mechanical filling joint of the other beam member;
Next, the mechanical filling joint is filled with a filling material, the beam main reinforcement and the beam main reinforcement on the beam member side are joined in the mechanical filling joint, and the beam main reinforcement and the horizontal hole and the horizontal hole are joined together. Filling the gap between the inside of the insertion hole with a filler, fixing the beam main reinforcement in the horizontal hole and in the insertion hole,
A construction method for a column-to-beam joint structure in which a filler is filled in the vertical groove after the beam main reinforcement is joined to ensure adhesion at the joint surface. 2. The construction method for a column-to-beam joint structure according to claim 1, wherein the distance from the end of the beam member to the horizontal center position of the mechanical filling joint is equal to or greater than the beam height of the beam member. An injection pipe for the filler is previously embedded in at least one of the beam-to-column joint or the two beam members so as to communicate with the horizontal hole or the insertion hole, and the filler is injected from the injection pipe into the mechanical type. 3. The construction method for a column-to-beam connection structure according to claim 1 or 2, wherein filling joints, said horizontal holes and said insertion holes are filled. The beam-to-column joint according to any one of claims 1 to 3 , wherein the lateral hole and the insertion hole are formed by a sheath tube pre-embedded in the beam-column joint and a sheath tube pre-embedded in the beam member. Construction method of structure. A column-to-beam joint structure in which one precast beam member and the other beam member are joined to a precast column-to-beam joint,
The column-to-beam joint has a horizontal hole through which the beam main reinforcement passes,
The two beam members have a mechanical filling joint embedded at a predetermined distance from an end of the beam member, and an insertion hole extending from the end of the beam member to the mechanical filling joint,
A beam main reinforcement passes through the horizontal hole of the beam-to-column joint and the insertion hole of one of the beam members, the tip portion of which is located in the mechanical filling joint, and the beam main reinforcement protruding from the beam-to-column joint is penetrates the insertion hole of the other beam member and the tip portion thereof is located in the mechanical filling joint;
The beam main reinforcement and the beam main reinforcement on the beam member side are joined in the mechanical filling joint by the filler filled in the mechanical filling joint, and the beam main reinforcement and the horizontal hole and the insertion hole are connected. The beam main reinforcement is fixed in the horizontal hole and the insertion hole by a filler filled in the gap between
Each joint surface between the beam member and the column-to-beam joint is provided with a plurality of vertical grooves formed in advance and having bottomed bottom ends in the vertical direction. Column-to-beam joint structure in which is secured. 6. The column-to-beam joint structure according to claim 5 , wherein the distance from the end of the beam member to the horizontal center position of the mechanical filling joint is equal to or greater than the beam height of the beam member.

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