JP6807473B1 - Construction method of joint structure and joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing a joint structure, a joint structure and the like, which can suitably reinforce a shear force in a joint structure of a precast member and a structure made of cast-in-place concrete, and can easily manufacture the precast member. SOLUTION: A part having holes 21 of a perforated steel plate gibber 2 by placing concrete in the form 5 with a perforated steel plate gibber 2 inserted in a slit 51 formed in the form 5. Is embedded in concrete, and a pillar member 1 in which the other portion of the perforated steel plate gibber 2 having a hole 21 protrudes from the concrete is manufactured. By transporting the column member 1 to the construction site, installing it at a predetermined location, and placing cast-in-place concrete, the other part of the perforated steel plate gibber 2 is embedded in the beam member made of cast-in-place concrete. Build a joint structure between 1 and the beam member. [Selection diagram] Fig. 2

Description

The present invention relates to a method for constructing a joint structure and a joint structure.

When joining a beam made of cast-in-place concrete to the side of a concrete precast column, the joint surface of both members may be provided with irregularities called cotters or sharkies to transmit the shearing force in the vertical direction. Patent Document 1 describes an example of a cotter that transmits a shearing force in the vertical direction.

In addition, when joining a slab made of cast-in-place concrete to the upper part of a concrete precast beam, the horizontal reinforcing bars of the precast beam are embedded in the slab, and the vertical cutting bars are embedded in both members during an earthquake. In some cases, both members are prevented from slipping by resisting a horizontal shearing force such as.

Japanese Patent No. 5236152

In order to provide a cotter on the joint surface between the precast column and the beam made of cast-in-place concrete, it is necessary to perform uneven processing for forming the cotter on the formwork when the precast column is manufactured, which is troublesome and costly. In addition, the cotter has a low shear transfer capacity, and the shear force may not be transmitted as expected.

Further, the lateral reinforcing bar of the precast beam originally resists the shearing force in the vertical direction generated at the time of an earthquake or the like, and when the lateral reinforcing bar resists the shearing force in the horizontal direction and the vertical direction at the same time, There is a risk that the lateral reinforcement will not be able to fully exert the shear resistance force in the vertical direction that it should originally exert. On the other hand, the cutting bar needs to be installed in a forest of lateral reinforcing bars and the like at the time of manufacturing the precast beam, which is troublesome and costly.

Further, as a common problem when the lateral reinforcing bars and the cutting bars resist the shearing force in the horizontal direction, these reinforcing bars have low rigidity in the horizontal direction. Therefore, in the initial stage where shearing in the horizontal direction occurs, the reinforcing bar S is easily bent and deformed as shown by the arrow in FIG. 5, and then the reinforcing bar S resists the shearing due to the axial force (tensile stress). As a result, the shear resistance force due to the reinforcing bar S cannot be expected until after shearing occurs and a certain amount of deviation occurs between the precast beam and the slab.

The present invention has been made in view of the above problems, and in a joint structure between a precast member and a structure made of cast-in-place concrete, reinforcement against shear force can be suitably performed, and the precast member can be easily manufactured. It is an object of the present invention to provide a structure construction method, a joint structure, and the like.

In the first invention for solving the above-mentioned problems, the perforated steel plate gibber is formed by placing concrete in the mold in a state where the perforated steel plate gibber is inserted into the slit formed in the mold. A step of manufacturing a precast member in which a part having a hole of the above is embedded in concrete and another part having a hole of the perforated steel plate gibber protrudes from the concrete, and a predetermined location by transporting the precast member to a construction site. By placing cast-in-place concrete at the site, a joint structure between the precast member and the structure is constructed in which the other portion of the perforated steel plate gibber is embedded in the structure made of the cast-in-place concrete. The precast is at a position where a part having a hole of the perforated steel plate gibber does not interfere with the main bar of the precast member and the reinforcing bar arranged so as to surround the main bar and forming an annular shape. Embedded in the concrete of the member, the precast member is a pillar member, the structure is a beam member, and a part of the perforated steel plate gibber having holes is contained in the concrete cover portion of the precast member. a method for constructing a joint structure to be embedded in said Rukoto to.

According to the present invention, in a joint structure of a precast member and a structure made of cast-in-place concrete, reinforcement against shear force can be suitably performed by using a perforated steel plate gibber having high in-plane rigidity and durability. Moreover, when manufacturing the precast member, it is only necessary to insert the perforated steel plate gibber into the slit formed in the formwork, and it is not necessary to process the unevenness of the formwork. Moreover, the perforated steel plate gibber can be made thin and compact to reinforce the precast member. Since it does not easily interfere with streaks, it is easier to manufacture precast members than before.

Further, by forming the precast member and the above structure into a column member and a beam member, and a beam member and a beam member, respectively, it is possible to suitably reinforce the shearing force in a frame in which these are combined. Since the perforated steel plate gibber can set an arbitrary yield strength by adjusting the diameter and pitch of the holes, the number of steel plates, etc., a high degree of freedom in designing these frames can be realized.

The second invention is a joint structure of a precast member and a structure made of cast-in-place concrete, wherein the precast member is a pillar member, the structure is a beam member, and the precast member has a perforated steel plate gibber. A part having a hole of the above is embedded, and another part having a hole of the perforated steel plate gibber protruding from the precast member is embedded in the structure, and a part having a hole of the perforated steel plate gibber is embedded in the structure. A part of the precast member, which is embedded in the concrete of the precast member and has holes of the perforated steel plate gibber, at a position where it does not interfere with the main bar of the precast member and the reinforcing bars arranged so as to surround the main bar and forming an annular shape . It is a joint structure characterized in that it is embedded so as to fit within the concrete cover portion of the precast member .

INDUSTRIAL APPLICABILITY The present invention provides a method for constructing a joint structure, a joint structure, and the like, which can suitably reinforce the shearing force in a joint structure of a precast member and a structure made of cast-in-place concrete, and can easily manufacture the precast member. be able to.

The figure which shows the joint structure 10 and its construction method. The figure which shows the manufacturing process of a pillar member 1. The figure which shows the joint structure 10a and its construction method. The figure which shows the joint structure 10b and the construction method thereof. The figure which shows the behavior of the reinforcing bar S at the time of shear occurrence.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
(1. Joining structure 10)
FIG. 1A is a diagram showing a joining structure 10 according to the first embodiment of the present invention. The joining structure 10 joins a column member 1 which is a precast concrete member and a beam member 3 which is a structure made of cast-in-place concrete.

The column member 1 and the beam member 3 are members provided in the vertical direction and the horizontal direction, respectively. In the joint structure 10, the side surface of the column member 1 (the surface along the member axial direction of the column member 1) and the end surface of the beam member 3 (the surface orthogonal to the member axial direction of the beam member 3) are joined, and the joint surface is joined. A perforated steel plate gibber 2 is installed in C.

The perforated steel plate gibber 2 is arranged so that its plate surface faces a vertical surface along the direction from the column member 1 to the beam member 3, and a part having the holes 21 is embedded in the concrete of the column member 1 to form holes. The other portion having 21 protrudes from the concrete of the column member 1 and is embedded in the concrete of the beam member 3.

Inside the column member 1, a column main bar 15, a hoop bar 17, and the like are embedded.

The column main bar 15 is a reinforcing bar arranged along the vertical direction, and is arranged at four corners or the like on the plane of the column member 1. The hoop bars 17 are annular reinforcing bars arranged so as to surround the column main bars 15 in a plane, and are arranged in a plurality of stages at intervals in the vertical direction.

Inside the beam member 3, a beam main bar 35, a stirrup bar 37, and the like are embedded.

The beam main bar 35 is a reinforcing bar arranged along the horizontal direction, and is arranged in two upper and lower stages in the present embodiment. The end of each beam main bar 35 on the column member 1 side protrudes from the joint surface C of the beam member 3 and is embedded in the column member 1. A fixing body 351 having a width wider than the diameter of the reinforcing bar of the beam main bar 35 is also provided at this end.

The stirrup bars 37 are annular reinforcing bars arranged so as to surround the beam main bars 35 in the vertical plane, and are arranged in a plurality of rows at intervals in the horizontal direction.

The perforated steel plate gibber 2 is a reinforcing material that integrates the column member 1 and the beam member 3 by the shear resistance of the concrete filled in the holes 21 of the steel plate, whereby the shearing force in the vertical direction between the two members is exerted. Transmission can be preferably performed. Further, since the perforated steel plate gibber 2 has high in-plane rigidity, it is not deformed by a shearing force in the vertical direction, and is effective from the initial stage of shearing.

On the column member 1 side, the perforated steel plate gibber 2 is embedded so as to fit within the concrete covering portion of the column member 1. As a result, the perforated steel plate gibber 2 does not interfere with the column main bar 15 and the hoop bar 17 of the column member 1, and the degree of freedom in the arrangement of the column member 1 and the installation location of the perforated steel plate gibber 2 is improved.

However, when the distance between the hoop bars 17 can be widened, the perforated steel plate gibber 2 may be inserted between the hoop bars 17 to a position deeper than the concrete covering portion of the column member 1 and arranged. By increasing the area of the perforated steel plate gibber 2 embedded in the column member 1 in this way, the diameter of the holes 21 can be increased and the shear force transmission performance can be improved.

On the other hand, on the beam member 3 side, the perforated steel plate gibber 2 is embedded in the concrete within the range (core) surrounded by the stirrup bars 37, and does not interfere with the beam main bars 35 and the stirrup bars 37 of the beam member 3. It is considered to be an arrangement.

Although not shown, another pillar member can be arranged on the upper stage of the pillar member 1. The upper end of the column main bar 15 projects from the upper surface of the column member 1, and when another column member is arranged, the upper end of the column main bar 15 is provided on the lower surface of the other column member (reference numeral 19 in FIG. 2 to be described later). By inserting it into (see), the upper and lower column members are connected.

(2. Construction method of joint structure 10)
When constructing the joint structure 10 shown in FIG. 1A, in the present embodiment, the pillar member 1 is manufactured as a precast member by first placing concrete in the formwork at a factory or the like.

FIG. 2 is a diagram showing a manufacturing process of the pillar member 1. FIG. 2A shows a cross section of the above-mentioned formwork 5 in the vertical direction, and FIG. 2B is a view of the formwork 5 viewed from the direction of arrow a in FIG. 2A. Further, FIG. 2C is a diagram showing a pillar member 1 manufactured as a precast member.

The formwork 5 is, for example, a steel formwork, and is arranged upright in a square cylinder in the manufacturing yard of the pillar member 1. However, the formwork 5 is not limited to the steel formwork. Further, the arrangement of the formwork 5 is not limited to the above, and the formwork 5 may be laid down.

In the formwork 5, in addition to the column main bar 15 and the hoop bar 17, other buried objects necessary for the column member 1 such as the coupler 19 described above are also arranged. The coupler 19 is arranged at the bottom of the formwork 5, and the lower end of the column main bar 15 is inserted into the upper part of the coupler 19. Here, the end portion of the beam main bar 35 is also arranged in the formwork 5. The beam main bar 35 projects outward from the hole 52 of the formwork 5.

Further, in the present embodiment, a slit 51 is formed on one side surface of the mold 5, and a perforated steel plate gibber 2 is inserted into the slit 51. A part of the perforated steel plate gibber 2 having the holes 21 is arranged inside the formwork 5, and another part having the holes 21 is arranged outside the formwork 5.

The pillar member 1 shown in FIG. 2C is manufactured by placing concrete in the formwork 5 with the perforated steel plate gibber 2 arranged as described above. A part of the perforated steel plate gibber 2 having a hole 21 is embedded in the concrete of the column member 1, and the other part having the hole 21 protrudes from the side surface of the column member 1.

As shown in FIG. 2 (c), in the present embodiment, a plurality of (three in the example of the figure) perforated steel plate shears 2 are arranged side by side, but the number and arrangement thereof are determined by the bar arrangement situation and the arrangement. It can be arbitrarily set according to the expected shear strength, and is not particularly limited. For example, it is possible to use only one perforated steel plate gibber 2 or to install a plurality of perforated steel plate gibber 2 in the vertical direction. The above-mentioned "horizontal" means a direction orthogonal to the member axial direction of the beam member 3 in a plane.

The pillar member 1 manufactured in this way is transported to the construction site and installed at a predetermined location as shown in FIG. 1 (b). After that, the stirrup bar 37 and the remaining beam main bars of the beam member 3 are assembled. The beam main bar is connected to the tip of the beam main bar 35 protruding from the column member 1 by using a coupler (not shown) or the like. After that, a formwork (not shown) is installed and concrete is placed on the beam member 3 as shown by the chain line in FIG. 1 (c). As a result, the beam member 3 shown in FIG. 1A is formed, and the joint structure 10 between the column member 1 and the beam member 3 is constructed.

In the first embodiment described above, in the joint structure 10 of the column member 1 and the beam member 3, the perforated steel plate gibber 2 having high in-plane rigidity and durability is suitably used to reinforce the shearing force. Can be done. Since the perforated steel plate gibber 2 can be set to an arbitrary yield strength by adjusting the diameter and pitch of the holes 21, the number of steel plates, and the like, a high degree of freedom in designing the frame composed of the column member 1 and the beam member 3 can be realized.

Moreover, at the time of manufacturing the pillar member 1, it is sufficient to insert the perforated steel plate gibber 2 into the slit 51 formed in the formwork 5, and it is not necessary to perform uneven processing of the formwork 5, and the perforated steel plate gibber 2 is thin and small. Since it is unlikely to interfere with the column main bar 15 and the hoop bar 17 of the column member 1, the column member 1 can be manufactured more easily than before.

Further, when a cotter is formed on the column member 1 as in the conventional case instead of the perforated steel plate gibber 2, a convex portion is often added to the inside of the form 5 from the viewpoint of simplicity of form processing. In this case, the column member 1 will have a concave cross-sectional defect. After the joint structure is formed as described above, the defect portion is filled with cast-in-place concrete of the beam member 3, but the concrete strength of the beam may be lower than that of the column. The structural performance of the column member 1 may be lower than the required strength. On the other hand, when the perforated steel plate gibber 2 is used as in the present embodiment, there is an advantage that the above-mentioned fear does not occur because the cross-sectional defect of the column member 1 does not occur.

In the first embodiment, the portion A having a height corresponding to the joint surface C of the column member 1 and the other portions are integrally manufactured, but these portions are manufactured as separate bodies, and these parts are manufactured at the site. The parts may be combined. Further, an annular reinforcing bar similar to the stirrup bar 37 is provided in the column member 1 so as to surround the perforated steel plate gibber 2, whereby the shear resistance of the perforated steel plate gibber 2 can be improved.

Hereinafter, another example of the present invention will be described as a second and third embodiment. The second and third embodiments will be described with reference to differences from the first embodiment, and the same configurations will be omitted by adding the same reference numerals in figures and the like. In addition, the configurations described in each embodiment, including the first embodiment, can be combined as needed.

[Second Embodiment]
(1. Joining structure 10a)
FIG. 3A is a diagram showing a joint structure 10a according to a second embodiment of the present invention. The joint structure 10a joins the beam member 3a, which is a precast concrete member, and the beam member 3b, which is a structure made of cast-in-place concrete.

As shown in FIG. 3A, in the present embodiment, a pair of beam members 3a are arranged at intervals so that their end faces face each other, and a beam member 3b made of cast-in-place concrete is provided between them. In the joint structure 10a, the end face of the beam member 3a and the end face of the beam member 3b are joined, and the perforated steel plate gibber 2 is installed on the joint surface C.

The perforated steel plate gibber 2 is arranged so that its plate surface faces a vertical surface along the direction from the beam member 3a to the beam member 3b, and a part having the holes 21 is embedded in the concrete of the beam member 3a to form holes. The other portion having 21 protrudes from the concrete of the beam member 3a and is embedded in the concrete of the beam member 3b.

Similar to the beam member 3, the beam main bar 35, the stirrup bar 37, and the like are embedded in the beam member 3a. The end of the beam main bar 35 protrudes from the joint surface C of the beam member 3a and is embedded in the beam member 3b.

The ends of the beam main bars 35 protruding from each beam member 3a are connected by a coupler 39 embedded in the beam member 3b. Also in the beam member 3b, an annular stirrup bar 37 is embedded so as to surround the beam main bar 35 protruding from the beam member 3a in a vertical plane, and the stirrup bars 37 are arranged in a plurality of rows at intervals in the horizontal direction.

The perforated steel plate gibber 2 integrates the beam members 3a and 3b by the shear resistance of the concrete filled in the holes 21 of the steel plate, whereby the shearing force in the vertical direction can be suitably transmitted between the two members. it can.

The perforated steel plate gibber 2 is embedded in concrete within the range (core) surrounded by the stirrup bar 37 on both the beam member 3a side and the beam member 3b side, and interferes with the beam main bar 35, the stirrup bar 37, and the like. It is not arranged. Similar to the first embodiment, the number and arrangement of the perforated steel plate gibber 2 can be arbitrarily set according to the bar arrangement situation and the expected shear strength, and are not particularly limited.

(2. Construction method of joint structure 10a)
When constructing the joint structure 10a, first, in the same manner as described above, the beam member 3a is manufactured as a precast member by placing concrete in the formwork at a factory or the like. For example, a steel formwork is used for the formwork, and a slit for inserting the perforated steel plate gibber 2 is formed in a portion of the formwork that corresponds to the end surface of the beam member 3a, as described above.

By arranging the necessary reinforcements such as the beam main reinforcement 35 and the stirrup reinforcement 37 in the formwork and placing concrete in the formwork with the perforated steel plate gibber 2 inserted in the slit, FIG. A beam member 3a showing an end portion in b) is manufactured. A part of the perforated steel plate gibber 2 having a hole 21 is embedded in the concrete of the beam member 3a, and the other part having the hole 21 protrudes from the end face of the beam member 3a.

After the two beam members 3a are manufactured in this way, these beam members 3a are transported to the construction site, and as shown in FIG. 3C, the end faces are opposed to each other and installed at a predetermined position. Then, the ends of the beam main bars 35 protruding from each beam member 3a are connected to each other by a coupler 39 between the beam members 3a. Further, between the two beam members 3a, a stirrup bar 37 is arranged so as to surround the beam main bar 35 protruding from each beam member 3a in a vertical plane.

After that, a formwork (not shown) is installed between both beam members 3a, and concrete is placed on the beam member 3b as shown by a chain line to form the beam member 3b shown in FIG. 3A. , A joint structure 10a of the beam member 3a and the beam member 3b is constructed.

Also in the second embodiment, the joint structure 10a of the beam member 3a which is a precast member and the beam member 3b which is a structure made of cast-in-place concrete is formed, and a part of the perforated steel plate gibber 2 having a hole 21 is formed in the beam member 3a. By burying the other portion having the hole 21 in the beam member 3b for construction, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
(1. Joining structure 10b)
FIG. 4A is a diagram showing a joint structure 10b according to a third embodiment of the present invention. The joint structure 10b joins the beam member 3c, which is a precast concrete member, and the slab member 9, which is a structure made of cast-in-place concrete.

The left figure of FIG. 4A is a side view of the beam member 3c and the slab member 9, and the right figure is a cross section at the position of the perforated steel plate gibber 2 in the left figure (cross section orthogonal to the member axial direction). ) Is shown. The above is the same in FIGS. 4 (b) and 4 (c) described later.

The slab member 9 is a plate-shaped member provided along the horizontal plane, and is arranged on the beam member 3c as shown in FIG. 4A. The range B in which the beam member 3c and the portion of the slab member 9 corresponding to the upper portion of the beam member 3c are combined may be referred to as a beam as a whole, and the beam member 3c is a precast member forming a part of the beam. In that sense, it is sometimes called a half precast member.

In the joint structure 10b, the upper surface of the beam member 3c (the surface of the beam member 3c along the member axial direction) and the lower surface of the slab member 9 are joined, and the perforated steel plate gibber 2 is installed on the joint surface C.

The perforated steel plate gibber 2 is arranged so that its plate surface faces a vertical surface along the member axial direction of the beam member 3c, and a part having the holes 21 is embedded in the concrete of the beam member 3c and has the holes 21. The other portion protrudes from the concrete of the beam member 3c and is embedded in the concrete of the slab member 9.

Inside the beam member 3c, the same beam main bar 35, stirrup bar 37, etc. as in the beam member 3 are embedded. However, the beam main bar 35, the stirrup bar 37, etc. are arranged when the above range B is used as a beam, and in the example of the figure, the lower beam main bar 35 of the upper and lower beam main bars 35 is embedded in the beam member 3c. The upper beam main bar 35 is embedded in the concrete of the slab member 9. Further, the upper portion of the stirrup bar 37 protrudes from the upper surface of the beam member 3c and is embedded in the concrete of the slab member 9.

The perforated steel plate gibber 2 integrates the beam member 3c and the slab member 9 by the shear resistance of the concrete filled in the holes 21 of the steel plate, thereby preferably preventing the two members from slipping against the shearing force in the horizontal direction. Can be done. The perforated steel plate gibber 2 is embedded in concrete within the range (core) surrounded by the stirrup bar 37, and is arranged so as not to interfere with the beam main bar 35, the stirrup bar 37, and the like.

In the present embodiment, as shown in the right figure of FIG. 4A, a plurality of (three in the example of the figure) perforated steel plate gibber 2 are arranged side by side on the joint surface C. However, the number and arrangement of the perforated steel plate gibber 2 can be arbitrarily set according to the bar arrangement condition and the expected shear strength, and are not particularly limited. Further, the distance L from the side surface of the perforated steel plate gibber 2 arranged on the outermost side to the side surface of the beam member 3c is also an appropriate value (for example, the hole 21) so that the shear resistance force of the perforated steel plate gibber 2 can be suitably exhibited. It can be set to about 3 to 4 times the diameter of.

Further, in the present embodiment, the plurality of perforated steel plate gibber 2 is set as one set, and the plurality of sets of perforated steel plate gibber 2 are spaced apart in the member axial direction of the beam member 3c as shown in the left figure of FIG. 4A. Is placed with a space. The interval is not particularly limited. Further, the position of the perforated steel plate gibber 2 in the member axial direction of the beam member 3c is ideally located at the center of the span where a deviation between the beam member 3c and the slab member 9 is likely to occur, but the position is not limited to this. The number of sets of perforated steel plate gibber 2 to be arranged can be freely determined according to the expected shear strength and the like.

(2. Construction method of joint structure 10b)
When constructing the joint structure 10b, first, in the same manner as described above, the beam member 3c is manufactured as a precast member by placing concrete in the formwork at a factory or the like. For example, a steel formwork is used for the formwork, the upper part of the formwork corresponding to the upper surface of the beam member 3c is opened, and a setup bar for installing the perforated steel plate gibber 2 at a predetermined position is opened in this part (not shown). Is provided. The perforated steel plate gibber 2 can be easily installed by using this setup bar, but the setup bar is an example of the installation mechanism of the perforated steel plate gibber 2, and is not limited to this.

The beam member 3c shown in FIG. 4B is manufactured by arranging necessary reinforcements inside and outside the formwork and placing concrete in the formwork. A part of the perforated steel plate gibber 2 having a hole 21 is embedded in the concrete of the beam member 3c, and the other part having the hole 21 protrudes from the beam member 3c.

After the beam member 3c is manufactured in this way, the beam member 3c is transported to the construction site and installed at a predetermined location. Then, the necessary reinforcement is arranged on the slab member 9, a formwork (not shown) is installed, and concrete of the slab member 9 is cast as shown by the chain line in FIG. 4 (c). As a result, the slab member 9 shown in FIG. 4A is formed, and the joint structure 10b of the beam member 3c and the slab member 9 is constructed.

Also in the third embodiment, the joint structure 10b of the beam member 3c which is a precast member and the slab member 9 which is a structure made of cast-in-place concrete is formed, and a part of the perforated steel plate gibber 2 having a hole 21 is formed in the beam member 3c. By burying the other portion having the hole 21 in the slab member 9 and constructing the slab member 9, the same effect as that of the first embodiment can be obtained.

In addition, a beam member made of cast-in-place concrete may be constructed following the end face of the beam member 3c. In this case, as shown in FIG. 4D, a perforated steel plate shear 2 is provided on the end face of the beam member 3c as in the second embodiment, and a portion of the perforated steel plate shear 2 protruding from the end face is formed at the site. By burying it in a beam member made of cast concrete, it is possible to reinforce the shear force of both beam members.

Although various embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the shapes of the column member 1, the beam members 3, 3a, 3b, 3c, the slab member 9, the bar arrangement state, and the like described in each embodiment are not limited to those described above, and can be variously determined.

Further, in each embodiment, the reinforcing bar may be inserted through a part or all the holes 21 of the perforated steel plate gibber 2. By inserting a reinforcing bar through the hole 21, a higher shear resistance can be exhibited.

Further, the specifications such as the shape, size, thickness, and number of holes 21 of the perforated steel plate gibber 2 are not particularly limited, and for example, the strength per hole 21 and the strength per hole 21 according to the standard specification of composite structure (JSCE). The spacing between the holes 21 and the like can be determined, and the specifications of the perforated steel plate gibber 2 can be determined based on these.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1: Pillar member 2: Perforated steel plate gibber 3, 3a, 3b, 3c: Beam member 5: Formwork 9: Slab member 10, 10a, 10b: Joint structure 15: Column main bar 35: Beam main bar 17: Hoop bar 19, 39: Coupler 21, 52: Hole 37: Stirrup muscle 51: Slit

Claims (2)

By placing concrete in the formwork with the perforated steel plate gibber inserted in the slit formed in the formwork, a part of the perforated steel plate gibber having holes is embedded in the concrete and the holes are formed. The process of manufacturing a precast member in which other parts having holes in the perforated steel plate gibber protrude from the concrete, and
By transporting the precast member to the construction site, installing it at a predetermined location, and placing cast-in-place concrete, the other part of the perforated steel plate gibber is embedded in the structure made of the cast-in-place concrete. The process of constructing a joint structure between a member and the structure,
Have,
A part of the perforated steel plate gibber having holes is embedded in the concrete of the precast member at a position where it does not interfere with the main bar of the precast member and the reinforcing bar which is arranged so as to surround the main bar and constitutes an annular shape .
The precast member is a column member, and the structure is a beam member.
Some, method for constructing a joint structure according to claim Rukoto embedded to fit within the concrete head portion of the precast member with a hole of the perforated steel dowel. It is a joint structure between a precast member and a structure made of cast-in-place concrete.
The precast member is a pillar member and
The structure is a beam member and
A part having a hole of a perforated steel plate gibber is embedded in the precast member.
In the structure, another portion having a hole of the perforated steel plate gibber protruding from the precast member is embedded.
A part of the hole of the perforated steel plate gibber is embedded in the concrete of the precast member at a position where it does not interfere with the main bar of the precast member and the reinforcing bar which is arranged so as to surround the main bar and constitutes an annular shape .
A joint structure characterized in that a part of the perforated steel plate gibber having holes is embedded so as to be fitted in a concrete covering portion of the precast member .

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