JP2973812B2 - Joint structure between steel members and concrete members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a steel member and a concrete member.

[0002]

2. Description of the Related Art A frame made of reinforced concrete columns and steel beams is lighter than a reinforced concrete frame, and has a larger span because the strength of the columns is greater than that of a steel frame. On the other hand, columns and beams have the advantage of being economical cross sections, etc.
Although it is often used as a method of constructing a frame, the joining portion is a joint between members having different structures, so that the fitting becomes a problem.

[0003] Generally, either a steel beam or a concrete column is penetrated through the joint, but when the beam penetrates, the workability of reinforcing the joint and the filling property of concrete are reduced, Also, simply penetrating a steel beam lacks clarity in the mechanism of stress transmission from the beam to the column. In the case where the column penetrates the beam, a specially shaped metal fitting is required for transmitting stress from the beam to the column, resulting in an increase in cost.

The present invention has been made in view of the actual situation of a joint comprising a concrete member and a steel frame member, and proposes a joint structure which can solve the above-mentioned problem and can be applied to other parts.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an end plate integral with an end of a steel frame member and abutting against a surface of a concrete member is disposed in the concrete of the concrete member, and at least one end is formed of an end portion. In addition to the threaded bar that penetrates the plate and protrudes from the end plate, the steel member and the concrete member are joined by using fixing hardware connected to both ends of the threaded bar, so that the fitting of the joint is simplified and arranged. Clarify the stress transmission mechanism while ensuring muscle workability and concrete filling.

[0006] The fixing hardware is composed of a female screw portion to which the end of the screw rebar is screwed and a flange projecting to the outer periphery thereof. The end of the screw rebar penetrates the end plate and protrudes from the end plate, thereby forming a concrete member. In the part located on the front side,
The female screw part fixes the end of the screw rebar to the end plate as a nut. In a portion where the end of the threaded reinforcement is buried in the concrete of the concrete member together with the intermediate part of the threaded reinforcement, the flange part anchors the end of the threaded reinforcement in the concrete as an anchor.

[0007] At the column / beam joint where a pair of steel members are arranged with a concrete member interposed therebetween, the steel members are integrated with the female screw portion of the fixing hardware as a nut to fix the screw rebar to the end plate. The end plate thus formed is abutted against the concrete member, and both ends of the screw reinforcing bar are fixed to the end plate by the fixing hardware, thereby being joined to the concrete member.

[0008] Further, the female screw portion of the fixing hardware fixes the screw reinforcing bar to the end plate as a nut, and the flange portion fixes the screw reinforcing bar in the concrete as an anchor, so that one steel member faces the concrete member. In the part to be arranged as the steel member, the end plate integrated with the steel plate is abutted against the concrete member, one end of a screw reinforcing bar projecting from the end plate is fixed to the end plate by a fixing metal, and the screw is screwed. The other end of the reinforcing bar is fixed to the concrete by the fixing hardware and is joined to the concrete member.

In the fixing hardware, at the portion where the end portion of the screw reinforcing bar projects from the end plate, the female screw portion tightens the screw reinforcing bar as a nut, thereby introducing tension to the screw reinforcing bar through the end plate to the concrete member. Pressure. At the portion where the end of the threaded bar is buried in the concrete member, the tensile force of the threaded bar is transmitted to the concrete by the supporting force acting on the flange. In each case, the anchoring hardware clarifies the mechanism for transmitting the stress from the steel member to the concrete member.

When both fixing hardware are located on the surface side of the concrete member, the tensile force from the steel frame member is determined by the adhesive force between the screw rebar and the concrete, and the flange portion of the fixing metal member located on the side opposite to the concrete member. Through the end plate to the concrete, and the compressive force is transmitted to the concrete by the end plate.

At the joint of the concrete member and the steel frame member, the threaded rebar is only arranged in the concrete member, so that the fitting of the joint can be simplified. Nature is secured.

[0012] The joint between the steel frame member and the concrete member can be achieved only by fastening both ends of the screw reinforcing bar to the end plate by means of a fixing metal, or by connecting the fixing metal to one end of the screw reinforcing steel, and connecting the fixing metal to the concrete. With the inside fixed, the other end is simply fastened to the end plate by the fixing metal, thereby completing the structure of the joint.

[0013] In addition, the fixing hardware corresponds to the portion where the end of the screw reinforcing bar is located on the surface side of the concrete member and the portion embedded in the concrete member. The present invention is applied to a portion where one steel frame member is arranged to face a concrete member, in addition to a column / beam joint portion arranged with a concrete member interposed therebetween.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a steel member 1 and a concrete member 2.
Is integrated with the end of the steel member 1 and the concrete member 2
An end plate 3 abutting against the surface of the end plate 3 and disposed in the concrete 20 of the concrete member 2 and at least one end penetrating the end plate 3
The end plate 3 is abutted and joined to the concrete member 2 using a screw reinforcing bar 4 protruding from the fixing member 5 and fixing hardware 5 connected to both ends of the screw reinforcing bar 4. The concrete member 2 may be cast-in-place concrete or precast concrete.

As shown in FIGS. 3 to 6, the fixing hardware 5 comprises a female screw portion 51 to which the screw reinforcing bar 4 is screwed, and a flange portion 52 extending outward from one end thereof. A filling hole 53 for filling a filler 6 such as mortar for integrating the screw reinforcing bar 4 with the fixing hardware 5 penetrates.

As shown in FIGS. 3 to 5, the fixing hardware 5 has a female threaded portion 51 which penetrates in the axial direction, and a closed type in which the female thread is cut from one end to the middle as shown in FIGS. , Depending on the part to be used.

The steel frame member 1 has its end plate 3 abutted against the concrete member 2 and both ends of the screw reinforcing bar 4 are fixed to the end plates 3, 3 by fixing hardware 5, 5, or one end is formed as an end portion. It is fixed to the plate 3 and the other end is fixed in the concrete 20 to be joined to the concrete member 2.

FIGS. 1 and 2 show a concrete member 2 as a pillar.
A joint portion is shown when the steel member 1 is a beam, or when the concrete member 2 is a wall and the steel member 1 is a small beam. When the screw reinforcing bar 4 penetrates the concrete member 2 as shown in FIG. 1, fixing hardware 5, 5 shown in FIG. 4 are used at both ends of the screw reinforcing bar 4 projecting from the end plates 3, 3. In this case, the steel member 1 is joined to the concrete member 2 by tightening the fixing hardware 5.

FIG. 1 corresponds to a joint where the pillar is a middle pillar, but when the threaded reinforcing bar 4 does not penetrate the concrete member 2 as shown in FIG.
The fixing metal 5 shown in FIG.
The fixing metal 5 shown in FIG. 7 is used at the end of the screw reinforcing bar 4 located in the concrete 20. The closed fixing metal 5 is fixed to the concrete 20 by being embedded in the concrete member 2 in a state of being integrated with the screw reinforcing bar 4 by the filler 6.

FIG. 3 shows a mounting state of the through-type fixing hardware 5 located on the end plate 3 side. The penetrating fixing metal 5 is tightened to introduce tension into the screw reinforcing bar 4, fix its end to the end plate 3, and fill the filling material 6 from the filling hole 53 to the screw reinforcing bar 4. Integrate.

FIG. 9 shows an embodiment in which the steel member 1 is a pillar and the concrete member 2 is a foundation. In this case, the end plate 3 serves as a base plate for the concrete member 2.
2, the steel frame member 1 is fixed to the concrete member 2 by through-type and closed-type fixing hardware 5, 5 as in the embodiment of FIG.

FIG. 10 shows an embodiment in which the steel member 1 is a heavy equipment and the concrete member 2 is a foundation. FIG. 11 shows an embodiment in which the steel member 1 is a bridge and the concrete member 2 is a pier. Show. Also in these cases, the steel member 1 is joined to the concrete member 2 as in FIG.

[0023]

An end plate integral with the end of the steel member and abutting against the surface of the concrete member, and disposed in the concrete of the concrete member, at least one end penetrating the end plate and the end portion. In order to join steel members and concrete members by using fixing hardware consisting of female threads that are connected to both ends of the screw rebar and that are screwed with the screw rebar and flanges that protrude on the outer circumference, in addition to the screw rebar that protrudes from the plate At the joint of the concrete member and the steel member, the screw rebar is only disposed in the concrete member, and the fitting of the joint is simple, and the work of arranging the reinforcement and the filling property of the concrete are improved.

Since the fixing hardware has a female screw portion and a flange portion, in a portion where the end portion of the screw reinforcing bar projects from the end plate, the female screw portion serves as a nut to fix the end portion of the screw reinforcing bar to the end plate. At the part where the end of the reinforcing bar is buried in the concrete of the concrete member, the flange is used as an anchor to fix the end of the threaded reinforcing bar in the concrete. In addition to the beam joint, the steel frame member can be joined to the concrete member at a portion where one steel frame member is arranged to face the concrete member.

Since the stress between the steel member and the concrete member is transmitted by the adhesive force of the screw rebar or the bearing pressure of the fixing hardware, the stress transmission mechanism is clear.

Since the joining of the steel frame member and the concrete member is completed only by fastening both ends of the screw reinforcing bar to the end plate, or by tightening one fixing metal in the concrete while fixing the other fixing metal, The structure of the joint is simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a joint between a column and a beam.

FIG. 2 is a longitudinal sectional view showing another column / beam joint.

FIG. 3 is a detailed view of a fixing metal part of FIG. 1;

FIG. 4 is a side view showing a through-type fixing hardware.

FIG. 5 is a sectional view of FIG. 4;

FIG. 6 is a sectional view orthogonal to the axis of FIG. 4;

FIG. 7 is a side view showing a closed type fixing hardware.

FIG. 8 is a sectional view of FIG. 7;

FIG. 9 is a longitudinal sectional view showing a joint between a column base and a foundation.

FIG. 10 is a longitudinal sectional view showing a joint between the weight device and the foundation.

FIG. 11 is an elevation view showing a joint between a bridge and a pier.

[Explanation of symbols]

1 ... steel member, 2 ... concrete member, 20 ... concrete, 3 ... end plate, 4 ... screw rebar, 5 ...
… Fixing hardware, 51… Female thread, 52… Flange, 53…
... filling holes, 6 ... filling materials.

Claims (1)

(57) [Claims] 1. An end plate for integrating a steel member and a concrete member to an end of the steel member, and an end plate abutting against a surface of the concrete member; and an end plate disposed in the concrete of the concrete member, wherein at least one end is an end. It is a joint structure where the end plate is joined to the concrete member by using a screw reinforcing bar that penetrates the plate and protrudes from the end plate, and a female screw portion whose end is screwed to both ends of the screw reinforcing bar. A joint structure between a steel member and a concrete member to which a fixing metal having a flange projecting to an outer periphery of a female screw portion is connected, and at least one fixing metal fixes an end of a screw reinforcing bar to an end plate.