JPH07252884A - Construction method of frame with precast members - Google Patents

Abstract

(57) [Abstract] [Purpose] When constructing a frame structure using precast concrete column members and beam members, by connecting by crimping using PC steel, the main bars are connected and the post-cast concrete is poured. No need for installation. [Structure] A method of constructing a frame structure using a column member 1 and a beam member 2 made of precast concrete that are manufactured without protruding the main bars 11 and 21 from the end faces of the members. Butt each other, insert the PC steel material 3 into the insertion hole 13 opened in each pillar member 1, tightly connect the two pillar members 1 and 1, and join the beam member 2 to the side surface of the pillar member 1. The through hole 23 of the beam member 2 and the through hole 14 of the pillar member 1 continuous with the through hole 23 are provided between the adjacent pillar members 1 and 1.
A method of joining the beam member 2 to the column member 1 by inserting the PC steel material 4 into the and tightly connecting them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a frame structure using a precast pillar member and a beam member.

[0002]

2. Description of the Related Art A method of constructing a frame structure using a column member and a beam member made of precast concrete is a method in which a column member on the upper layer side is placed on a column member on the lower layer side and a space of a joint portion is formed. While connecting the reinforcing bars protruding from both end faces, the beam members are installed between the pillar members, and both reinforcing bars are connected in the same manner, or the reinforcing bars of the beam members are fixed to the joints and joined. Construction is done by installing a formwork around the parts and placing concrete, but at the joints between column members and between column members and beam members it is essential to connect and fix the reinforcing bars, Since the whole cannot be precast, the joints must rely on on-site work.

Further, in the method of constructing a frame from precast concrete members, the quality of concrete may be different because the frame is divided into a precast part and a cast-in-place part.

[0004] In addition, since the precast concrete member has a large weight when it is made of solid, there is a problem that the efficiency of transportation and construction is reduced. For example, a part of a beam member and a column member is cut out, Alternatively, it can be reduced by making it hollow, but usually it is necessary to integrate it with post-cast concrete.

The present invention has been made in view of the problem of the frame construction method using the precast member, and proposes a method for simplifying the on-site work of the joint.

[0006]

According to the present invention, a main member of a precast concrete column member and a beam member, which is reinforced in concrete, is housed in the concrete to connect the column members to each other and to join the column member and the beam member. The use of PC steel eliminates the protrusion of reinforcing bars from the members, eliminating the need for connecting and fixing the reinforcing bars at the joints and placing concrete.

The main bars of the column members and the beam members and the main bar restraint bars are both completely embedded in the concrete.

Insertion holes communicating from the side surface to the end surface are formed at both end positions of the pillar member, and insertion holes penetrating in the axial direction over the entire length are formed between the end surfaces of the beam member, and the middle of the pillar member is formed. An insertion hole which is continuous with the insertion hole of the beam member and which penetrates between the side surfaces is opened at the position where the portion is connected to the beam member.

To construct a frame, pillar members which are continuous in the vertical direction are butted against each other, a PC steel material is inserted into an insertion hole formed in each pillar member, and this is tightly joined to join both pillar members to form a beam member as a pillar. It is installed between the pillar members that are adjacent to the side surface of the member and is installed in the through hole of the beam member and the through hole of the pillar member continuous to this.
Insert the PC steel material and tighten it, join the beam member to the column member,
By joining the column members together and joining the beam members to the column members with the PC steel material, it is not necessary to connect or fix the main bars at the joint and to place concrete, On-site labor can be saved, and at the same time problems of concrete quality are solved.

Further, the problem of weight due to being made of precast concrete is solved by the fact that both the column member and the beam member satisfy the respective required proof strengths, while the central portion on the cross section perpendicular to the axis is formed hollow. The efficiency of transportation and construction can be improved. Even in this case, since the hollow cross section has a necessary yield strength, it is not necessary to integrate it with cast-in-place concrete, the effect of labor saving is maintained, and the problem of concrete quality does not occur.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment.

FIG. 1 shows a column member 1 and a beam member 2 made of precast concrete, which are manufactured by embedding main bars 11, 21 and main bar restraining bars 12, 22 in concrete as shown in FIG. This is a method of constructing a frame by joining using PC steel materials 3 and 4.

According to the present invention, the column members 1 and 1 are joined together and the column member 1 and the beam member 2 are joined together by the tensile force of the PC steel materials 3 and 4, so that the main bars 11 and 11 of the column members 1 and 1 are joined together. Since it is not necessary to connect the main bars 21 and 21 of the beam members 2 and 2 and to fix the main bars to the joint, the main bars 11 and 21 are completed in the column member 1 and the beam member 2 as shown in FIG. It is buried and there is no protrusion from the end face.

At both ends of the pillar member 1, there are formed through holes 13 through which the PC steel material 3 for joining the vertically continuous pillar members 1 and 1 to each other is inserted. Since the PC steel material 3 is inserted after the pillar member 1 on the upper layer side is installed, the insertion hole 13 communicates from the side surface to the end surface, and as shown in FIG. As shown in FIG. 4, it is evenly opened on the four corner positions on the plane where it does not interfere with the main muscle 11.

As shown in FIG. 5, an insertion hole 14 through which a PC steel material 4 for connecting the beam member 2 to the column member 1 is inserted is opened at a position where the beam member 2 is connected to an intermediate portion of the column member 1. . The insertion hole 14 is continuous with an insertion hole 23 of the beam member 2 which will be described later, and penetrates between the opposing side surfaces of the column member 1 to be opened. Pillar member 1
In each of the insertion holes 13 and 14, of the sheath 5 for PC steel materials 3 and 4,
6 are arranged respectively.

Between both end faces of the beam member 2 over the entire length, as shown in FIG.
As shown in FIG. 5, an insertion hole 23 penetrating in the axial direction is opened symmetrically with respect to a vertical plane passing through the centroid on the cross section, and the sheath 7 is arranged therein.

As shown in FIG. 1, the upper and lower pillar members 1, 1 are filled with a grout material 8 between them, and a PC steel material 3 is inserted through the through holes 13,
It is inserted by being inserted into 13 and is joined by being tightly connected. The column member 1 on the upper layer side is placed on the level adjusting material 9 laid on the column member 1 on the lower layer side as shown in FIGS. Grout material 8 in the gap
Is filled. The PC steel material 3 is the sheath 5 of both pillar members 1, 1.
5 is continuously inserted, and after the grout material 8 is hardened, the pillar member 1 is tensioned and fixed in the box-shaped cutout 15 from the side surface side. After the PC steel material 3 is tensioned, the sheath 5 is filled with the mortar grout material 10 and the notches 15 are filled with the filling mortar 18.

The sheath 5 on the upper end side of the pillar member 1 projects from the upper end of the pillar member 1, and the sheath 5 on the lower end side is drawn inside the concrete. When the upper pillar member 1 is installed, the sheath 5 on the lower end side thereof is installed. Are butted against the sheath 5 on the upper end side of the column member 1 on the lower layer side. At the abutting portion of the two sheaths 5, 5, a sealing material 30 having elasticity, which prevents the grout material 8 from flowing into the sheath 5, is installed. Here, the case where the pillar member 1 is formed hollow is shown, but in this case, the end face of the hollow portion 16 is covered with a lid 31 for preventing the inflow of the grout material 8.

When both the column member 1 and the beam member 2 are hollow members as shown in FIGS. 4 and 6, the column member 1 and the beam member 2 are manufactured by centrifugal force molding or steel form molding, and are hollow. The sections 16 and 24 have a circular cross section. The ratio of the cross-sectional area of the hollow portions 16 and 24 to the total cross-sectional area is determined by the proof stress required for each of the column member 1 and the beam member 2.

As shown in FIG. 5, the beam member 2 is installed between the adjacent pillar members 1 and 1 butted against the side surface of the pillar member 1, and the PC member extends between the insertion hole 23 and the insertion hole 14 of the pillar member 1. Steel material 4
Is inserted, and its end is tightly bonded to the side surface of the pillar member 1 and is fixed to be joined to the pillar member 1. When the beam member 2 is installed, the column member 1 supports the beam member 2 by a temporary support member 33 that is temporarily fixed to the side surface of the column member 1 on the beam member 2 side.

The gap between the beam member 2 and the column member 1 is also filled with the grout material 8. Here, too, in order to prevent the grout material 8 from flowing into the sheaths 7 and 6, a gap is formed between the sheaths 7 and 6. A sheath connecting device 34 is installed. This sheath connector 34
A material that is expandable and contractible and that expands due to a restoring force is used for the stopper 35, and as shown in FIG. 7, a stopper 35 that is temporarily fixed to the end of the beam member 2 until the beam member 2 is butted to the pillar member 1 and positioned. Is pulled into the space 25 of the double sheath provided at the end of the sheath 7 on the beam member 2 side, and the stopper 35 is removed after positioning, as shown in FIG. It extends and projects to and is accommodated in the space 17 of the double sheath provided at the end of the sheath 6.

The PC steel material 4 is tensioned after the grout material 8 between the beam member 2 and the column member 1 is hardened, and after the PC steel material 4 is tensioned, the mortar grout material 19 is pressed into the sheaths 6, 7.

FIG. 9 is a diagram showing an example of a frame structure in which the column member 1 is manufactured as a variable cross-section member whose cross-sectional area is changed in the middle of the axial direction.
Reference numerals 10 show examples of frame structures when the column member 1 is formed by two layers.

[0024]

The present invention is as described above, and the main members of the precast concrete column member and the beam member, which are reinforced in the concrete, are housed in the concrete, the column members are joined together, and the column member and the beam member are joined together. Since the joining is done by PC steel material, it is not necessary to connect the reinforcing bars at the joint and concrete is placed, and the site work for the joint is simplified, and the column members and beam members are the same as steel frame materials. Since it can be handled, the building method is simplified and the construction work is greatly labor-saving.

Further, since it is not necessary to place concrete on the joint site, the quality of concrete as a whole does not vary.

In addition, by introducing prestress to the beam member by the tension of the PC steel material that joins the beam member to the column member, it is possible to cope with a frame with a large span and a large load. It is also possible to increase the proof stress of the beam by applying prestressing by.

Further, while the column members and the beam members satisfy the respective required proof stresses, the weight is reduced by forming the central portion on the cross section perpendicular to the axis to be hollow, thereby improving the efficiency of transportation and construction. Planned. In this case as well, there is no need for integration with post-cast concrete, which saves construction labor and does not cause problems of concrete quality.

[Brief description of drawings]

FIG. 1 is an elevational view showing an assembled state of a column member and a beam member.

FIG. 2 is a vertical cross-sectional view showing a state of reinforcement of a column member and a beam member.

FIG. 3 is a vertical cross-sectional view showing a joint portion between pillar members.

FIG. 4 is a cross-sectional view of the position of the joint in FIG.

FIG. 5 is a vertical cross-sectional view showing a joint portion between a beam member and a column member.

FIG. 6 is a cross-sectional view orthogonal to the axis showing the beam member.

FIG. 7 is a vertical cross-sectional view showing a state when a sealing material is installed between a beam member and a column member.

FIG. 8 is a vertical cross-sectional view showing an installed state of the sheath connecting device.

FIG. 9 is an elevational view showing the frame when the cross section of the pillar member is changed in the axial direction.

FIG. 10 is an elevational view showing a frame in the case where a column member is formed by two layers.

[Explanation of symbols]

1 …… Column member, 11 …… Main bar, 12 …… Main bar restraint bar, 13 ……
Insertion hole, 14 ... Insertion hole, 15 ... Notch, 16 ... Hollow part,
17 …… double sheath space, 2 …… beam member, 21 …… main bar,
22 …… Main bar restraint, 23 …… Insertion hole, 24 …… Hollow part, 25…
… Double sheath space, 26 …… groove, 3 …… PC steel, 4 ……
PC steel, 5 ... sheath, 6 ... sheath, 7 ... sheath,
8: grout material, 9: level adjusting material, 30: sealing material, 31: lid, 10: mortar grout material, 18: stuffed mortar, 19: mortar grout material, 33: temporary support material , 34 …… Sheath connection device.

Claims (2)

[Claims] 1. A method of constructing a frame structure using a column member and a beam member made of precast concrete, which is manufactured by embedding a main bar and a main bar restraint bar in concrete in a completed state. An insertion hole communicating from the side surface to the end surface is opened at the position, and an insertion hole penetrating in the axial direction over the entire length is opened between both end surfaces of the beam member, and the middle portion of the pillar member is connected to the beam member. At the position, an insertion hole that is continuous with the insertion hole of the beam member and penetrates between the side faces is opened, the column members that are continuous in the vertical direction are abutted against each other, and the PC steel material is inserted into the insertion hole that is opened in each column member. Then, the two pillar members are joined together by tightly connecting them, and the beam member is abutted on the side surface of the pillar member and installed between the adjacent pillar members, and the PC is inserted into the insertion hole of the beam member and the insertion hole of the pillar member continuous to this. Insert the steel material and tighten it to join the beam member to the column member. How to build a Frame by Rekyasuto member. 2. The frame made of a precast member according to claim 1, wherein the pillar member and the beam member both have respective required yield strengths, and the central portions on the cross section perpendicular to the axis are both hollow. How to build.