JPH09158317A - Joint structure of precast concrete beam - Google Patents

Abstract

(57) [Abstract] [Problem] Precast concrete construction is carried out by completely dry-type construction, the construction period is shortened, and large beams can be converted into double beams to form double walls, increasing the degree of freedom in plan planning. Provide a joint structure of concrete columns and beams. SOLUTION: A horizontal beam mounting portion piece 3 is integrally projected from a beam mounting portion of a precast concrete pillar member 1,
The respective beam attachment parts are sandwiched between the front and back precast concrete girder members 5, and the same girder members and the beam attachment parts 3 are rigidly connected by bolts 6 and nuts 7. The girder member 5 constitutes a double girder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for precast concrete columns and beams.

[0002]

2. Description of the Related Art In the conventional precast reinforced concrete construction method, cast-in-place concrete c must be cast at the joint between the pillar piece a and the beam piece b, and the girder has one cross section. (See Fig. 7)

[0003]

In the above-mentioned conventional construction method, as described above, the wet work of in-place concrete pouring remains at the joint portion of the pillar and beam pieces, and the pouring concrete hardens. It takes a considerable waiting time to develop the required strength. Further, since the precast concrete girder is composed of a single member, there is a problem that it cannot be made into a double wall.

The present invention has been proposed in view of the above-mentioned problems of the prior art. The object of the present invention is to perform a complete dry-type construction using a precast concrete member, shorten the construction period, and double the girder. The point is to provide a joint structure of precast concrete column beams that allows the construction of double walls by constructing beams and increases the degree of freedom in plan planning.

[0005]

In order to achieve the above-mentioned object, the joint structure of a precast concrete column beam according to the present invention has a horizontal beam mounting piece integrally projecting from a beam mounting portion of a precast concrete column member. The beam mounting parts are sandwiched between front and back precast concrete girder members, and the same girder members and the beam mounting parts are rigidly coupled with each other via bolts and nuts. It is characterized in that a double beam is formed by a large beam member.

Further, according to the present invention, a precast column member and a precast concrete girder member are tightly joined together by bolts and nuts at respective positions occupying the vertices of a triangle.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a precast concrete column member, and a beam attachment portion piece 3 having a bolt attachment hole 2 penetrating through the joint surface of the column-beam joint portion with respect to each beam member in the column-beam joint portion is horizontally projected.

As shown in FIG. 2, a pair of front and back precast concrete girder members are provided on the beam mounting portion 3 of the precast concrete pillar member 1 at positions corresponding to the bolt mounting holes 2 and through which bolt mounting holes 4 are respectively passed. As shown, the beam mounting pieces 3 are sandwiched, and the bolt mounting holes 2 of the beam mounting pieces 3 and the precast concrete girder member 5 are attached.
The bolt 6 is inserted through the bolt mounting hole 4 and tightened with the nut 7, and the large beam is made into a doubled precast concrete beam.

At this time, when the pillar piece and the beam piece are mounted, the bolt mounting portion 3 and the precast concrete girder member 5 are also connected to each other at the positions occupying the apexes of the triangle by using the nut 7 to form the triangular pin connection. Make a rigid joint. In the figure, 8 indicates the upper floor. By thus forming the precast concrete girder as a double precast concrete beam, it is possible to provide a dedicated wall in which the partition wall of the building is doubled, and the dedicated partition wall 9 is provided with openings 10 for ventilation, intake, etc. freely. Install or install equipment pipe 1 in the middle of double wall
1. Wiring can be performed.

[0010]

As described above, according to the present invention, a horizontal beam mounting member is integrally projected from a beam mounting portion of a precast concrete column member, and each beam mounting member is sandwiched between front and back precast concrete girder members. As you wear
By joining the same large beam member and the beam mounting member with bolts and nuts, a dry structure in which all the joints of the precast concrete column member and the beam member are attached with bolts and nuts By eliminating the construction section, the construction can be significantly simplified and the construction period can be greatly shortened.In addition, the precast concrete large beam can be made into a double beam, and the double beam can be used as a double wall, increasing the degree of freedom in plan planning. However, the inside of the double wall can be used as a space for piping, ventilation equipment, etc., and the maintenance of these equipment is easily performed, and the structural performance is increased by the double beam of the precast concrete beam member. Is.

According to the second aspect of the present invention, when the precast concrete pillar member and the precast concrete girder member are joined, the girder member and the pillar member are connected by bolt nuts at positions occupying the vertices of a triangle. Are rigidly joined.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a joint structure for precast concrete column beams according to the present invention.

FIG. 2 is a plan view of FIG. 1 showing a mounting state of a precast concrete girder member to a precast concrete column member.

FIG. 3 is a front view showing a state immediately before joining the precast concrete column beams.

FIG. 4 is a front view showing a joint portion of a precast concrete column beam.

FIG. 5 is a vertical cross-sectional view of a structure having a girder double-beamed according to the present invention.

FIG. 6 is a perspective view of a beam-column joint formed according to the present invention.

FIG. 7 is a perspective view showing a conventional structure.

[Explanation of symbols]

 1 Precast concrete pillar member 2 Bolt mounting hole 3 Beam mounting piece 4 Bolt mounting hole 5 Precast concrete large beam member 6 Bolt 7 Nut 8 Upper floor 9 Exclusive partition wall 10 Opening 11 Facility piping

Claims (2)

[Claims] 1. A horizontal beam attachment piece is integrally projected from a beam attachment portion of a precast concrete column member, and each beam attachment portion piece is sandwiched between front and back precast concrete large beam members, and the same beam is attached. The joint structure of precast concrete column beams, characterized in that the girder member and the beam mounting portion are rigidly coupled to each other via bolts and nuts, and a double girder is constituted by the pair of precast concrete girder members. 2. The precast concrete beam-column joining structure according to claim 1, wherein the precast column member and the precast concrete girder member are rigidly joined together by bolts and nuts at positions occupying the vertices of a triangle.