JPH0678404U - Precast concrete beam-column joint structure - Google Patents

Abstract

(57) [Summary] [Purpose] Precast concrete columns and beams are joined easily, quickly and firmly. [Structure] The bars 3 are provided on the upper and lower pillars 1A and 1B so as to project,
Further, pipes 4 are provided on the front, rear, left and right beams 2C and 2D, and the rods 3 and the pipes 4 are fitted to each other to join columns and beams made of precast concrete.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a column-beam joint structure for constructing columns and beams, which are structural members of RC and SRC structures, with precast members.

[0002]

[Prior art]

 When constructing a building using columns and beams of precast members, the reinforcing bars protruding from the ends between the pieces are joined by various methods, and then concrete is placed at the joints.

[0003]

[Problems to be solved by the device]

 By the way, the purpose of making the members PC is to use concrete members, which are inexpensive to manufacture, and to construct them as fast as steel frame assembly.

However, in the conventional construction method, it is necessary to support another temporary structure, such as a pipe support and a temporary beam, until the concrete cast into the joint exhibits a predetermined strength.

[0007] Therefore, there is a type in which a joint can be joined with the same ease as that of a steel frame, and at least several stories above the joint can be built without waiting for the strength of the concrete to develop. And the advantages of using a PC will be maximized.

Therefore, an object of the present invention is to provide a precast concrete beam-column joint structure that can meet such demands.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a structure in which column beams made of precast concrete are joined, and at least four rods or pipes project from the joining ends of the upper and lower columns respectively in the axial direction of the columns, and the front, rear, left and right Provide the pipes or rods to be fitted with the rods or pipes of the upper and lower columns, respectively, at the joint ends of the beams, and fit the rods or pipes of the upper and lower columns and the pipes or columns of the front, rear, left and right beams respectively. Precast concrete beam-column joint structure.

[0008]

[Action]

 First, build the lower pillar. Next, the rod or pipe of the lower pillar and the pipe or rod of the beam, where the front, rear, left, and right beams are built at the installation destination, are fitted together. Next, the pipe or rod of the beam in which the upper column is built at the installation destination and the rod or pipe of the upper column are fitted together. In this way, the columns and beams are joined and concrete is placed at the joints, but since the joint structure between the columns and beams is strong, it is possible to construct several stories above the joint without waiting for the strength of the concrete to develop. Can be included.

[0009]

【Example】

 1 to 5 show a first embodiment of the present invention, in which both columns and beams are columns and beams made of precast concrete. Four rods 3 are provided so as to project from the joining ends of the upper and lower columns 1A and 1B, respectively, in the axial direction of the columns, and the upper and lower columns 1A are provided at the joining ends of the front and rear and left and right beams 2A, 2B, 2C, and 2D. Each of the pipes 4 is fitted with the rod 3 of 1B.

In the assembly procedure, first, the lower pillar 1A is built. Next, the pipes 4 of the beams 2A, 2B, 2C, and 2D are fitted to the rods 3 of the lower pillar 1A in which the beams 2A, 2B, 2C, and 2D on the front, rear, left, and right are installed at the installation destination. Then, the rod 3 of the upper pillar 1B is fitted to the pipe 4 of the beams 2A, 2B, 2C, and 2D in which the upper pillar 1B has been built at the installation destination. Concrete is placed at the joint between the columns and beams thus joined.

6 to 8 show a second embodiment of the present invention. In this embodiment, it is a pipe 4 projecting from the pillar 1, and a beam 4 is fitted on the pipe 4 of the pillar 1. It is a stick 3 that fits. The assembly procedure may be performed in the same manner as in the first embodiment.

In the first and second embodiments, there are four rods 3 or pipes 4 projecting from the pillar 1 corresponding to the front, rear, left and right beams 2, and the pipes 4 or rods provided on the beam 2 In the example shown in FIG. 9, two rods 3 or pipes 4 are provided on the column 1 for each beam, and three rods 3 or pipes 4 are projected on the column 1 and two beams 2 are provided for each beam. A pipe 4 or a bar 3 of a book is provided.

In the example of FIG. 10, the pipe 4 or the rod 3 provided on the beam 2 is divided into those for the upper pillar and those for the lower pillar.

[0014]

[Effect of device]

 The columns and beams can be joined simply by fitting the rods or pipes protruding from the joint ends of the columns and the pipes or rods provided at the joint ends of the beams. As with steel frame assembly using beams, it can be easily and quickly constructed. In particular, no other joining means such as bolts and nuts are used for joining the beam to the column, so that the work can be done more easily and quickly without the need for tightening work. Further, since the beam-column joint is strong by itself, it is possible to construct at least several stories above the beam-joint without waiting for the strength of the concrete placed in the beam-column joint to develop. This maximizes the merit of using PC for columns and beams.

[Brief description of drawings]

FIG. 1 is a front view of a precast concrete column beam according to a first embodiment of the present invention before being joined.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view in which precast concrete column beams are joined together.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view showing a part of a main portion in section.

FIG. 6 is a front view of a precast concrete column beam according to a second embodiment of the present invention before being joined.

FIG. 7 is a plan view of FIG.

FIG. 8 is a front view showing a part of a main portion in a cross section.

FIG. 9 is a front view of a modification of the first and second embodiments before joining precast concrete column beams.

FIG. 10 is a plan view of another example of a beam joint.

[Explanation of symbols]

 1A, 1B ... Pillar 2A, 2B, 2C, 2D ... Beam 3 ... Rod 4 ... Pipe

Claims (1)

[Scope of utility model registration request] 1. In a structure for joining precast concrete pillar-beams, at least four rods or pipes project in the axial direction of the pillars from the joining ends of the upper and lower pillars, respectively, and the joining ends of the front, rear, left, and right beams are vertically arranged. A pipe or rod that fits with the rod or the pipe of the column is provided respectively, and the rods or pipes of the upper and lower columns and the pipes or columns of the front, rear, left, and right beams are fitted respectively, and are made of precast concrete. Beam-column joint structure.