JPS6351216B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rigid frame prefabricated structure whose frame is made of precast concrete members.

Conventionally, precast concrete members have been mainly used to construct the surfaces of structures such as walls and floors, and steel materials have been used as columns and beams. If appropriate joining is possible, in the current situation where precast concrete members are already constructed with sufficient strength and stability, constructing both columns and beams with the above precast concrete members would improve manufacturing accuracy, productivity, cost, etc. This is desirable in terms of

The present invention was made based on the above-mentioned circumstances, and consists of a column or a beam made of the above-mentioned precast concrete member, and a high-strength bolt attached to a coupler at the end of an unbonded PC steel rod built into the above-mentioned precast concrete member. By screwing together, the pillar
Each joint of the beam is connected with a box-shaped joint unit,
The present invention aims to provide a rigid frame prefabricated structure that can be constructed substantially entirely as a reinforced concrete structure by precasting.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 indicates a precast concrete member constituting a beam, 2 a precast concrete member constituting a column, and 3 a box-shaped joint unit made of a steel frame that connects these members.
The above precast concrete members 1 and 2
are four parallel unbonds, respectively.
It is equipped with PC steel bars 4, 5, and couplers 6, 7 are attached to both ends thereof, and fixing plates 8, 9 are fixed to the end surfaces of the precast concrete members 1 and 2. The box-shaped joint unit 3 has joint face plates 10 and 1 that are joined vertically.
1, and joint face plates 12, 1 to be joined to the beams on all sides.
3, 14 and 15, each having a bolt hole 17 through which a high-strength bolt 16 is inserted. Openings 18 are provided at the four corners for tightening high-strength bolts. In order to increase the strength of the unit 3, a cross-shaped reinforcing plate 19 is fixed inside. Moreover, a beam receiving member 20 for receiving a beam is provided on any one of the joint face plates 12 to 15. Furthermore, when joining the precast concrete members 1, 2 and the joining unit 3, a pair of wedge members 21, 22 are provided.
is used.

In such a configuration, the joining unit 3 and the precast concrete members 1, 2 can be joined by screwing the high-strength bolts 16 into the couplers 6, 7,
In addition, in order to finely adjust the length and increase the tensile force to the PC steel bar, the high-strength bolts 16 are screwed into the couplers 6 and 7 with the wedge members 21 and 22 interposed between them. , wedge members 21, 2 with a jack key etc.
2 and press them so that they slide against each other. In this way, the joining unit 3 and the precast concrete members 1 and 2 are joined.

In addition, for small and medium-sized buildings, all joint units made of steel can provide sufficient strength, but if the stress applied to the joint is large, it is also possible to pour concrete inside the joint unit.

As detailed above, the present invention comprises a precast concrete member incorporating an unbonded PC steel rod with couplers at both ends, a joint surface to be joined to columns on the upper and lower surfaces, and a joint surface to be joined to beams on all sides. It has a box-shaped joint unit that is bonded to the above-mentioned coupler with high-strength bolts, and a wedge member that is installed between the two when joining the two, so when building a reinforced concrete building, all frame configurations can be used. Components can be produced in a factory and can be provided with high quality, high strength, and low cost, and all that is required is assembly of each component on site.
Temporary materials such as formwork and supports are not required, shortening construction time and reducing costs. In addition, pre-stress can be easily introduced by tightening high-strength bolts and pushing apart with wedge members.Therefore, by reducing the beam size, it is possible to reduce weight and reduce costs by lowering the floor height. It becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the present invention;
FIG. 2 is a side view showing the structure of the joint, FIG. 3 is an exploded perspective view of the main parts, FIG. 4 is an assembled side view of the main parts, and FIG. 5 is an assembled plan view of the same. 1... Precast concrete member (column),
2... Precast concrete member (beam),
3...Joint unit, 4, 5...PC steel bar, 6,
7... Coupler, 8, 9... Fixing plate, 1
0, 11, 12, 13, 14, 15... Joint face plate, 16... High strength bolt, 17... Bolt hole, 1
8...Opening, 19...Reinforcement plate, 20...Beam support,
21, 22... Wedge members.

Claims (1)

[Claims] 1. A precast concrete member containing an unbonded PC steel rod with couplers at both ends, a joint surface to be joined to columns on the top and bottom, and a joint surface to be joined to beams on all sides, and attached to the above coupler with high-strength bolts. A rigid frame prefabricated structure characterized by comprising a box-shaped joint unit that is fastened and a wedge member that is installed between the two shafts when joining them.