JPH06336782A - Floor frame constructed of combined precast member - Google Patents

Abstract

PURPOSE:To provide a floor frame that can be constructed easily of precast members and is capable of transmitting floor load in dispersion to girders in two directions in relatively simple structure for a building in which earthquake resisting elements are arranged to its periphery. CONSTITUTION:Four columns 1B1-1B4, positioned at vertices of a rhombus with one column 1A positioned at its center, are spanned respectively with girders 3 at their capitals 2, and beams 4 are stretched between each of the middle parts of the girders 3 and the capital 2 of the column 1A at the center. Two rectangular floor boards 5 are laid in a small section surrounded by the girders 3 and the beams 4 and are sustained with the girders 3 and the beams 4. In the adjacent small section, the rectangular floor boards 5 are laid in the direction different at an angle of 90 deg., and the floor boards 5 looking toward the different directions are laid checkerwise. Floor load is transmitted through the girders 3 and the beams 4 on one side to the girders 3 and the beams 4 on the other side, and can be transmitted in dispersion to the girders 3 in two directions without using cross girders.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor frame constructed by combining precast members in a building in which seismic resistant elements are arranged around the outer circumference.

[0002]

2. Description of the Related Art When designing a floor frame structure of a building in which seismic resistant elements are arranged around the outer circumference, only the vertical stress is targeted. Therefore, conventionally, a flat slab structure or a rigid frame structure with a relatively small cross section is used. Economically designed. In terms of construction method, the rationalized construction method is rarely adopted, and there are still many conventional types (wooden formwork + support work).

[0003]

However, considering the environment surrounding the future construction industry (decrease in wooden formwork, decrease in construction workers, etc.) A rationalized construction method is desired.

Therefore, a construction method has been considered in which the columns, beams, and floorboards are composed of divided precast members to reduce the use of wooden formwork and to eliminate unsupported construction. Then, it becomes a unidirectional plate, and the floor load concentrates on the unidirectional girder, and the floorboard becomes large, so it is not easy to precast. In addition, if grid beams are used to disperse and transfer the floor load to the large beams in two directions, the construction will be troublesome.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a floor load to a large beam in two directions with a relatively simple structure in a building in which seismic resistant elements are arranged around the outer circumference. An object of the present invention is to provide a floor frame structure that can be distributed and transmitted and can be easily precast.

[0006]

A floor frame structure according to the present invention is a floor frame structure in which a pillar, a capital, a beam, and a floor plate in a building in which seismic resistant elements are arranged around the outer periphery are composed of precast members (the pillar is not limited to the precast members. Instead, it may be cast on site.)
In the above, a large beam is bridged between the capitals of the four pillars that surround one central pillar, and a beam is bridged between the capital of the central pillar and the middle part of the four pillars. A floorboard is arranged in a small section composed of and supported by a large beam and a small beam.

[0007]

In the above structure, the use of wooden formwork is reduced by using the pillars, beams, etc. as precast members,
Unsupported work can be achieved. The floorboard is supported by girders and girders, and the floor load is transmitted to one girder and the other girder via the girder, and is distributed and transmitted to the girders in two directions without using a grid beam.

Further, by arranging the floor plates of different directions in a checkerboard pattern, the floor load can be evenly transmitted to the girders in two directions.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an illustrated embodiment. FIG. 1 is a plan view showing a floor frame according to the present invention, FIGS. 2 (a) to 4 are partial sectional views of the floor frame in FIG. 1, and FIG. 5 is a schematic sectional view showing a construction procedure of the floor frame. .

As shown in FIGS. 1 to 4, the floor frame structure according to the present invention is mainly composed of a pillar 1, a capital 2, a girder 3,
It consists of beam 4 and floor board 5, and these are divided by a precast member. The pillars may be cast on site.

The pillars 1 are arranged with a predetermined span, and
Between 4 Pillars 1B ₁ ~1B ₄ Capital 2 located at the apex of the rhombus around the pillars 1A looped the girder 3,
A small beam 4 is bridged between the capital 2 of the central pillar 1A and the middle portion of the large beam 3. These large beams 3 and small beams 4 are diagonal 4
It will be arranged at 5 °.

As shown in FIG. 2, the capital 2 has a ring shape and is locked to a locking projection 1a provided on the column 1. Further, a support step portion 2a is formed by notching the upper portion on the outer peripheral portion thereof. A supporting projection 3a is formed by notching the lower part on the upper part of both ends of one girder 3.
The support protrusion 3a is supported by the support step 2a. A cotter insertion hole is formed in each of the support step portion 2a and the support convex portion 3a, and a slip prevention cotter 7 is inserted into the hole to connect the capital 2 and the girder 3.

As shown in FIG. 3, on both sides of the girder 3,
A support step 3b is formed by notching the upper part, and one end of the beam 4 is supported by this support step 3b. The other end of the beam 4 is supported by the support step 2 a of the capital 2.
The small beam 4 and the capital 2 and the large beam 3 are also connected to each other via a slip prevention cotter 7.

As shown in FIG. 1, the floor board 5 has a rectangular shape, and two floor boards 5 are arranged in a small section surrounded by the large beam 3 and the small beam 4.
It is supported by the large beam 3 and the small beam 4. In the adjacent small sections, the directions of the rectangular floorboards 5 are different by 90 °, and the floorboards 5 having different directions are arranged in a checkered pattern.

With the above structure, the floor is constructed as follows.

(1) The precast pillar 1 is built or the pillar 1 is constructed by casting in situ.

(2) The block of the capital 2 is installed on the pillar 1. A wedge member 6 is inserted into the gap between the pillar 1 and the capital 2 and temporarily fixed.

(3) The girder 3 is installed. The girder 3 and the capital 2 are connected by a cotter 7.

(4) The beam 4 is installed. The small beam 4, the capital 2 and the large beam 3 are connected by a cotter 7.

(5) The grout 8 is injected into the gap between the pillar 1 and the capital 2, the capital 2 and the large beam 3 and the small beam 4, the gap between the large beam 3 and the small beam 4, and the cotter insertion portion.

(6) The floor board 5 is laid.

(7) A reinforcing bar 9 is arranged on the upper portion of the capital 2, and a post-cast concrete 10 is poured. Reinforcing bars 9 are also arranged on the large beams 3 and the small beams 4, and post-cast concrete 10 is placed.

If necessary, post-casting concrete 11 is placed on the entire surface of the floor to form a synthetic floor to further improve the quality.

[0024]

As described above, in the floor structure using the combination of the precast members according to the present invention, the girder is bridged between the capitals of the four pillars surrounding the central pillar, and the center pillar capital and the four girder intermediate Since a small beam is hung between the large part and the small part, and a floorboard is placed in a small section composed of these large beams and small beams to be supported by the large beams and small beams, a comparatively simple structure without using grid beams Thus, the floor load can be distributed and transmitted to the large beams in two directions, which facilitates the precasting of the floor frame.

In addition, the floorboard can also be relatively small and can be selected for factory precast or on-site precast.

[Brief description of drawings]

FIG. 1 is a plan view showing a floor structure according to the present invention.

2A is a sectional view taken along line II-II of FIG. 1, and FIG. 2B is a partial plan view of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a schematic sectional view showing a construction procedure of the floor structure according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pillar 1a ... Locking projection part, 2 ... Capital, 2a ... Support step part, 3 ... Large beam, 3a ... Support convex part, 3b ... Support step part,
4 ... beam, 5 ... floor board, 6 ... wedge member, 7 ... cotter, 8 ...
Grout, 9 ... Reinforcing bar, 10 ... Post-cast concrete, 11
… Post-cast concrete

Claims (2)

[Claims] 1. In a floor frame structure in which columns, capitals, beams, and floorboards are made of precast members in a building in which seismic resistant elements are arranged around the outer circumference, a large beam is provided between the capitals of the four columns surrounding one central column. Crossing over, a small beam is bridged between the capital of the center pillar and the middle part of the four girders, and a floorboard is placed in a small section composed of these girders and girders to be supported by the girders and girders. A floor frame composed of a combination of precast members. 2. The floor frame structure according to claim 1, wherein the directions of the floorboards differ by 90 ° between adjacent small sections, and the floorboards having different directions are arranged in a checkered pattern. Floor frame by combination.