JPH0749681B2 - Steel frame / reinforced concrete composite construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for constructing a building of a composite structure of steel frame and reinforced concrete, in which the grits are made of steel and the columns are made of reinforced concrete.

"Conventional technology" As a construction method for constructing a building of this type of composite structure, assembling a reinforcing bar to be a pillar on the site, and further fixing a steel frame to be a beam to this reinforcing bar and assembling,
After forming a mold around the reinforcing bars and the joint (joint between the column and the beam), the pillar and the joint are formed by placing concrete inside the mold to form the structure of the building. It is common practice to build a.

"Problems to be solved by the invention" However, in the construction method as described above, after assembling the reinforcing bars and the steel frames, the formwork is assembled at the portion where the concrete is placed, and then the concrete is placed inside the formwork. Since it is designed to cast concrete, it is necessary to have a scaffold for assembling the formwork at the site, a place and equipment for placing concrete, as well as for assembling formwork and concrete. The large number of workers is required, which causes the delay in construction period and the increase in construction cost. Moreover, the unevenness of the quality of the placed concrete due to the weather conditions and other various conditions for placing the concrete on site. There was a problem such as what could be done.

The present invention has been made in view of the above problems, in constructing a building of a steel frame / reinforced concrete composite structure,
An effective construction method that can save labor on site, eliminate waste of work space on site, shorten construction period and construction cost, and also improve concrete strength to improve structural strength. Is intended to provide.

"Means for Solving the Problem" In order to achieve the above-mentioned object, the present invention is directed to joining a steel beam to a reinforced concrete column via a connection member, and a structure of a steel frame-reinforced concrete composite structure in which a frame is constructed. A construction method for constructing a building, wherein the reinforced concrete column is pre-manufactured in advance as a precast concrete member having column main bars protruding above and below it, and the joint member is connected to the steel beam. A beam mounting member, and a concrete part which is integrated with the beam mounting member and is continuously provided above the reinforced concrete column, and a through hole for inserting a column main bar of the reinforced concrete column is formed in the concrete part. As a matter of course, this joint member was prefabricated in advance as a precast concrete member, and then The cleat column and the joint member are respectively carried into the site, and after the reinforced concrete column is erected, the column main bar protruding above is inserted into the through hole so that the joint member is above the reinforced concrete column. It is characterized by constructing a skeleton by mounting and fixing and connecting the steel beam to the beam attachment member of the connection member.

"Operation" In the present invention, a reinforced concrete column manufactured in advance as a precast concrete member is carried into the site and erected at a predetermined position, and a joint member also manufactured in advance as a precast concrete member is placed and fixed on the upper part thereof. The structure is constructed by connecting steel beams to the connection member, and therefore the formwork assembling work and concrete placing work on site can be minimized.

The joint member used in this construction method has a beam attachment member to which a steel beam is directly connected, and a concrete portion integrated with the beam attachment member, and a through hole formed in the concrete portion. The connection member is fixed to the reinforced concrete column by inserting the column main bar into, and therefore, the steel beam and the reinforced concrete column are structurally and firmly integrated through this connection member.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a side view showing a portion of a skeleton A of a building having a composite structure of a steel frame and a reinforced concrete constructed by the construction method of this embodiment, particularly a portion thereof, and FIG. 2 is a plan view thereof.

This skeleton A is a column 2 made of precast concrete (PC) which is pre-manufactured in advance in a state in which an inner portion and a main rod 1 and a band (not shown) for supplying the same are arranged, and the column 2.
The connecting member 3 is attached to the upper part of the main bar 1 while being inserted into the main bar 1.

The pillars 2 are provided so that the main bars 1 project from the upper and lower ends of the pillar body. , Is connected to the main bar 1 projecting to the pillar 2 of the upper layer, and a band 5 is provided around the main bar 1 of the connecting portion.

Further, as shown in FIG. 2, the connection member 3 is attached to the beam attachment member 7 made by combining H-shaped steels in a cross shape and the side portion of the beam attachment member 7, and the column attachment member 3 is attached. Steel smart body 8 formed in the same shape as the cross-sectional shape of 2
And a concrete portion 9 formed by pouring and filling the inside of the smart body 8 with a through hole 10 for attaching the joint member 3 to the main bar 1. Are formed in advance. A beam 6 made of H-shaped steel having the same cross-sectional shape as the beam mounting member 7 is fastened and connected to the beam mounting member 7 with a bolt 12 via a reinforcing plate 11.

Reference numeral 13 in the figure is a floor plate that also serves as a mold for forming a slab. Further, the connection portion 14 between the pillar 2 and the concrete portion 9 of the connection member 3 is filled with grout material.

Next, a work procedure for constructing the building body A of the building will be described.

* First, the pillar 2 and the connection member 3 are manufactured in advance in the factory.

The pillar 2 is arranged in a form (not shown) so that both ends of the main bar 1 assembled into a predetermined shape by a band or the like are arranged, and then concrete is placed inside the form. By doing so, it will be manufactured as a PC member.

Further, the connection member 3 is formed by assembling a H-shaped steel into a cross shape to form a beam attachment member 7, and is formed outside the beam attachment member 7 at the same height as the beam and in the same shape as the cross-sectional shape of the column 2. It is manufactured by fixing the steel beam body 8 and pouring and filling the inside of the smart body 8 to form the concrete portion 9.

In addition, by using high-strength concrete, fiber reinforced concrete, or the like as the concrete constituting the pillar 2 or the connecting member 3, it is of course possible to improve the structural strength of the pillar 2 or the connecting member, and of course the inside of the smart body 8 It is optional to arrange the reinforcing bar in the position of the enemy.

* After the pillar 2 and the connecting member 3 are carried into the site and the pillar 2 is erected at a predetermined position, as shown in FIG.
The connecting member 3 is attached to the upper portion of the pillar 2 by inserting the main bar 1 protruding to the upper part of the into the through hole 10 of the connecting member 3. Then, the beam 6 is joined to the beam attachment member 7 of the connection member 3.

* The main bar 1 protruding above the connecting member 3 attached above is connected to the main bar 1 protruding below the pillar 2 on the upper floor via the connecting member 4, and the pillar 2 is built. In addition,
A stirrup 5 is provided around the main bar 1 at the connecting portion (see FIG. 1).

* The building will be constructed by repeating the above steps.

In addition, the connection part of the pillar 2 is provided with a stencil around the periphery as in the conventional case, concrete is placed therein, and
By injecting grout material between the connection member and the connection member 3, the concrete between the pillar 2 and the connection member 3 and the intermediary between the concrete portion 9 of the connection member 3 and the main bar 1 are buried. Improve the adhesion of these.

According to the above construction method, the pillars 2 and the connection members 3 which are preliminarily manufactured as PC members in the factory are assembled on site, so scaffolding for assembling molds and concrete are assembled on site. A place and equipment for pouring are unnecessary, and it is possible to eliminate workers for stencil assembly and concrete pouring,
As a result, it is possible to shorten the construction period and eliminate the construction cost. In addition, since the pillars 2 and the connection members 3 are manufactured in the factory, they are less affected by weather conditions and other various conditions as in the case where a large amount of concrete is placed on site, and the quality is precise in the factory. Can manage
It is possible to manufacture high-quality PC members, and as a result, it is also possible to improve the structural yield strength of the skeleton A constructed using them.

"Effects of the Invention" As described above, according to the structure of the present invention, a reinforced concrete column and a joint member are manufactured in advance as a precast concrete member in a factory, and then carried into the site and assembled, and the joint member is Since the frame is constructed by connecting steel beams, it is possible to save labor such as on-site formwork assembly, scaffolding assembly, concrete placement, etc. The required equipment and working space can be reduced, and the construction period can be shortened and the construction cost can be eliminated. In addition, since reinforced concrete columns and connection members are manufactured in a factory, it is possible to improve the quality of concrete and structural strength.

[Brief description of drawings]

FIGS. 1 to 3 show an embodiment of the present invention, and FIG. 1 is a side view in the vicinity of a joint portion of a skeleton of a building constructed by a composite structure of steel frame and reinforced concrete of this embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is an explanatory view showing a situation in which a connecting member is attached to the upper part of a pillar. A: frame, 1 ... main bar (column main bar), 2 ... column (reinforced concrete column), 3 ... connection member, 6 ... beam (steel beam), 7 ... beam mounting member, 9 ... concrete Department, 10 ...
… Through holes.

Claims (1)

[Claims] 1. When constructing a building of a composite structure of steel frame and reinforced concrete in which a frame is constructed by joining steel slag to a reinforced concrete column through a connecting member, the reinforced concrete column is arranged above and below the reinforced concrete column. While pre-manufacturing in advance as a precast concrete member with pillar main bars protruding, the joint member is a grout mounting member to which the steel frame is connected, and an upper part of the reinforced concrete pillar that is integrated with the gruel mounting member. While having a concrete portion continuously connected to, as the through hole is formed in the concrete portion through which the column main bar of the reinforced concrete column is inserted,
This joint member was prefabricated as a precast concrete member in advance, and each of these reinforced concrete columns and joint members were brought into the site, and after the reinforced concrete columns were erected, the column main bars protruding above were penetrated. A steel frame characterized by constructing a skeleton by connecting and fixing the joint member on the upper part of the reinforced concrete column by inserting it through a hole, and connecting the steel frame to the leech mounting member of the joint member. Reinforced concrete composite construction method.