JPH0726440B2 - Method of joining steel-reinforced bar precast concrete columns and steel beams - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of joining pillar beams in a composite structure in which columns are made of steel reinforced concrete and beams are made of steel.

(Prior Art) Conventionally, in the method of constructing a steel-framed reinforced concrete structure, the required steel-framed members are processed in advance in a factory, carried into the site, and assembled, and then columns, beams, and floors are assembled from the lower floor in order to assemble concrete. Is used to build each floor one by one, or some of the members are precast and most of the remaining members are installed on site.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional method, many parts rely on on-site construction, and the construction of the parts requires specialized engineers such as steelwork, formwork, and rebar construction. In recent years, it has become difficult to secure personnel due to the chronic shortage of construction engineers. For this reason, there are problems such as process delays and quality assurance.

The present invention has been proposed in view of the above problems of the prior art, the object of the purpose is to reduce the labor and construction period of on-site construction in a composite structure in which the column is a steel reinforced concrete structure and the beam is a steel frame structure. An object of the present invention is to provide a method for joining a steel-framed rebar precast concrete column and a steel beam, which is shortened and ensures quality performance.

(Means for Solving the Problem) In order to achieve the above-mentioned object, according to the method for joining a steel-framed rebar precast concrete column and a steel beam according to the present invention, a splice sleeve is fixed to the lower end of a column main bar. A steel-framed rebar PC column with the upper end projecting from the column head and the bracket projecting on the outside of the upper and lower ends is installed in a predetermined position, and then the sleeve is embedded in the column main bar position and the column steel frame is built in. A column-beam-jointed PC member in which the steel-beam part is diverged from the outer periphery of the part is installed on the PC column so that the column main bar protrusion of the PC column penetrates through the sleeve, and the grout is attached to the sleeve. Inject the material, then build a steel beam between the adjacent PC columns, join both ends of the same steel beam and the steel beam pieces in the column beam joining PC member, then the steel reinforced PC column of the upper floor On the PC beam member of the PC column stigma on the lower floor , So that the pillar main bar of the lower floor pillar protruding from the same member fits into the splice sleeve of the upper floor pillar, and the lower bracket of the upper floor pillar and the steel beam portion and the lower floor pillar of the beam-column joining PC member The upper bracket is joined with the bolt and the grout material is injected into the sleeve.

(Operation) According to the present invention, as described above, the column beam in which the steel beam part is diverged from the outer periphery of the column part in which the column steel frame is built in on the steel frame rebar PC column built in the predetermined position. With a joint PC member installed, the sleeve embedded in the pillar piece in the member, through the pillar main bar protruding from the pillar head of the steel frame rebar PC pillar, injecting grout material into the sleeve Thus, the column-beam-joined PC member is integrally fixed to the stigma of the steel-framed rebar PC column.

Then, between the steel frame rebar PC columns in which the column-beam joining PC members are integrally installed on the sill like this, a steel beam is built, the projecting end of the steel beam, and the column part in the column-beam joining PC member By joining the steel beam part pieces diverged from one piece, the steel beam is integrally joined between the adjacent steel rebar PC columns.

Next, the steel-reinforced steel-reinforced concrete PC column on the upper floor is erected on the steel-reinforced-steel-reinforced PC pillar on the lower floor, and the splice sleeve of the steel-reinforced-steel-reinforced PC pillar is connected to the column-beam-bonded PC member joined on the steel-reinforced steel-reinforced PC pillar on the lower floor. By inserting the pillar main bar projecting into, the steel frame rebar PC pillar brackets of the upper and lower floors and the steel beam part of the pillar beam joint PC member are bolted together, and by pouring grout material into the sleeve, This is to integrally join the steel-reinforced steel-reinforced concrete columns with the steel beams.

(Examples) The present invention will be described below with reference to illustrated examples.

(A) is a steel reinforced PC column, having a height from the floor to the bottom of the beam, a splice sleeve (2) is fixed to the lower end of the column main bar (1), and the upper end is a beam from the column head It is projected by the length of the reinforcing bar joint length added. (3) shows the stirrups. Further, brackets (5) and (5 ') joined to the column steel frame (4) built in the column are horizontally provided at the upper and lower ends of the steel column PC column (A).

(B) is a column-beam jointed PC member, and a column steel frame (6) having the same cross section as the column steel frame (4) of the steel frame rebar PC column (A) is built in, and a column main bar penetration sleeve (7) is provided at the column main bar position. The H-shaped steel beam member (9) joined to the pillar steel frame (6) is diverted to the outer periphery of the embedded pillar member (8), and the steel beam member (9) is formed.
A box-shaped stiffener (10) is integrally joined between the upper and lower flanges of the web and the web, and a bolt hole (11) is formed at the end of the web.

(C) is a steel frame beam, and a bolt hole is formed in a portion of the web corresponding to the bolt hole (11) at the end of the web of the beam-column-bonded PC member (B).

Then, the steel rebar PC column (A) is vertically installed at a predetermined position, and the column main bar of the lower floor column protruding from the floor surface or the column installation rebar is the column main bar (1) lower end of the column (A). It is fitted into the splice sleeve (2) fixed to the above and fixed by an oblique support (not shown), and non-shrink grout is injected into the sleeve (2).

Next, the column-beam joint PC member (B) is replaced with the steel frame rebar PC column (A).
The steel beam part (9) is seated on the bracket (5) above the steel rebar PC column (A), and the projecting end of the column main bar (1) is attached to the column main bar through sleeve (7). The grouting material is injected into the sleeve (7) so as to penetrate, and the column-beam joint PC member (B) is fixed to the stigma of the steel-framed rebar PC column (A).

Next, the steel beam (C) is installed between the steel-frame-reinforced PC columns (A) to which the adjacent column-beam-joined PC members (B) are joined, and the steel-beam beam pieces of the column-beam joined PC members (B) are installed. An attachment plate (12) is abutted across (9) and each web of the steel beam (C), and a high-strength bolt (13) is inserted and tightened across the bolt holes of each web, and the space between the flanges is also tightened. Welded to the steel beam (C)
By connecting the steel beam to the steel beam part piece (9), the steel beam (c) is connected to the steel beam rebar PC via the column beam connecting PC member (B).
Join to the pillar (A).

Next, connect the steel-framed steel reinforced PC column (A ') on the upper floor to the beam-column connection on the lower floor.
Column main bar (1) of the steel frame rebar PC column (A) on the lower floor that protrudes through the column main bar penetrating sleeve (7) in the PC member (B)
The column main bar (1) into the sleeve (2) of the steel frame rebar PC column (A ') of the upper floor, and the lower end bracket of the steel frame rebar PC column (A) of the upper floor. (5 ') is seated on the steel beam part (0) of the column-beam bonded PC member (B), and the bracket (5') and the bracket (5) of the lower steel-reinforced PC column (A) are aligned. The steel beam part (9) is fastened and fixed with the web reinforcing stiffener (10) of the beam part (9) and long high-strength bolts (14) penetrating the upper and lower flanges, and the steel rebar PC column After confirming the vertical of (A), fix it with a diagonal support (not shown),
Growing non-shrinkable mortar on the splice sleeve (2) of the same column (A) to connect the upper and lower steel frame rebar PC columns (A) and (A ') and the steel beam (C) through the column beam joining PC member (B). To join.

(Effects of the Invention) According to the present invention, as described above, the steel-framed reinforced concrete columns and beam-column joining members that have been conventionally constructed on site are configured from factory-produced precast structural members, and the members and the steel beam are constructed on-site. By assembling and joining with each other to construct a composite structure consisting of columns of precast steel reinforced concrete structure and steel beams, and by manufacturing most of the structural members at the factory during the construction work, we will have a specialized technician on site. It is possible to drastically reduce the number, to save labor on site construction, shorten the construction period, and improve the quality performance.

According to a second aspect of the present invention, a box-shaped stiffener is disposed on the web portion of the steel beam portion in the beam-column jointed PC member to stiffen the steel beam portion, and the steel beam portion and the upper and lower floors. By bolting the respective steel-framed reinforcing-bar PC columns to the brackets, the steel-framed reinforcing-bar PC columns can be integrally bonded via the column-beam-bonded PC members.

In the invention of claim 2, the steel rebar PC column has a height from the floor to the bottom of the beam, the column main bar and the beam steel frame are built in, the upper end of the column main bar is projected from the stigma, and the lower floor is at the lower floor. By fixing the splice sleeve for connecting the pillar main bars of the pillars so that the upper and lower pillar main bars can be integrally bonded, and in addition to the fact that brackets are projected on the upper and lower ends of the pillars, the upper and lower pillars are integrated. It is designed to be joined to.

According to a fourth aspect of the present invention, the column-beam jointed PC member is the steel rebar
From the outer periphery of the pillar steel frame having the same cross-section as the pillar steel frame of the PC pillar and the pillar main bar penetrating sleeve, the steel beam part connected to the pillar steel frame is diverged to form the steel rebar PC The structure is such that it can be integrally attached to the stigma of the column and that the steel beam can be simply and surely joined.

[Brief description of drawings]

1 and 2 are longitudinal sectional views and front views, respectively, showing an embodiment of a joint between a steel frame rebar PC column and a steel beam joined by the method of the present invention, and FIG. Plan view of the member,
4 is a view taken along the line IV-IV of FIG. 3, FIG. 5 is a perspective view thereof,
Fig. 6 is a perspective view of a steel rebar PC column, and Fig. 7 is a steel rebar PC column.
It is a perspective view showing the state where the above-mentioned beam-column joining PC member was joined to the capital of a pillar. (A) …… Steel frame rebar PC column, (B) …… Column beam joint PC member,
(C) ... steel beam, (1) ... column main bar, (2) ... splice sleeve, (4) ... column steel frame, (5) (5 ') ...
… Bracket, (6) …… Column steel frame, (7) …… Column main penetrating sleeve, (8) …… Column piece, (9) …… Steel beam piece, (10) …… Stiffener, (12) …… Saddle plate, (13)
(14) …… High-strength bolt.

Claims (4)

[Claims] 1. A steel-reinforced PC column having a splice sleeve fixed to the lower end, the upper end of the column main bar projecting from the column head, and brackets projecting outside the upper and lower ends of the column to be erected at a predetermined position. A column-beam joint PC member in which a sleeve is embedded at the position of the main pillar of the pillar and the steel beam piece is diverged from the outer periphery of the pillar piece with the built-in pillar steel frame. Installed so that the part penetrates the sleeve, inject grout material into the sleeve, then build a steel beam between the adjacent PC columns, both ends of the steel beam and the beam-to-column joining PC member Join the steel beam part in, then the steel reinforced PC column of the upper floor on the column beam joining PC member of the PC column stigma of the lower floor, the column main bar of the lower floor column protruding from the member is the upper floor column Built so that it fits into the splice sleeve of the Column-beam joining method of joining a steel beam part of a PC member and an upper bracket of a lower floor column with a bolt, and injecting a grout material into the sleeve, a method for joining a steel-reinforced bar precast concrete column and a steel beam . 2. The steel frame according to claim 1, wherein a box-shaped stiffener is provided on the web portion of the steel beam portion of the column-beam joining PC member, and the stiffener is bolted to the brackets of the PC columns on the upper and lower floors. Joining method of reinforced concrete columns and steel beams. 3. The steel-reinforced-steel rebar PC column has a height from a floor to a beam below and includes a column steel frame and a column main bar, and the column main bar has a splice sleeve fixed to the lower end and an upper end. The method for joining a steel-framed rebar precast concrete column and a steel beam according to claim 1, wherein the portion is projected from the stigma, and brackets are projected on the outer circumferences of the upper and lower ends of the column. 4. The column-beam joining PC member is connected to the column steel frame from the outer periphery of a column steel frame having the same cross-section as the column steel frame of the steel frame rebar PC column and a column main bar penetrating sleeve embedded therein. The method for joining a steel-framed rebar precast concrete column and a steel beam with a precast member according to claim 1, wherein the steel-framed beam segment is extended.