JPH0726439B2 - Construction method of steel-framed reinforced concrete structure using precast members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a steel-framed reinforced concrete building structure, including columns, beams,
The present invention relates to a method of constructing a steel-framed reinforced concrete structure using a precast member, which is constructed by precasting floor structural members.

(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 problems of the prior art, the purpose of the purpose is to precast the structural members in a steel-framed reinforced concrete structure to save labor in the field construction and shorten the construction period. In addition, the present invention provides a method for constructing a steel-framed reinforced concrete structure using a precast member that ensures quality performance.

(Means for Solving the Problem) In order to achieve the above object, according to the method for constructing a steel-framed reinforced concrete structure using the precast member according to the present invention, the upper end portion of the column main bar with the splice sleeve fixed to the lower end portion is used. Is installed from the top of the pillar, and the bracket and beam main bar are projected outside the upper and lower ends, and the steel rebar PC column is installed in the specified position, then the sleeve is embedded in the main bar position and the steel column part is built in. A column-beam joining PC member in which the steel beam part is diverted from the outer periphery of the pillar part that has been installed, while the pillar main bar protrusion of the PC pillar is installed on the PC pillar so as to penetrate the sleeve,
A grout material is injected into the same sleeve, and then a steel beam rebar and a beam lower end main bar are embedded between the adjacent PC columns so that the ends project from both end faces.
A beam is built, and the steel beam protruding end of the PC beam and the beam-column connection
Weld each web of the steel beam part of the PC member with an attachment plate and high-strength bolts, weld each flange, and weld each projecting end of the beam bottom main bar of the PC beam and the beam main bar of the PC column. Then, the steel reinforced PC columns of the upper floor are then connected to the beam-joined PC member of the PC column stigma of the lower floor, and the column main bars of the lower floor columns protruding from the member are fitted into the splice sleeves of the upper floor columns. Built in the same, while bolting the lower bracket of the upper floor pillar and the steel beam part of the column beam joint PC member and the upper bracket of the lower floor pillar, injecting grout material into the sleeve, and then the upper floor Weld the beam main bar projecting from the lower end of the PC column and the beam upper bar placed on the steel frame rebar PC beam upper part, and then erection a half-PC floor plate between the PC beams, and join the same floor plate and the column-beam joint Concrete on the floor board as well as the PC member as well as the joint of the PC beam. The door is intended to pouring.

(Operation) According to the present invention, as described above, on the steel-framed rebar PC column built in a predetermined position, a column where the steel beam part is diverged from the outer periphery of the column part containing the steel frame part. By installing a beam-joined PC member, the sleeve embedded in the pillar portion piece in the same member, through the pillar main bar protruding from the pillar head of the PC pillar, by injecting grout material into the sleeve The column-beam bonded PC member is integrally fixed to the stigma of the PC column.

Then, between the PC columns in which the column-beam joining PC members are integrally installed on the sill like this, a steel-frame-reinforced PC beam is built, the projecting end of the beam steel frame in the PC beam, and the column-beam joining PC member While joining each web of the steel beam part piece diverged from the pillar part piece with the addition plate and the high-strength bolt, welding each flange, and the projecting end part of the beam lower end main bar of the steel frame rebar PC beam and the above By welding the projecting end portion of the beam reinforcement at the upper end portion of the PC column, the steel frame reinforcement PC beams are integrally joined between the adjacent steel frame reinforcement PC columns.

Next, the steel reinforced PC columns on the upper floor are built on the steel reinforced PC columns on the lower floor, and the splice sleeves of the PC columns are joined to the PC columns on the lower floor. Insert the main bar, while bolting each bracket of the upper and lower PC columns and the steel beam beam piece of the beam-column joining PC member, and by injecting grout material into the sleeve, the upper and lower steel rebar PC columns Join together.

Next, a half-PC floorboard is installed between the PC beams, concrete is placed on the floorboard, and at the joint between the floorboard and the PC beam column-beam joint PC member, and the same steps as above are repeated, and precast. A steel-framed reinforced concrete structure is constructed from the columns, beams, and floor members that have been constructed.

(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 a pillar steel frame (4) built in the PC pillar (A) are horizontally projected at the upper and lower ends of the PC pillar (A), and a beam penetrating the pillar. A lower end main bar (6) and a beam upper end main bar (6 ') are projected.

(B) is a beam-column jointed PC member, and a column steel frame (7) having the same cross section as the column steel frame (4) of the PC column (A) is built in, and a column main bar penetrating sleeve (8) is embedded in the column main bar position. The H-shaped steel beam member (10) joined to the pillar steel frame (7) is extended to the outer periphery of the pillar member (9), and the upper and lower flanges and the web of the steel beam member (10) are joined. A box-shaped stiffener (11) is integrally joined to and.

(C) is a steel rebar reinforced PC beam, and the beam steel frame (1
2) and the ends of the beam bottom main bars (13) project from the beam end face.

(14) in the figure is the ribs.

Then, the steel rebar PC column (A) is vertically installed at a predetermined position and the column main bar of the lower floor column projecting from the floor surface or the column installation rebar is attached to the lower end of the column main bar (1) of the column (A). It is fitted into the fixed splice sleeve (2) and fixed with an oblique support (15), and non-shrink mortar is poured into the sleeve (2). (See Fig. 1) Fig. 1 shows the PC pillar (A) on the bottom floor.

Then, the column-beam joining PC member (B) is dropped onto the stigma of the PC column (A), and the steel beam part (10) is seated on the bracket (5) above the PC column (A). At the same time, the projecting end portion of the column main bar (1) is pierced through the column main bar penetrating sleeve (8), and grout material is injected into the sleeve (8) to replace the column beam PC member (B) with the PC column (A). Fix to the stigma.

Next, the steel rebar PC beam (C) is installed between the PC columns (A) to which the PC members (B) adjacent to each other in both X and Y directions are joined,
(See FIG. 3) An attachment plate (16) is affixed across the steel beam portion (10) of the column-beam joint PC member (B) and the web of the beam steel frame (12) of the PC beam (C). , The high-strength bolts (17) are joined, and the flanges are welded to each other, and the beam bottom main bar (13) of the PC beam (C) and the beam rebar (6) of the column-beam bonded PC member (B) are connected. It is attached by close welding.

Next, connect the steel-framed steel reinforced PC column (A ') on the upper floor to the beam-column connection on the lower floor.
The column main bar (1) of the PC member (B) is inserted into the projecting portion of the column main bar (1) of the PC column (A) on the lower floor, which protrudes through the column main bar penetrating sleeve (8), and the column main bar (1) is inserted above. It is fitted into the sleeve of the PC pillar (A ') on the floor, and the lower end bracket (5') of the PC pillar (A) on the upper floor is seated on the steel beam part (10) of the pillar-beam-joined PC member (B). The bracket (5 '), the bracket (5) of the lower floor pillar (A), the steel beam part (10), the web reinforcing stiffener (11) and the upper and lower flanges of the beam part (10). Tighten and fix it with a long high-strength bolt (18) that passes through, check the verticality of the PC pillar (A), and then fix it with the diagonal support (19), and attach it to the splice sleeve (2) of the pillar (A). Grout non-shrink mortar. (See FIG. 4) Next, the beam reinforcements (6 ') of the upper floor PC columns (A') and the beam upper end reinforcements (20) on the column-beam jointed PC member (B) are welded together, and the PC beams (C ) And PC columns (A) and (A ') with ribs (21) at the main beam joints of each beam, and after assembling the formwork, a part of the truss rebar between the adjacent PC beams (C). A publicly known semi-PC floor board (D) protruding from the board surface is installed, and the above-mentioned floor board (D) and the above-mentioned beam-column-joined PC member (B), PC beam (C) and floor board (D)
Concrete (E) is poured into the joint of (1) to integrate these members (see FIG. 5), and the above steps are repeated to construct a steel-framed reinforced concrete structure using precast members.

(Effects of the Invention) According to the present invention, as described above, the steel-framed reinforced concrete columns and beam-column joints, which were conventionally constructed on-site, the steel-framed reinforced concrete beams, the floorboards are made of precast cast structural members, and these By assembling members on-site to construct a steel-framed reinforced concrete structure, and by producing most of the structural members at the factory in the frame work, the number of specialists on site is greatly reduced, and labor saving on-site is reduced. It is possible to improve the quality and performance by shortening the construction period.

According to a second aspect of the present invention, a box stiffener is provided in the web portion of the steel beam beam piece in the beam-column-bonded PC member to stiffen the steel beam beam piece, and at the same time, the upper and lower steel frame rebar PC columns By bolting the bracket and the bracket, the PC column can be integrally joined via the column-beam joining PC member.

In the invention of claim 3, 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 are built in, the upper end of the main bar of the column is projected from the stigma, and the lower end 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. In addition to making it possible to connect to the PC column, the main beam of the beam is projected from the end of the PC column so that it can be securely connected to the lower and upper main bars of the steel frame rebar PC beam installed between the PC columns. is there.

According to a fourth aspect of the present invention, the steel beam portion connected to the column steel frame is diverged from the outer periphery of the column portion including the column steel frame having the same cross-section as the column steel frame of the PC column and the column main bar penetrating sleeve. Thus, the PC pillar can be integrally attached to the stigma of the PC pillar, and the steel frame rebar PC beam can be simply and surely joined.

[Brief description of drawings]

1 to 5 are front views showing steps of an embodiment of a method for constructing a steel-framed reinforced concrete structure using a precast member according to the present invention, FIG. 6 is a front view showing a beam-column joint, and FIG. Is a plan view showing a stigma, FIG. 8 and FIG. 9 are perspective views along with a front view of a steel-framed rebar PC column, FIG. 10 is a perspective view of a column-beam joining PC member, and FIG. Beam-to-column connection to stigma
FIG. 12 is a perspective view showing a state in which a PC column member is installed, and FIG. 12 is a front view of a steel frame rebar PC beam. (A) …… Steel frame rebar PC column, (B) …… Column beam joint PC member,
(C) …… Steel frame reinforced PC beam, (D) …… Semi-PC floor board, (E)
…… Concrete, (1) …… Column main bar, (2) …… Splice sleeve, (4) …… Column steel frame, (5) (5 ′)…
… Bracket, (6) (6 ′) …… Beam rebar, (8) ……
Column main bar through sleeve, (9) …… Column piece, (10) …… Steel beam piece, (11) …… Stiffener, (12) …… Beam steel frame,
(13) …… Main beam bottom beam, (16) …… Additional plate, (17) (18)
…… High-strength bolt, (20) …… Beam top beam.

Claims (4)

[Claims] 1. A steel-framed PC column with a splice sleeve fixed to the lower end, the upper end of the column main bar protruding from the column head, and the bracket and the beam main bar projecting outside the upper and lower ends at a predetermined position. Next, the column-beam joining PC member in which the sleeve is embedded in the main column position of the column and the steel beam part is diverged from the outer periphery of the column part with the built-in rebar column part Installed so that the pillar main bar protrusion of the pillar penetrates the sleeve,
A grout material is injected into the same sleeve, and then a steel beam rebar and a beam lower end main bar are embedded between the adjacent PC columns so that the ends project from both end faces.
A beam is built, and the steel beam protruding end of the PC beam and the beam-column connection
Weld each web of the steel beam part of the PC member with an attachment plate and high-strength bolts, weld each flange, and weld each projecting end of the beam bottom main bar of the PC beam and the beam main bar of the PC column. Then, the steel reinforced PC columns of the upper floor are then connected to the beam-joined PC member of the PC column stigma of the lower floor, and the column main bars of the lower floor columns protruding from the member are fitted into the splice sleeves of the upper floor columns. Built in the same, while bolting the lower bracket of the upper floor pillar and the steel beam part of the column beam joint PC member and the upper bracket of the lower floor pillar, injecting grout material into the sleeve, and then the upper floor Weld the beam main bar projecting from the lower end of the PC column and the beam upper bar arranged on the steel beam rebar PC beam upper part, and then erection a half-PC floor plate between the PC beams and joining the same floor plate and the column-beam joint. Concrete on the floor board as well as the PC member as well as the joint of the PC beam. Method for constructing a steel reinforced concrete structure according Purekiyasuto member, characterized by pouring the door. 2. The precast according to claim 1, wherein a box-shaped stiffener is disposed 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. Construction method of steel-framed reinforced concrete structure by members. 3. The steel-reinforced steel-reinforced concrete column has a height from the floor surface to a lower part of the beam and has a built-in steel-framed column and a column main bar, and the column main bar has a splice sleeve fixed to the lower end and an upper end. 2. The method for constructing a steel-framed reinforced concrete structure using a precast member according to claim 1, wherein the portion is projected from the stigma, and the bracket and the beam main bar are projected on the outer circumferences of the upper and lower ends of the pillar. 4. A steel frame in which the column-beam joining PC member is connected to the column steel frame from an outer periphery of a column steel frame having the same cross section as the column steel frame of the PC column and a column main bar penetrating sleeve embedded therein. The method for constructing a steel-framed reinforced concrete structure using the precast member according to claim 1, wherein the beam pieces are diverged.