JPH0621476B2 - Structure of complex building structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a large span building structure.

(Prior Art) Conventionally, a prestressed concrete structure or a steel frame structure has been generally used as a building structure with a large span.

(Problems to be solved by the invention) However, in a large span structure, the beam formation becomes large,
The height of the building increases because the floor height increases.

Structurally, the steel-framed reinforced concrete structure and the reinforced concrete structure have a limited span and are unsuitable for a frame having a large span structure.

Although the prestressed concrete structure and the steel frame structure are advantageous for a large span structure to some extent, the frame structure and the column cross section are large in the high-rise large span structure structure, which is not effective. Furthermore, in the case of a large-span prestressed concrete structure, it is necessary to consider the order of placing concrete and the order of tensioning the tensioned steel materials, because the tensioned steel materials are arranged on-site and the concrete is placed in the construction site.

(Means for Solving Problems) The present invention has been proposed in order to solve such problems, in which a beam member is integrally and horizontally projected from an intermediate portion of the pillar member, and the pillar member is provided. Also, horizontal T-shaped precast concrete members configured by introducing prestress to the beam members are arranged at both ends in the span direction, and the beam members of the intermediate steel frame are provided to the respective beam members facing each other in the same pair of horizontal T-shaped precast concrete members. It relates to the structure of a composite building structure characterized by joining both ends.

(Operation) In the present invention, as described above, the horizontal T-shaped structure in which the beam member is horizontally and integrally projected from the intermediate portion of the column member, and prestress is introduced into the column member and the beam member. The precast concrete members are arranged at both ends in the span direction, and the both ends of the intermediate steel beam are joined to the respective beam members facing each other in the same horizontal T-shaped precast concrete member,
A composite building structure comprising a precast concrete member and a steel aggregate, which is a conventional steel structure,
Since a span longer than that of the prestressed concrete structure is obtained and a steel beam is used in the middle of the beam, prestress is introduced into the beam member of the horizontal T-shaped precast concrete member which is the beam end. Together, the beam formation becomes smaller, and the use of intermediate steel beams reduces the weight of the structure.

Furthermore, since the pre-stress is introduced into the horizontal T-shaped precast concrete member, cracks, flexure and vibration damage of the concrete skeleton of the member can be prevented.

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

As shown in FIG. 2, the structure of the structure of the present invention has seismic walls (A) provided on the end sides of the building in the span direction,
The girder direction has a rigid frame structure, and the present invention has a point in the structure in the span direction, and since no seismic element is used in the structure itself, the load of seismic force is small and only the load in the vertical direction is loaded. is there.

(B) is a horizontal T-shaped precast concrete member, in which the precast concrete beam member (2) is integrated from the middle part of the precast concrete column member (1) configured to introduce prestress during site construction. The beam member (2) is pre-stressed at the time of manufacturing in the factory.

In the figure, (3) is a PC steel material embedded in a sheath embedded in the beam member (2), and (4) and (5) are a fixing hardware and a tension end anchor head of the PC steel material (3). (6) is a shear connector.

Reference numeral (7) is a steel beam for joining fixed to the end of the beam member (2), and reference numeral (8) is a steel column connecting piece fixed to the end of the column member (1).

(C) is an intermediate steel beam, with P at the lower end along the longitudinal direction.
The C steel material (9) is disposed, and the PC steel material (9) is tensioned to fix both ends to the fixing tool (10) disposed on the intermediate steel beam (C). ), Pre-stress is introduced, and the same beam (C) is directed upward and curved so as to bulge,
The bending is reduced with respect to the vertical load, and the stress is brought into an advantageous state.

Then, the horizontal T-shaped precast concrete member (B) is installed at a predetermined position, and the pillar member (1) of the member (B) is a lower horizontal T-shaped member.
After connecting to the pillar member (1) of the precast concrete member (B), the PC steel material (9) of the upper pillar member (1) is coupled to the PC steel material (9) of the lower pillar member (1). Connection is made via (12), and joint concrete (13) is placed between the pillar members (1), (1). Then, the PC steel material (9) is tensioned to introduce prestress to the column member (1).

In the figure, (14) is a PC steel fixing portion.

Next, the intermediate steel beam (C) is connected between the opposing beam members (2) and (2) of the horizontal T-shaped precast concrete members (B) arranged at both ends in the span direction.

Reference numeral (15) in the figure is an attachment plate for joining the intermediate steel beam (C) and the joining steel beam (7) of the beam member (2).

In this way, the middle steel beam (C) is joined to the beam member (2) of the transverse T-shaped precast concrete member (B), and at the same time, the steel girder beam (D) is attached to the column member (1) of the member (B). After joining, an omnier plate (E) is mounted on each beam, and floor concrete (F) is poured.

In the figure, (G) is a lower structure, (16) is a beam main bar of the beam member (2), and (17) is an auxiliary bar.

The pillar member (1) of the horizontal T-shaped precast concrete member (B) is installed at a point at an inflection point where the bending moment is small with respect to the seismic force, which is located at about half the floor height. The beam member (2) and the intermediate steel beam (C) are connected to each other at a position 1/4 of the beam span from the beam end where the bending moment is small against the vertical load.

(Effects of the Invention) According to the present invention, as described above, the lateral T formed by integrally projecting the beam member horizontally from the middle portion of the column member and introducing prestress to the column member and the beam member. Type precast concrete members are arranged at both ends in the span direction, and both ends of the intermediate steel beam are joined between the beam members in the same horizontal T-shaped precast concrete members, so that a long span structure is formed. The effective use area of the building is greatly increased.

Further, prestress is introduced into the beam member of the horizontal T-shaped precast concrete member that constitutes the beam end portion of the above structure,
Since the middle part of the beam is composed of steel beams, the beam formation can be reduced, the floor height of the building can be lowered, and conversely the number of floors of the entire building can be increased. The use of steel beams can reduce the weight of the structure. As a result, the structural cost of the building can be significantly reduced.

Further, according to the present invention, the pre-stress is introduced into the horizontal T-type precast concrete member, so that the concrete skeleton of the member can be prevented from cracking, bending, and vibration.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the structure of a composite building structure according to the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are views III-III of FIG. 1, respectively. It is an arrow IV-IV figure similarly. (B) …… Horizontal T-shaped precast concrete member, (C) …… Intermediate steel beam, (1) …… Column member, (2) …… Beam member, (3) …… PC steel material, (9)… … PC steel.

Claims (1)

[Claims] 1. A horizontal T-shaped precast concrete member formed by horizontally projecting a beam member integrally from an intermediate portion of the column member and introducing prestress to the column member and the beam member at both ends in the span direction. A structure of a composite building structure, characterized in that both ends of an intermediate steel beam are joined to the beam members facing each other in the same pair of horizontal T-shaped precast concrete members.