JPH06306952A - Frame for multistoried building - Google Patents

Abstract

PURPOSE:To increase shared shearing force, to ensure the strength and tenacity of a boundary and to economize wall thickness and the arrangement of reinforcements by splicing a center core and an outer circumferential frame by beams made of steel frames and arranging X-shaped reinforcements to the RC-made short beams of an outer circumferential frame and short beams among mutual center core walls. CONSTITUTION:Center cores B having wall structure and outer circumferential frames A having tube structure are spliced by long-sized steel framed beams 3. Each span ratio of RC-made short beams 2 for the outer circumferential frames A to short beams 4 among mutual center core walls is reduced. Consequently, since shear fracture and shear adhesive fracture are easy to be generated, X-shaped reinforcements 5 are arranged to the beams of the section, thus ensuring strength and rigidity. Fixing end sections are bent, and a plurality of X-shaped reinforcements 5 are bundled by constraint reinforcements 7, and buried to a center wall 10 in the X-shaped reinforcements 5 of the short beams among mutual center cores, thus housing the shape and length of the fixing sections in small size. Accordingly, the shared shearing force of the outer circumferential frames A is increased, and the shared shearing force of the center cores B is lightened, thus reducing wall thickness and the quantity of the reinforcements arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a high-rise building having a mixed structure.

[0002]

2. Description of the Related Art Recent mixed structures include a reinforced concrete structure and a steel frame structure in a planar structure level. In this type of mixed structure, the center core is made of reinforced concrete,
The outer frame is often made of steel.

[0003]

In this type of mixed structure, most of the horizontal force must be borne by the center core, and the wall thickness and reinforcement of the center core become excessive. The present invention has been proposed in view of the above problems of the prior art, and an object of the present invention is to increase the shearing force to be applied to the outer peripheral frame to increase the strength and toughness of the outer peripheral frame beam and the boundary beam of the center core. This is to provide a frame structure for high-rise buildings in which the center core wall thickness and bar arrangement are reduced.

[0004]

In order to achieve the above object, the frame structure of a high-rise building according to the present invention comprises an outer frame of a tube structure made of RC columns and beams and a center core of a wall structure. A mixed structure in which a beam connecting the center core and the outer peripheral frame is made of steel, and an X-shaped bar is arranged on the RC short beam of the outer peripheral frame and the short beam between the center core walls. Is configured.

According to a second aspect of the present invention, a plurality of bent X-shaped bar arrangements are bundled by restraint bars and arranged on the short beams between the center core walls.

[0006]

According to the present invention, the outer peripheral frame is also composed of RC columns and beams, and has a frame tube structure of a short span frame in order to increase the shearing force that the outer peripheral frame bears. In this way, the horizontal force of the center core is reduced to reduce the wall thickness of the center core and the amount of reinforcement.

Thus, both the outer peripheral frame beam of the frame tube structure of the short span frame structure and the center core boundary beam have a small shear span ratio, toughness is lowered, brittle fracture is likely to occur, and shear fracture and shear adhesion occur. Since breakage easily occurs, X-shaped reinforcements are arranged on the RC short beams of the outer peripheral frame and the short beams between the center core walls to improve the strength and toughness of the beams.

Although the X-shaped reinforcement is effective for securing the strength and rigidity of the short span beam, the conventional anchor for the wall of the X-shaped reinforcement fixes the X-shaped reinforcement linearly. Therefore, the reinforcement work efficiency is poor, such as the reinforcement of the horizontal reinforcement of the wall. However, according to the present invention, the strength and toughness of the beam can be improved by bundling a plurality of bending X-shaped reinforcements with restraint reinforcements. In addition, since the fixing end of the X-shaped bar is bent, the length and length of the fixing portion can be reduced.

[0009]

The present invention will be described below with reference to the illustrated embodiments. A is an outer frame of a tube structure composed of RC columns 1 and RC short beams 2, B is a center core of a wall structure, and the center core B and the outer frame A are connected by a long steel beam 3. There is.

Since the shear span ratio of each of the RC short beam 2 of the outer peripheral frame A and the short beam 4 between the center core walls becomes small and shear fracture and shear adhesion fracture easily occur, the beam in this portion is The X-shaped bar 5 is arranged to secure strength and rigidity. In the figure, 6 is an opening. The X-shaped bar arrangement 5 of the short beam between the center cores is formed by bending the fixing end portion, and the plurality of X-shaped bar arrangements 5 configured in this way are bundled by the restraining bar 7 to form the center core wall 10. By embedding it, the length and length of the fixing part can be reduced.

In the figure, reference numeral 8 is a horizontal auxiliary muscle for receiving the costal muscle 9, and the parallel muscle portion is an auxiliary muscle for receiving the costal muscle, and need not be anchored to the wall column. 5 (a) and 5 (b) show a case in which the beam width is small and a case in which the beam width is large in the arrow aa view of FIG. 4, respectively. According to the present embodiment, as described above, by arranging the plurality of loop-shaped X-shaped bar arrangements 5 by binding them with the restraint bar 7, the strength and toughness of the beam can be improved.

FIG. 6 shows a conventional X-shaped straight bar anchor 15.
An example of bar arrangement is shown below. Since the anchors are directly anchored in the wall pillar, the length and length of the anchoring part are increased, and the bar arrangement of the horizontal bar of the wall is poor and the bar arrangement is inefficient.

[0013]

As described above, according to the present invention, the outer peripheral frame has a tube structure of a short span frame composed of RC columns and beams, the center core has a wall structure, and the center core and the outer peripheral frame are steel frame beams. By adopting the mixed structure to connect, the shearing force of the outer frame is increased to reduce the shearing force of the center core, and the wall thickness and the amount of reinforcement are reduced.

Further, since the shear span ratio of the center core boundary beam and the outer peripheral frame beam becomes small and shear fracture and shear adhesion fracture are likely to occur, the strength and toughness are secured by arranging the X-shaped reinforcement in this portion. To do. According to the invention of claim 2, by arranging a plurality of bent X-shaped reinforcing bars bundled with restraint bars on the short beams between the center cores, the strength and toughness of the beams are improved, and X-shaped bars are provided. The construction efficiency of can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a frame structure of a high-rise building according to the present invention.

FIG. 2 is a partial front view of FIG.

FIG. 3 is a partial side view of FIG.

FIG. 4 is a cross-sectional view showing an arrangement portion of X-shaped bar arrangements for short beams.

5 (a) and (b) are views taken along line aa of FIG. 4, respectively.
(A) shows the case where the beam width is small, and (b) shows the case where the beam width is large.

FIG. 6 is a cross-sectional view showing an example of a conventional X-shaped muscle arrangement.

[Explanation of symbols]

 A Outer frame B Center core 1 RC columns 2 RC short beams 3 Steel beams 4 Center beams Short beams between walls 5 X-shaped bar arrangement 6 Opening 7 Restraint bars 8 Horizontal auxiliary bars 9 Rib bars 15 X-shaped bar Straight anchor 10 Center core wall

Claims (2)

[Claims] 1. A mixed structure comprising an outer frame of a tube structure made of RC column beams and a center core of a wall structure, and a beam connecting the center core and the outer frame having a steel frame structure, A frame of a high-rise building, wherein X-shaped reinforcements are arranged on the RC short beams of the outer peripheral frame and the short beams between the center core walls. 2. The frame structure for a high-rise building according to claim 1, wherein a plurality of bent X-shaped reinforcing bars are arranged on the short beams between the center core walls by binding them with restraint bars.