JPS63201224A - Structure of high building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a high-rise building that enables economical structural design without special reinforcement by adopting a rational structural method. It's about structure.

(Prior Art) FIG. 5 is a conceptual diagram showing the structural mechanical stress distribution of a conventional high-rise building.

In Fig. 4, if only the vertical force as a long-term load is acting, then the axial force (compression force) is added.

Next, for example, assuming that a wind pressure W as a horizontal force acts on the building 1 from the right direction in Figure 4, the stress distribution of each company 2 in response to only the horizontal force is as shown in Figure 5 (
As shown in b), a tensile force acts on the column 2 on the right side of FIG. 4, while a compressive force acts on the column 2 on the left half.

Therefore, in a high-rise building according to this conventional example, where the stress during horizontal force is relatively large compared to the vertical force as the long-term load, the stress occurring in each company 2 is actually , and the vertical force, the resultant stress distribution is as shown in FIG. 5(C), and the tensile force acts as a governing load on the column 2 at the right end in the figure.

In other words, a problem has arisen in that columns, which should originally be designed assuming external forces other than tensile force, must also take tensile force into consideration.

Therefore, conventionally, as shown in Fig. 6, the above-mentioned tensile force is taken into consideration in advance at the design stage, and a so-called axis is placed at the center of the concrete 3 in the cross section of the column 2 so that the concrete does not have to bear the tensile force. A design in which a tensile force resisting member such as a steel pipe is buried as the reinforcing bar 4, or a predetermined prestress is applied to the column main reinforcing bar 5 to cope with the tensile force has been adopted.

(Problems to be Solved by the Invention) However, in such a conventional example, extra work such as adding the shaft reinforcement 4 and applying prestress to the column main reinforcement 5 is required, making the construction work complicated. ,
There were also problems from an economical design perspective.

The present invention was developed in view of such conventional problems, and it is possible to rationally design the structure of a building by planning the structure in advance so that there are no columns on which tensile force acts at the design stage. The purpose is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, in the structure of the building according to the present invention, the structure of the building is designed so that the burden of axial force at the time of horizontal force is reduced at the outer peripheral edge of the building. It is characterized in that the rigidity of the beam at the outer peripheral end is lowered by a predetermined amount than the inside.

(Function) In the present invention having the above configuration, by reducing the stiffness of the beam that transmits horizontal force by the outer peripheral part in advance at the outer peripheral end of a high-rise building, it is possible to The structure is designed so that the burden of the axial force transmitted to the column at the outer peripheral end is reduced compared to other parts, and as a result, no tensile force is applied to the column near the outer peripheral end.

It is possible to become

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of the present invention, and FIG. 1 shows a conceptual plan view of a specific layer of a high-rise building 10. FIG.

The high-rise building 10 is designed in such a way that six beams 11 are arranged in a grid pattern, and each company 12 is placed at the intersection of the beams 11.

Here, if the cross-sectional performance of the beam 11 is the same throughout the length direction, the area 12a at the outer peripheral end bears the vertical force is about half that of the area 12b at the center, and on the other hand, When a horizontal force is applied, the axial force due to only the horizontal force is greatest at the outer peripheral end of the column 12a.

Therefore, in this embodiment, as shown in FIG. 2, taking a particular beam 11 as an example, the cross-sectional performance of the beam is reduced only at the outer circumferential ends 11a on both sides, and the beam rigidity at both ends is reduced. The structure is such that the distance is lowered by a predetermined amount than in the central portion.

Therefore, since the horizontal structural surface composed of the six beams 11 integrated in a lattice shape has reduced rigidity only at the outer peripheral edge, when wind pressure or earthquake force acts as a horizontal force, the horizontal force is not transmitted equally to each company 12 as in the past, and the axial force borne by the pillars 12a at the outer peripheral end is equal to the decrease in beam rigidity in that part, as described above, compared to the other internal pillars 12b. This means that you will only need less.

That is, as shown in FIG. 3(b), the stress distribution of each company 12 in response to only the horizontal force is different from the stress distribution of the conventional example shown in the corresponding diagram.
This means that the other internal companies 12b bear more of the burden of the reduced axial force.

Therefore, the composite stress distribution with the vertical force as a long-term load is:
As shown in FIG. 3(C), all the columns 12 are on the compression side, and the columns have internal reinforcing bars as in the conventional example, or
The work of introducing prestress is completely unnecessary.

The stress distribution shown in Figure 3(b) is an example when a horizontal force is applied from the right direction in Figure 1, but as mentioned above, in this example, the stiffness of all the beams on the outer periphery is reduced. Since it is symmetrical, the same effect can be achieved against horizontal force from any direction.

(Effects of the Invention) The present invention is configured as described above, and in order to reduce the burden of axial force during horizontal force at the outer peripheral end of the building, the rigidity of the beam at the outer peripheral end is lower than that inside the building. By adopting a rational structure method that reduces only a quantitative amount,
Eliminates the possibility that tensile force becomes a dominant load on a specific column without special reinforcement of the column itself as in the conventional case,
Economical structural design becomes possible.

In addition, the cross-sectional configurations of each company may be the same, which is preferable in terms of workability.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is a conceptual plan view of a specific layer of a high-rise building according to this embodiment, and FIG. 2 is a conceptual diagram showing the configuration of a specific beam. 3(a) to 3(C) are explanatory diagrams showing the stress distribution of columns, FIG. 4 is a schematic elevational view of a conventional high-rise building, and FIG. 5 (
a) to (c) are stress distribution diagrams of each company, and FIG. 6 is a schematic cross-sectional view of a conventional column. 1.10-...high-rise building, 2.12-...column, 3...
- Concrete, 4... Axial reinforcement, 5... Column main reinforcement, 11-... Beam, 11a-... Beam at outer peripheral end. 1 l b--Internal beam.

Claims (1)

[Claims] A structure of a high-rise building, characterized in that the rigidity of the beam at the outer peripheral end of the building is lowered by a predetermined amount than the inside so that the burden of axial force during horizontal force is reduced at the outer peripheral end of the building.