JPH0326746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reinforced concrete structure building that allows a wide effective floor area.

(Prior art) In general, the stress applied to columns increases as the building becomes taller, but in high-rise buildings, compressive and tensile stress applied to external columns located on the outside of the building due to lateral forces caused by earthquakes, etc. It tends to be larger than the one attached to the central pillar located on the inside of the building. For this reason, in conventional buildings with reinforced concrete structures, the strength of outer columns, which are subject to greater stress than the inner columns, was increased by increasing the number of reinforcing bars in the outer columns.

(Problems to be Solved by the Invention) However, increasing the number of reinforcing bars in the outer columns causes an increase in the cross section of the outer columns, which reduces the effective floor area for the entire building and impairs the freedom of plan planning.

(Means for Solving the Problems) In the present invention, the columns and beams 4 have a reinforced concrete structure, but the outer columns 2, 12, and 22 located on the outer side of the building 1 are made of steel at their axis. By burying the core members 2b, 2c, and 2d, the core members 2b, 2c, and 2d are intended to bear a larger stress than the center pillar 3 located inside the building. The outer column and the middle column have the same column cross section. An external pillar located on the outside of a building means the pillar closest to the outside in a normal building, but depending on the type of building, it may include both the pillar closest to the outside and the pillar located near this pillar. This includes: Note that the outer surface of the building 1 also includes the surface facing the atrium in a building having an atrium.

(Example) Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, a high-rise building 1 having a reinforced concrete structure has an L-shaped planar shape. Of the pillars of this building, the outer pillars 2 facing the outer wall of the building are shown as squares, and the middle pillars 3 located on the inside of the building are shown as dots.

The outer column 2 has reinforcing bars 2 inside as shown in Fig. 2A.
It has a reinforced concrete structure with reinforcement a, and a core steel frame 2b of H material steel, which is a core material for improving strength, is embedded in the shaft center. In addition, the middle column 3 is a reinforced concrete structure column with reinforcing bars 3a arranged inside as shown in Fig. 3, and the column cross section is the same as the column cross section of the outer column 2 (see Fig. 2A). There is no core material in the part.

In Figure 2A, 4 is a reinforced concrete structural beam.

To explain the construction of outer pillar 2, first
A core steel frame 2b is erected at a position corresponding to the axial center of the structure, reinforcing bars 2a are then arranged, a formwork is assembled, and then cast-in-place concrete is poured.
Outer column 2 is a PC column (precast concrete column)
In this case, the columns on the upper and lower floors will be sequentially joined using joint members.

The core material of the outer column may be, for example, a steel pipe, or may be a steel pipe 2c filled with concrete, such as high-strength concrete _2c1 , as shown in FIG. 2B. Further, as a core material, a spiral reinforcing bar 2d ₁ may be wound around a core reinforcing bar 2d arranged in a rectangular shape as shown in FIG. 2C.

In addition to the building shown in FIG. 1, the present invention can also be applied to buildings 1a and 1b having a rectangular or Y-shaped planar shape as shown in FIGS. 4 and 5, for example. Further, in a building 1c having an atrium 5 as shown in FIG. 6, the pillars 12 on the outer side facing the atrium may also be external pillars. Of course, the pillar 12 may have the same configuration as the middle pillar 3. Furthermore, building 1 shown in Figure 7
In d, the pillar 22 located inside the outermost pillar 2 may be used as the outer pillar.

(Effects of the Invention) As explained above, according to the present invention, the core material of the outer column bears stress greater than that of the middle column, so the strength is improved without increasing the cross section of the outer column. As a result, the floor space for building use can be increased, flexibility in plan planning is increased, and the toughness of the building itself is higher than that of conventional reinforced concrete buildings.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the plan shape of the building, Figure 2A
The figure is a cross-sectional view of the outer column, Figures 2B and 2C are cross-sectional views showing other embodiments of the outer column, Figure 3 is a cross-sectional view of the inner column, and Figures 4 and 5 are cross-sectional views of the inner column. Explanatory drawings showing other examples of plan shapes of buildings, No. 6
The figure is an explanatory diagram showing the planar shape of a building having an atrium, and FIG. 7 is an explanatory diagram showing another example of the arrangement of external pillars. 1, 1a, 1b, 1c, 1d... Building, 2, 1
2, 22...Outer pillar, 2b, 2c, 2c ₁ , 2d, 2
d ₁ ... Core material, 3... Middle pillar.

Claims (1)

[Claims] 1. A reinforced concrete structure in which the pillars of a building are composed of an external pillar located on the outside of the building and a central pillar located inside the building, and the external pillar and central pillar have the same column cross section. 1. A building of reinforced concrete structure, characterized in that only the outer column has a core material embedded in its axial center to improve its strength.