JPH047790B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a high-rise building having a high-rise section having a void in the center above the low-rise section;
In particular, the present invention relates to a frame structure of a high-rise building having a duct floor forming a ventilation path from the outside of the building toward the bottom of a void.

[Prior art] For large buildings, plan view a and cross-sectional view b in Figure 2 are used.
As shown in FIG. 1, a space 2 is provided at the center of a building 1 for daylighting, and this space is called a void or light garden. Such a high-rise building 1 is composed of a low-rise part 3 and a high-rise part 4, and the high-rise part has a large number of standard floors 5 and constitutes a frame with columns 6 and beams 7. The central void 2 of the high-rise section 4 is designed to provide ventilation (arrow) from the outside of the building to the inside.
It promotes ventilation as well as lighting. For this ventilation, it is necessary to provide the duct floor 8 on the lowest floor of the high-rise building, but in order for the draft of the void section 2 to work effectively, the floor height D, which determines the effective opening of the duct floor 8, is comparatively It's good to have a small target. From a structural point of view, this small floor height is unbalanced with respect to the overall structure, so conventionally in such buildings, the duct floor height was 8.
Make the floor height D the same as the standard floor 5, or make the pillar 6 at the duct floor 8 part without changing the floor height.
It increases the resistance to stress concentration. Note that 5A in the figure is a corner portion of the standard floor 5.

[Problems to be Solved by the Invention] When the height of the duct floor 8 is the minimum dimension for an opening in the design, the column becomes a so-called short column, and the rigidity of this floor is equal to the rigidity of the standard floor 5. Becomes higher. If the stiffness distribution in the height direction becomes uneven, the column is likely to undergo brittle fracture. Reinforcement for this purpose not only increases cost, but also increases rigidity, which can lead to a vicious cycle. On the other hand, the floor height of duct floor 8 is the standard floor 5.
If it is the same, the balance of rigidity will be maintained, but of course it will affect the construction cost and the height of the building. As described above, the conventional method of installing duct floors cannot be said to be rational, and countermeasures have been desired.

[Means for Solving the Problems] In view of the above-mentioned current situation, the present invention was developed as a result of intensive research with the aim of solving the problem. In a high-rise building, a void is formed in the center by the frame on the outer periphery, and a floor is provided at the bottom with a duct that connects from the outside of the building to the void for ventilation. , the ventilation floor where the duct is installed is the duct floor installed in the lower part,
It consists of a standard floor for the upper part of the upper part, and the total floor height is set almost equal to the floor height of the lower part in order to balance the rigidity.
The beams in this area should be erected only in one direction in the ventilation direction, not as part of the main frame of the entire building, but as middle beams to support the floor slabs of the high-rise standard floors in this area. The gist is: The middle beam may be simply supported at the intermediate height of the column, and the floor slab may also be supported by unidirectional reinforcement.

As a result, there is no need to include beams in the floor height of the duct floor, and the floor height of the ventilation floor, including the duct floor, is equivalent to the floor height of the lower part 3, which solves the problem with the frame structure. and can often achieve the intended purpose.

[Example] The configuration of the present invention will be explained in detail based on the drawings of the example. FIG. 1 is a cross-sectional view of a main part of a high-rise building 1 having a duct floor according to the present invention, which has a configuration similar to that of the example shown in FIG. The high-rise section 4 is constructed above the low-rise section 3 as a two-story structure, and in this example, the high-rise section 4 is smaller than the low-rise section 3, but of course they may be of similar size. 3 corresponding to the lowest part of high-rise part 4
The floor is indicated by a ventilation floor 10, which consists of a duct floor 8 below and a reference floor 5 (third floor) above it.
The floor height K of the ventilation floor 10 is divided into a lower floor height D and an upper floor height H (2.9 m), and the sum of these is set to be approximately the same as the floor height of the second floor.
It is 4.6m. Reference numeral 11 is a column for the ventilation floor 10 and is continuous with the columns 6 above and below. A bracket-shaped support part 12 is provided at the middle height of this column in the direction between the beams in the ventilation direction, and a precast middle beam 13 is supported and constructed on the upper surface of this support part 12. The floor slab of this floor supported by this middle beam 13 is different from the floor slab 9 of the standard floor, and is supported by two middle beams 13.
This slab 14 is supported by
For example, like "omniya board", two beams 1
Use one that is reinforced with reinforcement in one direction in the interval direction of 3. In addition, 9A indicates a balcony provided on the outer periphery of the high-rise section 4 or an external corridor provided on the void side, and in the case of the ventilation floor 10, it is a slab 9B supported by a cantilever beam 15 protruding from the pillar 11. Like the slab 14, it has one-way reinforcement. Ventilation floor 10 at corner 5A of standard floor 5
However, the structure of the frame should be the same as above, and whether a middle floor is provided or not, the method should be consistent throughout the building.

[Function] The function of the high-rise building of the present invention will be explained in detail from the viewpoint of its construction. The construction up to the lower part 3 is the same as usual. The frame of the high-rise section 4 is composed of columns 11 and upper beams 7, but in constructing the columns 11, the middle column is provided with support sections 12 on both sides, and the side columns are provided with support sections 12 and 7. A cantilever beam 15 is provided. On the other hand, the middle beam 13 and the slab 14 are manufactured separately as precast concrete products, and after the concrete is removed from the mold for constructing the column, the middle beam 13 is erected on the upper surface of the support base 12, and then the middle beam 13 is
Slabs 14 are successively installed on the upper surface of the . Middle beam 1
3 is fixed with both ends simply supported, and the slab 14
is erected with two-side support or peripheral support. Therefore, the duct floor 8 and standard floor 5 formed here have no direct structural influence on the basic frame of columns and beams, and the building 1 has no direct structural influence on the rigidity of the frame or the floor height on the ventilation floor 10. Does not cause sudden changes. Since this frame does not have beams supporting the slabs 14 in the column direction of the columns 11, the effective opening height h for ventilation of the duct floor 8 is almost all effective for the floor height D. So, for the floor height K of the ventilation floor 10,
Approximately 1.5m can be secured even if standard floor 5 is installed.

[Effects of the Invention] As described above, in the present invention, the ventilation floor in which the duct is provided at the lowest part of the high-rise section is composed of the duct floor provided in the lower part and the high-rise reference floor provided in the upper part. At the same time, the total floor height is set to be approximately equal to the floor height of the lower-rise section in order to balance the rigidity. Therefore, the middle beam installed in this area is a support that does not affect the main frame of the entire building. Because of this structure, we succeeded in constructing an extremely effective duct floor due to the above-mentioned effects. Moreover, since there is no support beam on the upper floor, the effective opening of the duct floor can be made almost equal to the floor height of the duct floor.
The floor height of the building can be reduced accordingly.
Furthermore, the height of the ventilation floors does not create an imbalance in the rigidity of the building, and the basic frame structure can be constructed smoothly. Furthermore, the prefabricated construction method using precast concrete can be used for intermediate-stage structures, which has great benefits in terms of the process.

[Brief explanation of drawings]

The drawings show an example of a high-rise building with duct floors, and Figure 1 is a detailed view of the main parts, Figure 2
Figures A and B show a plan view and a frame sectional view of a high-rise building, respectively. 1...Building, 2...Space, void, 3...
...low-rise section, 4...high-rise section, 5...standard floor, 6...
Column, 7...beam, 8...duct section, 9...floor slab, 9
B... Balcony slab, 10... Ventilation floor, 1
1...Column of ventilation floor, 12...Support part, 13...
Middle beam, 14...slab, 15...cantilever beam, h...
...Effective opening height, D...Duct story height, H...Standard story height, K...Ventilation story height.

Claims (1)

[Claims] 1. Consisting of a low-rise part and a high-rise part, in the high-rise part, a void part is formed in the center by a frame on the outer periphery, and at the bottom of the void part, there is a passageway from the outside of the building toward the void part. In a high-rise building in which ventilation is achieved by providing floors with connecting ducts, the ventilation floor provided with the ducts consists of a duct floor provided in the lower part and a high-rise reference floor provided in the upper part, and The total floor height is set to be approximately equal to the floor height of the lower floor, and this floor is divided into upper and lower halves, and the beams of the duct floors that support the floor slabs of the standard floors of the upper floors are installed as pillars only in the ventilation direction. A high-rise building having a ducted floor. 2. The beam of the duct floor that supports the floor slab of the high-rise standard floor is a middle beam that is simply supported on a support base provided on a column. High-rise buildings with duct floors.