JP3783132B2 - Building structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure suitable for application to a building such as an office building.
[0002]
[Prior art]
As is well known, a ramen structure is the most common building structure, but in the conventional general ramen structure, many pillars are provided inside the building, and there are many restrictions on the structure plan, so design freedom The degree is not necessarily high. Therefore, when planning an office building with a normal ramen structure, it is not always possible to secure a sufficient effective area, and the variability and renewability of the floor plan is not sufficient, especially for rental office buildings. However, there is a limit in terms of business and profitability because there is a case that a sufficient rentable ratio cannot be secured or a tenant's request cannot be fully met.
[0003]
[Problems to be solved by the invention]
In view of the above circumstances, an object of the present invention is to provide a more rational and effective building structure that can be replaced by a conventional general ramen structure, particularly a building structure suitable for application to a rental office building.
[0004]
[Means for Solving the Problems]
In the structure of the building of the invention of claim 1, the seismic load is mainly concentrated on the cage structure formed by densely arranging the outer peripheral columns, and the vertical load is mainly applied to a small number of large black columns provided in the substantially central portion inside. The cage structure is composed of a main column and a seismic isolation column with a smaller cross section than that, and the large and small beams are directly crossed and rigidly joined to form a lattice beam. A large black pillar intensively bears the vertical load of the entire building .
[0007]
A second aspect of the present invention, in the structure of the building according to claim 1, wherein the invention is characterized in that distributed a plurality of core portions outside the outer periphery of the main body portion of the shaping.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The building of the illustrated embodiment is a rental office building, and the floor plan of the reference floor is in a form in which three core parts 2 are dispersedly arranged on the outer peripheral part of the shaping main body part 1, thereby substantially The entire trapezoidal site is fully utilized. The entire body 1 is leased as an effective area, and the core 2 is provided with stairs, elevators, toilets, kettle rooms, etc., and the rentable ratio of each floor is sufficiently secured. . Reference numeral 3 denotes an incidental building such as tower parking provided so as to be continuous with the core portion 2.
[0009]
The structure of the building of this embodiment is based on a steel structure. In particular, the structure of the main body 1 is mainly composed of an outer cage structure 4 and an internal large black pillar 5.
[0010]
The cage structure 4 is like a cage (birdcage) in which a large number of outer peripheral columns 6 are densely arranged, and this cage structure 4 is excellent in concentrating the seismic load acting on the entire building. It has high seismic performance. In the outer peripheral column 6 constituting the cage structure 4, the main column 6a and the earthquake-resistant inter-column 6b having a smaller cross section are provided almost alternately, and the main column 6a and the earthquake-resistant inter-column 6b distribute the seismic load. It is a burden. Although not shown, it is optional to provide a design stud between the main pillar 6a and the earthquake-resistant stud 6b in accordance with the facade. It is also possible to configure the cage structure 4 with only the main pillar 6a by omitting the seismic resistant pillar 6b.
[0011]
The large black pillars 5 are provided at substantially the central part of the main body 1, and these two large black pillars 5 intensively bear the vertical load of the entire building via the large beams 7 on each floor.
[0012]
Furthermore, the vertical and horizontal large beams 7 provided on each floor are directly crossed and rigidly connected, so that the large beams 7 constitute a lattice beam 8 as a whole, and the lattice beams 8 provide sufficient floor rigidity on each floor. To ensure excellent floor vibration characteristics. In addition, you may provide a small beam suitably as needed.
[0013]
The scale and form of the building of this embodiment, the cross section of each structural member, etc. may be designed as appropriate, but the illustrated example is 8 stories above the ground (standard floor height 3.85 m) and the area of the main body 1 is 48 m × As one design example in the case of having an area of 32 m, the main column 6 a constituting the cage structure 4 is a 350 mm × 700 mm steel box column, and a 400 mm × 400 mm H-shaped steel is also used as the seismic resistant column 6 b. Although it is employed, it is conceivable to design the main column 6a as the seismic resistant column 6b. The two large black pillars 5 are 700 mm × 700 mm steel box pillars, and the vertical and horizontal large beams 7 are 800 mm × 300 mm H-section steel. The core part 2 may be a normal steel structure.
[0014]
In the building having the structure according to the present embodiment, the core portion 2 is distributed in the outer peripheral portion of the main body portion 1 without being provided in the main body portion 1, so that the core portion 2 is arranged in an optimum position according to the shape of the site. It is possible to secure the maximum amount of the shaped main body 1 while effectively utilizing the irregularly shaped site, so that the rentable ratio can be improved, and maintenance and updating of the core 2 can be easily performed without affecting the main body 1. It is possible.
[0015]
In addition, since the earthquake load is concentrated on the cage structure 4 and the vertical load is concentrated on the large black pillar 5, it is structurally clear and rational, and the vertical load is applied with a small number of large black pillars 5. Since it is possible to bear the load, the internal space of the main body 1 can be secured as a large space close to a pillarless space. Moreover, since the main body 1 is shaped and does not have the core 2 as described above, the main body 1 is very easy to use, and the whole can be used as a large space as it is. It is also possible to use partitioning walls at any position and freely partition them, so that it can meet a wide range of tenant demands, and it is possible to secure a sufficient rentable ratio. Building can be realized.
[0016]
Furthermore, since the vertical and horizontal large beams 7 provided on each floor are directly crossed and rigidly joined to form the lattice beam 8, the floor rigidity can be sufficiently secured with a small number of large beams 7 in spite of a large space. Floor vibration can also be sufficiently suppressed. According to the simulation of floor vibration in the case of the above design example, the displacement amplitude is about 20 μm at the maximum and the acceleration amplitude is about 2 cm / s ^{2 at the} maximum.
[0017]
The above embodiment is merely an example, and the present invention is not limited to the above embodiment, and various changes and applications are possible. For example, although the said embodiment is an example at the time of applying to a rental office building (tenant building), the use of a building is arbitrary and a scale and a form are not limited at all. Of course, the main body 1 is not limited to a rectangle, but may be a square or a circle, and the core 2 is not limited to three locations, but is appropriately arranged depending on the shape of the main body 1 and the site and other conditions. Just do it. In the above embodiment, the two large black pillars 5 are provided. However, the large black pillars 5 may be optimally arranged according to the form and scale of the main body 1, and only one or three or more may be used. However, it is needless to say that providing a large number of large black pillars 5 throughout the interior is not only meaningful but also meaningless. In addition, it is realistic and preferable that the basic structural form of the entire building is a steel structure, but it is not limited to this, and it can be a reinforced concrete structure, a steel reinforced concrete structure, or any other structure. In particular, as the large black pillar 5 and the outer peripheral pillar 6 (the main pillar 6a and the seismic isolation pillar 6b), it is also preferable to employ a pillar of a filled steel pipe concrete structure in which concrete is filled in the steel pipe.
[0018]
【The invention's effect】
According to the first aspect of the present invention, the seismic load is mainly concentrated and burdened on the cage structure formed by densely arranging the outer peripheral columns, and the vertical load is mainly concentrated and burdened on a small number of large black columns provided in the substantially central portion inside. Since it is structural, it is structurally clear and rational, and only a small number of large black pillars are provided inside, so it is possible to secure a large space with excellent usability, especially in tenant buildings. Best to apply.
[0019]
In addition, since the cage structure is composed of a main pillar and a seismic stud with a smaller cross section than that, the seismic load is distributed and borne by the main pillar and the seismic stud, and excellent seismic performance can be obtained. Obtainable.
[0020]
Furthermore, the vertical and horizontal large beams are directly crossed and rigidly joined to form a lattice beam, and the large black pillars intensively bear the vertical load of the entire building through the lattice beam, thus ensuring a large space. Nevertheless, floor rigidity can be sufficiently secured with a small number of large beams, and floor vibration can be sufficiently suppressed.
[0021]
In the invention of claim 2, since a plurality of core parts are dispersedly arranged outside the outer peripheral part of the shaping main body part, even if the site is irregularly shaped, the entire site can be used effectively, and the shaping main body part can be used. It can be ensured to the maximum, and maintenance and updating of the core part can be performed independently of the main body part.
[Brief description of the drawings]
FIG. 1 is a plan view of a reference floor showing a structure of a building according to an embodiment of the present invention.
FIG. 2 is a diagram schematically showing the structure of one floor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main-body part 2 Core part 4 Cage structure 5 Large black pillar 6 Peripheral pillar 6a Main pillar 6b Earthquake-resistant pillar 7 Large beam 8 Grid beam

Claims (2)

Concentrate the seismic load on the cage structure with the outer peripheral columns densely arranged,
Concentrate the vertical load mainly on a small number of large black pillars provided in the center of the interior ,
The cage structure is composed of a main pillar and a seismic stud with a smaller cross section ,
A structure of a building characterized in that vertical and horizontal large beams are directly crossed and rigidly joined to form a lattice beam, and the large black pillars intensively bear the vertical load of the entire building via the lattice beam. The building structure according to claim 1 , wherein a plurality of core portions are dispersedly arranged outside the outer peripheral portion of the shaping main body portion.

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