JPH0326257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a building frame structure that is suitable for medium-to-high-rise buildings of a mid-corridor type.

(Prior Art) Many buildings such as hotels have a plan in which rooms with partition walls are lined up along a central hallway.
In many cases, equipment ducts are routed through a horizontal main duct within the ceiling of the central hallway, and each room is serviced from there. In this case, in a conventional structure in which girders are spanned across each span, the ceiling becomes deep due to the arrangement of ducts, etc. under the girders, and the floor height of the frame becomes correspondingly high. However, for example, in hotels in urban areas where land prices are high, if legal height restrictions are imposed, it is necessary to build to the maximum allowable floor area ratio and increase the number of guest rooms as much as possible. Therefore, the challenge is to reduce the floor height and increase it as much as possible.

(Problem to be solved by the invention) In order to solve this problem, there is a method of installing a duct through the beam, but according to this method,
Not only is this unfavorable in terms of structural strength, but it also takes time and effort to construct the beam through it.

An object of the present invention is to solve the problem of floor height and beam penetration in conventional structures.

(Means for Solving the Problems) The present invention is characterized by a building having a plurality of consecutive floors in the form of a central corridor, in which the central corridor on each floor is a flat slab with no beams in the span direction. Small beams are installed in the girder direction between the studs that support the hallway, and the spans on both sides of the middle hallway are ribbed slabs.

Another feature of the present invention is that, in addition to having the features of the above-mentioned invention, earthquake-resistant walls are arranged at the same planar position on each floor equipped with a central hallway, and at the top of each floor equipped with a central hallway. Ceiling beams are installed on the floor where it is located,
This is because the floors located at the bottom have floor beams installed in the span direction.

(Example) An example in which the present invention is applied to a hotel will be described below with reference to the drawings.

The building structure of the hotel in this example is as shown in Fig. 1: upper floor S1, middle floor S2, and lower floor S
Consists of 3.

Therefore, the configuration of the upper floor S1 in the form of a middle corridor, which shows the characteristics of the present invention, will be explained.

Each floor of the upper floor S1 is a guest room, and as shown in FIGS. 1 to 5, the left and right sides of the central corridor C are guest rooms G.

The short-span space in the center, which corresponds to the middle corridor C, is composed of a normal flat slab 1 without a girder in the span direction (left-right direction), and small connecting beams 3 in the girder direction spanning between the studs 2 and 2. be.

In addition, the structure of the large left and right span space corresponding to guest room G is the partition beam shear walls 5 with built-in steel braces 4.
The ceiling and floor of each floor are composed of ribbed slabs 6 without small beams. Rib 6a of slab 6
are arranged at equal intervals in the span direction. The outer wall side is a rigid frame structure consisting of columns 7 and girders 8. A girder 9 is arranged between the pillar 7 and the stud 2.

Among the floors that make up the high floor S1, the ceiling of the highest floor and the floor of the lowest floor are provided with girders 10 in the span direction, as shown in Figure 1. A girder 11 is constructed respectively. Reference numerals 12 and 13 are beams in the column direction of the center span. The high floor S1 in the form of a middle corridor forms a large frame surrounded by ceiling beams 10 and floor beams 11 of large-span partition seismic walls 5 on the left and right sides.

As shown in FIGS. 4 and 5, main ducts 14 and 15 for equipment are passed through the space surrounded by the small beams 3 and 3 below the flat slab 1, and branch ducts 14a and 15a are connected to the small beams from this duct. Each guest room G is led to each guest room G by passing under it. 16 is the ceiling.

Therefore, on each floor that makes up the high-rise floor S1, the section corresponding to the inner hallway of each floor located between the top floor and the bottom floor has no girders in the span direction. You can secure duct space without making the ceiling deep. In addition, in the guest rooms G on the left and right sides of the middle corridor C on each floor of the upper floor S1, ribbed slabs 6 are used for the floor, so despite the large span, by eliminating the small beams, the girder rows can be improved. Since a large beam in the direction is unnecessary and a small connecting beam can be used, branch ducts 14a and 15a leading from the main ducts 14 and 15 to each guest room G can be installed without deepening the ceiling. In addition, high floor S
In 1, braces 4 are placed on the partition walls of the left and right guest rooms G.
A seismic wall 5 with a built-in seismic wall 5 is installed at the same position on each floor, and the ceiling beam 10 on the top floor and the floor beam 11 on the bottom floor are completely spanned in the span direction. The entire floor S1 forms one large frame and resists horizontal forces.

As shown in Fig. 1 and Fig. 6 which is a stress diagram, the middle floor S2 and the lower floor S3 of the building are constructed using ordinary pillars 17
It has a rigid frame structure with beams 18 and 18, and the middle floor S2 is used as a public space P, such as a banquet hall, and the lower floor S3 is used as a machine room M, etc.

(Effects of the Invention) As described above, the present invention uses flat slabs with no beams in the span direction in the central hallway, and ribbed slabs in the span sections on both sides of the central hallway, increasing the ceiling height and creating space for ducts. Since the structure is designed to ensure that the ducts pass through the building, there is no need to pass through beams, and the number of floors can be increased without increasing the floor height. And among the floors with a central corridor style,
Ceiling beams will be installed on the top floor, floor beams will be installed on the bottom floor, and seismic walls will be installed at the same location on each floor in the form of a central hallway for the partition walls. Because of this structure, even high-rise buildings can withstand horizontal forces.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the building with some of the middle and lower floors omitted, Figure 2 is a cross-sectional view taken along the line shown in Figure 1, Figure 3 is a cross-sectional view taken along the line shown in Figure 1, and Figure 4 5 is a plan view of FIG. 4, and FIG. 6 is a stress state diagram during earthquake loading. 1... Flat slab, 2... Stud, 3... Small beam, 4... Brace, 5... Partition shear wall, 6...
...Slab with ribs, 10...Ceiling beam, 11...Floor beam, 14,15...Main duct.

Claims (1)

[Scope of Claims] 1. A building with a plurality of consecutive floors in the form of a central hallway, where the central hallway on each floor is a flat slab with no beams in the span direction, and there are gaps between the studs supporting the central hallway in the girder row direction. The frame structure of a building is characterized in that a small beam has been erected at the center of the building, and the span portions on both sides of the above-mentioned central corridor are ribbed slabs. 2 In a building with multiple consecutive floors in the form of a central hallway, the central hallway on each floor is a flat slab with no beams in the span direction, and small beams are constructed in the girder direction between the studs that support the central hallway. The spans on both sides of the above-mentioned middle corridor are ribbed slabs, and earthquake-resistant walls are placed at the same planar position on each floor equipped with a middle corridor. A building frame structure characterized by having ceiling beams on the top floor and floor beams on the bottom floor in the span direction.