CN2663553Y

CN2663553Y - Composite beam of floorslab on bottom flange of steel beam

Info

Publication number: CN2663553Y
Application number: CN 03262684
Authority: CN
Inventors: 丁维; 孙彤; 郝际平; 王俊峰; 王连坤; 赵桥荣
Original assignee: Xian University of Architecture and Technology
Current assignee: Shandong Laigang Construction Co., Ltd.; Xian University of Architecture and Technology
Priority date: 2003-08-26
Filing date: 2003-08-26
Publication date: 2004-12-15
Anticipated expiration: 2013-08-26

Abstract

The utility model discloses a combinatorial beam structure in which a floor slab is arranged under the lower edge of a steel beam. The utility model consists of an armored concrete floor slab(1), the steel beam(2), and the final armored concrete floor slab(1) is arranged under the lower edge of the steel beam(2). The structure can reduce the floor height on the condition of the same net height of the floor; can reduce the area of outer protecting wall effectively, the energy consumed by an indoor air condition and maintaining cost of the building, and also has favorable earthquake resistance.

Description

Floor is positioned at the compound beam of girder steel bottom flange

One, technical field:

The present invention relates to a kind of building construction, particularly a kind of floor is positioned at the compound beam structure of girder steel bottom flange.

Two, technical background

Needs and progress of science and technology along with social production and people's life, high building structure has begun in China very big development has been arranged since the seventies in 20th century, high-rise building steel structure particularly is because its intensity height, ductility is big, anti-seismic performance good and extensively adopted by the structural engineer.Building height constantly increases, and must cause increasing substantially of construction cost.In order to reduce construction cost, improve the profit of enterprise, the headroom utilization rate all in the overall height of trying every possible means to reduce building under the prerequisite of the assurance building number of plies, improves in the enterprise of building trade, and this has just caused the generation of the new structure system different with the traditional structure form.

It is to utilize steel and two kinds of material behaviors of concrete to unite to become whole and cooperative a kind of form of structure that floor is positioned at girder steel bottom flange compound beam, compare with the structure that homogenous material is made, can improve the strength and stiffness of structure, save steel, reduce cost, significant techno-economic effect can be arranged.The compound beam decapacitation makes full use of outside the stress performance of steel and two kinds of materials of concrete.All right: 1. reduce the cross section, because quite wide concrete participates in resistance to compression, the moment of inertia of compound beam is more much bigger than the girder steel, can reach the reduction deck-molding, increases the effect of floor height.2. good stability because the lateral rigidity of compound beam top flange is big, so resistance to overturning is good, adds that the compression flange of girder steel is subjected to the constraint of concrete slab, and the local stability of its edge of a wing and web all improves.3. ductility is good, because energy dissipation capacity is strong, resistance to overturning is good, shows good seismic resistance in earthquake centre practically.4. shock resistance, anti-fatigue performance are good, and actual engineering shows and be used for bridge that the compound beam of crane girder has better shock resistance, the ability of antifatigue.5. the operating period prolongs, because the existence of concrete slab makes the stress level of girder steel top flange reduce, because the damage that the crack causes is less, has improved many application life compared with steel crane beam.But,, correspondingly increased the workload that connector is made and welded because group and beam have increased connector than non-compound beam.

Three, summary of the invention

The purpose of this utility model is that a kind of new combined beam structure is provided on the basis of prior art compound beam, and the compound beam of this structure can reduce floor height under the identical condition of floor clear height.This combined beam structure can effectively reduce the required energy of exterior enclosure wall area savings room conditioning, reduces the building maintenance usage charges, and anti-seismic performance is good.

In order to solve the problems of the technologies described above, the utility model is achieved in that

It comprises reinforced concrete floor (1), girder steel (2), is furnished with reinforcing bar (8) in the described reinforced concrete floor (1), and fluid concrete, described girder steel (2) is welded into i iron by web (3), top flange (4) and bottom flange (5) splicing, and an end face of described reinforced concrete floor (1) places the upper end of girder steel (2) bottom flange (5) also fixedly connected; Go up welding WELDING STUDS (6) in the bottom flange (5) of girder steel (2).

Girder steel (2) is welded steel beam or rolling H section steel beam.

The utility model has following beneficial effect compared with prior art:

1, the type of attachment of type of attachment of the present utility model and prior art is compared and can be reduced the required energy of exterior enclosure wall area savings room conditioning.

2, under the condition that building general height is determined, adopting the utility model can increase than adopting the prior art floor, thereby increases building area.

3, rigidity infinity in the utility model structure floor plane.

4, type of attachment of the present utility model and prior art type of attachment are compared, type of attachment energy dissipation capacity of the present utility model tradition connects eager to excel in whatever one does, anti-seismic performance is good, ductility obtains very big raising, from but a kind of structure of good seismic performance, more traditional connected mode more can be applicable to the earthquake zone.

Four, description of drawings

Fig. 1 is positioned at the compound beam cross section structure figure of girder steel top flange for the prior art floor;

Fig. 2 is positioned at compound beam (being fixed by WELDING STUDS) the cross section structure figure of girder steel bottom flange for the utility model floor;

Fig. 3 is positioned at compound beam (being fixed by negative muscle) the cross section structure figure of girder steel bottom flange for the utility model floor;

Five, the specific embodiment

Below in conjunction with drawings and Examples the utility model is described further:

Embodiment:

The utility model comprises reinforced concrete floor 1, girder steel 2, and an end face of the reinforced concrete floor of making 1 places the upper end of girder steel 2 bottom flanges 5, and girder steel 2 is fixing by WELDING STUDS 6 with reinforced concrete floor 1.

Referring to Fig. 2, Fig. 3, the utility model manufacturing process is as follows:

1, make girder steel: according to construction work and construction process requirement, the number of carrying out material, blanking; With web 3 and top flange 4, bottom flange 5 splicings, be assembled into i iron, girder steel is welded; And correct distortion and go up stiffening rib, to guarantee the upright position of girder steel, at last girder steel is lifted.

2, the making of concrete slab: the pertinent regulations according to execution conditions and " reinforced concrete construction and standards of acceptance ", can adopt cast-in-place plate, the reinforced concrete floor of making 1 is placed on girder steel 2 bottom flanges.

3, the interim support: when according to designing requirement, when beam need be established interim support, after the girder steel lifting,, interim support is set promptly by the design drawing requirement, when strength grade of concrete reaches designing requirement, dismountable interim support.

4, remove the steel pollutant: in order to guarantee the bonding force between girder steel and the concrete, the girder steel bottom flange must not brushing paint, should remove iron rust before the pouring concrete plate, welding slag, ice sheet, accumulated snow, earth and other foreign material.

5, install: on the bottom flange of girder steel 2, weld WELDING STUDS 6 according to designing requirement, and guarantee the long (see figure 2) of suitable spacing, diameter and bar of WELDING STUDS 6.Also have a kind of fixing means to be in addition: negative muscle 7 is worn in punching on the web 3 of girder steel 2, and negative muscle 7 and web 3 are welded (see figure 3).

6, pressing the conventional method fluid concrete gets final product.

Claims

1. a floor is positioned at the compound beam of girder steel bottom flange, it comprises reinforced concrete floor (1), girder steel (2), is furnished with reinforcing bar (8) in the described reinforced concrete floor (1), and fluid concrete, described girder steel (2) is welded into i iron by web (3), top flange (4) and bottom flange (5) splicing, it is characterized in that: an end face of described reinforced concrete floor (1) places the upper end of girder steel (2) bottom flange (5) also fixedly connected; Go up welding WELDING STUDS (6) in the bottom flange (5) of girder steel (2).

2. floor according to claim 1 is positioned at the compound beam of girder steel bottom flange, it is characterized in that: girder steel (2) is welded steel beam or rolling H section steel beam.