CN2661809Y

CN2661809Y - nternal force adjustable prestressed steel-concrete combination beam

Info

Publication number: CN2661809Y
Application number: CN 200320118049
Authority: CN
Inventors: 李勇; 陈善军; 郭帅
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-11
Filing date: 2003-11-11
Publication date: 2004-12-08
Anticipated expiration: 2013-11-11

Abstract

The utility model discloses a pre-stressed steel-concrete composite beam which can adjust internal force, comprising two steel beams (1) with the same length and spliced with each other, and a vertical pillar (2) is respectively positioned at the two ends of the steel beams (1) far away from the spliced ends. The utility model is characterized in that the spliced ends of the two steel beams (1) are rigidly connected by a high strength bolt (5); a plurality of shear keys (4) fixedly connected with the steel beams (1) are evenly distributed along the length direction on the top of the steel beams (1); the steel beams (1) are covered with concrete layer (3); the steel beams (1) adopt steel beam with a shape like a Chinese character ''gong'' or box-shaped steel beam, and the shear keys (4) are T-shaped steel welding nails which are welded with the steel beams (1); while in construction, a temporary center pillar (6) is arranged under the spliced line for supporting. The utility model overcomes the problems of complex structure and inconvenient construction in prior steel beams, and has the advantages of simple structure and convenient construction, and can be widely used in the building industry, in particular in the bridge construction.

Description

Can adjust the prestress steel-concrete combination beam of internal force

Technical field the utility model relates to a kind of prestress steel-concrete combination beam of adjusting internal force, more particularly, relates to a kind of need not the steel bundle and can obtaining prestressed steel-concrete combination beam of bridge, building structure that be particularly suitable for.

Background technology in the prior art, the relevant report of existing prestress steel-concrete combination beam, ZL94248089.9 disclosed " interconnection system concrete blinding compound beam " is the square-section, some holes are arranged on it, the beam head is provided with monaural and ears, also have connecting pin, alignment pin and location to insert yesterday etc., its structure is comparatively complicated, the construction trouble.Of the present utility model can the conversion by system saved prestressed strand, obtains prestressing force, increases economic efficiency.

The feature that the summary of the invention the purpose of this utility model is to utilize cross section and internal force all changing, can carry out the system conversion to structure, need not prestressed strand, can obtain prestressing force, thereby adjust the structural internal force state, formation meets this principle of compound beam of requirement of strength, designs a kind of prestress steel one concrete combination beam of the internal force adjusted of simple in structure, easy construction.

In order to achieve the above object, the utility model provides following technical scheme: design a kind of prestress steel-concrete combination beam of adjusting internal force, comprise two identical and girder steels (1) that splice each other of length, girder steel (1) has vertical pillar (2) respectively away from the two ends of splice ends, splice ends at two girder steels (1) is rigidly connected by high-strength bolt (5), have several equally distributed shear connectors (4) and layer of concrete (3) on the extending direction of girder steel (1) end face, shear connector (4) is with girder steel (1) fixedlys connected.Described layer of concrete (3) is a back pouring concrete layer, the layer of concrete that waters again after being about to shear connector (4) and girder steel (1) being connected; The utility model is in work progress, earlier two girder steels (1) frame is gone up contraposition at pillar (2) and center prop (6), adopt high-strength bolt (5) to connect or welding, below match line, support with center prop (6), go up shear connector (4) in the welding of girder steel (1) end face, at girder steel (1) top-pour layer of concrete (3), after layer of concrete (3) fully condenses, take out center prop (6) and get final product then.

The utility model technical scheme preferably is: girder steel (1) is steel I-beam or box steel beam, when girder steel (1) when being box steel beam, can add wide steel plate thereon or on two vertical steel of box steel beam, add two narrower steel plates respectively, concrete prefabricated board (7) on the frame again, and then water layer of concrete (3).Upper limb layer of concrete of the present utility model bears compressive stress, and the lower edge girder steel bears tensile stress, gives full play to mechanical properties of materials.

The utility model technical scheme preferably can be: shear connector (4) is T steel weldering nail, and the weldering nail is with girder steel (1) and is welded to connect, and also can adopt reinforcing bar to replace.

Compared with prior art, the utility model utilizes cross section and internal force all changing, and can carry out the system conversion to structure, thereby adjust the structural internal force state, formation meets this principle of compound beam of requirement of strength, advantages such as that designed compound beam has is simple in structure, easy construction are with a wide range of applications in building trade especially bridge construction.

Be description of drawings of the present utility model below the description of drawings:

Fig. 1 is a contour structures schematic diagram of the present utility model;

Fig. 2 is a construction status architecture schematic diagram of the present utility model;

Fig. 3 is the cross-sectional structure schematic diagram of i iron compound beam;

Fig. 4 is the cross-sectional structure schematic diagram of box-shaped steel combination beam;

Fig. 5 is the cross-sectional structure schematic diagram that the box-shaped steel adds the concrete prefabricated board compound beam.

Among Fig. 1～Fig. 4, the 1st, girder steel, the 2nd, pillar, the 3rd, layer of concrete, the 4th, shear connector, the 5th, high-strength bolt, the 6th, center prop, the 7th, concrete prefabricated board.

By specific embodiment the utility model is carried out more detailed description below the specific embodiment:

With reference to Fig. 1,3 and 4, can adjust the prestress steel-concrete combination beam of internal force, two identical and girder steels (1) that splice each other of length, girder steel (1) has vertical pillar (2) respectively away from the two ends of splice ends, on girder steel (1), has layer of concrete (3), have several equally distributed steel fasteners (4) on the extending direction of girder steel (1) end face, high-strength bolt (5) and back pouring concrete layer (3) are linked to be an integral body with two girder steels (1), Figure 3 shows that steel I-beam, Figure 4 shows that box steel beam, steel fastener (4) is T steel weldering nail, and the weldering nail is with girder steel (1) and is welded to connect.

With reference to Fig. 2, in the construction, below match line, support with center prop (6).

With reference to Fig. 5, the two narrower steel plates concrete prefabricated board (7) of having put on the shelf.

Claims

1, a kind of prestress steel-concrete combination beam of adjusting internal force, comprise two identical and girder steels (1) that splice each other of length, girder steel (1) has vertical pillar (2) respectively away from the two ends of splice ends, it is characterized in that: the splice ends of two girder steels (1) is rigidly connected by high-strength bolt (5), have several equally distributed shear connectors (4) and layer of concrete (3) on the extending direction of girder steel (1) end face, shear connector (4) is with girder steel (1) fixedlys connected.

2, compound beam according to claim 1 is characterized in that: girder steel (1) is a steel I-beam.

3, compound beam according to claim 1 is characterized in that: girder steel (1) is a box steel beam.

4, compound beam according to claim 1 is characterized in that: shear connector (4) is T steel weldering nail, and the weldering nail is with girder steel (1) and is welded to connect.