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Steel-concrete combined type bridge beam slab

A combined, rubberized concrete technology, applied in bridges, bridge construction, bridge materials, etc., can solve the problems of fatigue fracture of shear connectors, fatigue failure of concrete beams and slabs, etc., and achieves reasonable cross-section setting, novel and outstanding combination method, good The effect of compressive properties

Inactive Publication Date: 2017-01-04
ZHEJIANG UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of steel-concrete composite beams in existing projects, which are prone to fatigue failure of the concrete beam slab itself and fatigue fracture of the shear connectors between concrete and steel, the present invention provides a method that can effectively avoid shear resistance. Fatigue Fracture of Connectors, Steel-Concrete Composite Bridge Girder Slab Without Shear Connectors

Method used

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  • Steel-concrete combined type bridge beam slab
  • Steel-concrete combined type bridge beam slab
  • Steel-concrete combined type bridge beam slab

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Embodiment Construction

[0023] refer to Figure 1 to Figure 3 , steel-concrete combined bridge beam slab, comprising an upper prefabricated slab 1 and a lower I-shaped steel beam 2, the bottom of the upper prefabricated slab 1 is provided with an inwardly depressed longitudinal rib-shaped groove 11; the described The top of the lower I-shaped steel beam 2 is welded with a threaded steel plate 3, the longitudinal rib-shaped groove 11 fits with the threaded steel plate 3, and the longitudinal rib-shaped groove 11 and the threaded steel plate Concrete grout 4 is poured into the gap between 3 .

[0024] The concrete layer between the upper prefabricated slab 1 and the lower I-shaped steel beam 2 is sandblasted.

[0025] Such as figure 2 As shown, in the combined bridge beam slab, there are mainly two contact surfaces: the bonding surface between the threaded steel plate and the high-strength cement slurry, and the bonding surface between the sandblasted concrete and the high-strength cement slurry. I...

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Abstract

The invention discloses a steel-concrete combined type bridge beam slab. The steel-concrete combined type bridge beam slab comprises an upper part prefabricated slab and a lower part I-shaped steel beam, wherein a longitudinal rib-shaped groove which is depressed inwards is formed in the bottom of the upper part prefabricated slab; a steel slab with threads is welded to the top of the lower part I-shaped steel beam; the longitudinal rib-shaped groove is matched with the steel slab with the threads; and concrete grout is poured in a gap between the longitudinal rib-shaped groove and the steel slab with the threads. According to the steel-concrete combined type bridge beam slab disclosed by the invention, arranging shearing resistance connecting pieces is not needed, so that the own fatigue failure of the connecting pieces is effectively avoided; and besides, the combined type beam slab also has a series of advantages that the construction is quick, convenient and fast, the connection between the concrete slab and the steel beam is close, and the section is reasonably arranged.

Description

technical field [0001] The invention relates to a steel-concrete combined bridge girder slab, which belongs to the field of bridge girder slabs. Background technique [0002] Bridge girder and slab components are the main load-bearing components of the bridge superstructure, which directly bear the vehicle load transmitted by the upper vehicle. Its use environment is complex and long-term service. If there is serious damage and deformation, it will greatly affect the stability and stability of the bridge structure itself. Safety, sometimes it will bring a greater disaster accident - the overall collapse of the bridge deck. [0003] In engineering, steel-concrete composite beams generally use concrete on the upper part and I-beams on the lower part, and the two are connected by shear connectors. The main problem with this method is that two types of fatigue damage often occur in traditional composite beams: fatigue crack damage of the concrete beam slab itself and fatigue fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/02
CPCE01D2/02E01D2101/268
Inventor 卢彭真唐峰卢彭龙
Owner ZHEJIANG UNIV OF TECH
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