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Composite beam

A technology of composite beams and steel beams, applied in the field of composite beams, can solve problems such as unfavorable negative bending moments, and achieve the effects of preventing cracking and damage, reducing bridge construction costs, and solving unfavorable forces.

Pending Publication Date: 2021-03-19
GUANGZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve at least one of the above-mentioned technical problems and solve the problem of unfavorable negative bending moment, the present invention provides a composite beam, and the adopted technical scheme is as follows:

Method used

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Embodiment 1

[0032] The invention relates to a composite beam. The composite beam adopts a steel-concrete composite structure to form an assembled simple-support variable continuous composite beam. The composite beam includes at least two span beam sections, and the span beam sections are provided with a bridge deck and a plurality of steel beams 101 It can be understood that the steel girders 101 are arranged side by side on the span section, the bridge deck is paved on the steel girders 101, the asphalt layer 106 is arranged on the composite beam, and the asphalt layer 106 is poured on the bridge deck. Further, the steel beam 101 is set as H-shaped steel.

[0033] The lower edge of the steel beam 101 is provided with a stiffening box 104. The stiffening box 104 is made of steel. The steel structure beam, the variable cross-section beam increases the compression area of ​​the lower edge of the section near the fulcrum, enhances the compression stability, and enhances the compression resis...

Embodiment 2

[0045] The difference between the present embodiment and the second embodiment is that two adjacent span beam sections are connected by a concrete structure. Specifically, in two adjacent span beam sections, two paired steel beams 101 are connected by a concrete structure, a part of the concrete structure is fixed to one of the steel beams 101 by bolts, and the other part of the concrete structure is connected to the other by bolts. The steel beam 101 is fixed, and the concrete structure includes two concrete connecting plates 108, and the two concrete connecting plates 108 are respectively arranged on both sides of the steel beam 101, and the steel beam 101 is provided with a plurality of through holes for bolts to pass through.

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Abstract

The invention discloses a composite beam which comprises at least two span beam sections, each span beam section is provided with a bridge deck slab and a plurality of steel beams, each bridge deck slab comprises a steel fiber reinforced concrete slab and a reinforced concrete slab, the steel fiber reinforced concrete slabs are arranged at the sections of every two adjacent span beam sections, andthe reinforced concrete slabs are arranged on the span beam sections. The steel fiber reinforced concrete slab and the reinforced concrete slab are combined for pavement, the bridge manufacturing cost is reduced, the material properties of the two slabs are fully exerted, the problem that the negative moment area is unfavorable in stress is effectively solved, and the bridge deck slab is prevented from cracking and being damaged in the negative moment area. The composite beam can be widely applied to the technical field of bridge construction.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a composite beam. Background technique [0002] With the popularization of green construction and sustainable construction concepts, the proportion of steel-concrete composite continuous beams in road and railway bridges has gradually increased due to their excellent mechanical properties. The steel-concrete composite continuous beam combines the comprehensive advantages of steel and concrete. It has the advantages of small cross-sectional size, convenient construction, high rigidity, reasonable force, and high material utilization rate. It is a sustainable bridge structure. However, the steel-concrete composite continuous beam has negative bending moment near the fulcrum of the bridge pier, which is prone to cracking of the concrete bridge deck, which weakens the stiffness of the section and seriously affects the durability of the bridge; at the same time, the lower ...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D19/12E01D101/26E01D101/30
CPCE01D19/00E01D19/125E01D2101/26E01D2101/30
Inventor 刘爱荣龙绍海洪涌强黄晓虹郭超红陈炳聪唐文乐
Owner GUANGZHOU UNIVERSITY
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