Steel-concrete composite beam bridge hogging moment area bridge deck structure adapting to deformation and construction method

Abstract

The invention relates to a steel-concrete composite beam bridge hogging moment area bridge deck structure adapting to deformation and a construction method, the steel-concrete composite beam bridge hogging moment area bridge deck structure adapting to deformation comprises a steel beam, a pavement surface layer, a pavement base layer and a bearing plate, the beam height of the steel beam in a hogging moment area is 10-40 cm higher than the beam height in a positive bending moment area, and the pavement base layer is located above the bearing plate; wherein an upper wing plate of the steel beam is embedded in the paving base layer or between the paving base layer and the paving surface layer, a local reinforcing net is arranged on the upper side of the upper wing plate of the steel beam or on the upper side and the lower side of the upper wing plate of the steel beam, and the local reinforcing net is combined with the paving surface layer or the paving base layer. The bridge deck structure is small in rigidity, the deformation capacity of the bridge deck structure is better under the action of loads, meanwhile, the connection between the bridge deck structure and the upper wing plate of the steel beam is weakened, the bridge deck structure bears smaller negative bending area tensile stress, and therefore the bridge deck structure can well adapt to the characteristic of large deformation of a negative bending moment area of a composite beam bridge.

Description

technical field [0001] The invention relates to a steel-concrete composite girder bridge adaptable to deformation and a construction method in the negative moment zone, belonging to the technical field of civil engineering. Background technique [0002] The steel-concrete composite beam structure is widely used in road, bridge and construction fields because of its reasonable and economical material utilization, fast construction speed and strong practicability. However, the concrete in the negative moment zone of composite continuous beams is prone to cracking under tension, resulting in poor durability of composite beams. To solve this problem, there are mainly the following methods at present: 1. Change the construction sequence so that the steel girders in the negative moment area are fully tensioned and then construct the bridge deck to reduce the tensile stress of the bridge deck; 2. Increase the reinforcement ratio of the bridge deck structure Or use high-performance...

AI Technical Summary

Problems solved by technology

However, by changing the construction sequence, the concrete bridge deck still bears most of the unfavorable effects of long-term loads after the bridge is completed; adding reinforcement and other methods alone will work with cracks for a long time, which will have an adverse effect on durability; methods such as applying precompression stress Inevitably, additional stress is applied to the shear connectors, which not only increases the burden on the steel beam, but also weakens the effect of the pre-compression stress applied to the concrete slab

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