Performance analysis of V-shaped rigid structure continuous beam bridge with single-rib arch strengthening
This research aims to beautify the bridge type,improve the spanning capacity of the continuous beam bridge,and effectively solve the engineering problems such as cracks caused by stress concentration in key parts.Taking Fuzhou Bay Bridge as an example,the single-rib arch reinforced V-shaped rigid structure continuous beam bridge structure is put forward.Analysis results show that the structure effectively controls the occurrence and development of cracks by adjusting the stiffness of the arch rib,optimizing the structure design and developing the corresponding construction technology;in terms of overall force,the arch rib shares 34.4%of Phase II constant load and 23.5%of bending moment in live load,which has a good strengthening effect;the local stress concentration area appears at the lifting point,which is effectively solved by strengthening the thickness of the steel plate;the stiffness difference between the flange plate of the cross beam and the box girder is large,and the tensile stress is relatively concentrated,so the chamfer between the beam and the box girder is adopted to meet the mechanical index.Years of operation monitoring has proved the rationality and feasibility of the single-rib arch reinforced V-shaped rigid structure continuous beam bridge,which can provide technical guidance for the design and construction of similar bridges.
V-shaped rigid structure continuous beam with single-rib arch strengtheningbeam-arch combined structure3D simulation of full bridge space gridpractical fine analysis
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