With the expansion of domestic infrastructure and transportation networks,swivel construction ensures compatibility between new bridges and existing lines.Yet,long-span bridges crossing existing routes,characterized by high piers and heavy loads,are vul-nerable to wind effects.focusing on a rigid frame bridge.Taking the Dashucun Longchuan River Third-line Bridge as the research subject,employing numerical simulations including finite element analysis and computational fluid dynamics,we model the swivel su-perstructure and calculate aerodynamic coefficients.Through simulations under static and dynamic wind loads,the most unfavorable load conditions are identified.Modal analysis of pre and post-swivel states pinpoints critical construction stages.The study offers a scientific foundation and technical guidance for wind-resistant design of swivel girder bridges.
维普
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