Vehicle-Bridge Interaction Analysis of Steel-UHPC Composite Bridge
In order to study the vehicle-bridge interaction(VBI)dynamic effects of steel-UHPC composite beam bridges under vehicle loading,a highway VBI program is established in this paper based on the Python language.Taking a proposed 56 m simply supported steel-UHPC composite beam bridge as the research object,the influence of different vehicle speeds,road roughness,and steel beam bottom plate thickness on the VBI response of the bridge is analyzed.The research results show that when the road roughness level is A,the bridge dynamic impact coefficient is less than 0.09 and the Sperling ride comfort index is less than 2.5 for vehicles passing at different speeds,indicating that the overall dynamic effect is not significant.The road roughness level has a significant influence on the vehicle-bridge coupling dynamic effects.As the road roughness increases,all dynamic response indicators show a significant upward trend.The variation of the steel beam bottom plate thickness within a reasonable range has a limited influence on the bridge dynamic response.
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