Dynamic Response Analysis of Half-through CFST Arch Bridges Affected by Crossbeams Setting

Abstract:

As one of the most important components of CFST arch bridges, the cross beams should affect the bridges’ dynamic performance and response magnificently by means of affecting these three factors mentioned above. Based on the Maocaojie Bridge, its FEM models of half-through CFST arch bridges with different settings of cross beams are built. The different seismic responses of six operating conditions are calculated with three dimensional earthquake waves input. The internal force and displacement envelope diagrams of arch ribs are extracted and analyzed in situations of in-plane moment, out-plane moment, vertical displacement and transverse displacement. It can conclude that the joint section between arch rib and bridge deck should be designed carefully because of its large displacement and internal force, and the cross beams should be optimized to safety the arch bridge dynamic response considering lateral rigidity. The conclusions may be useful to the seismic design and strengthening treatment of CFST arch bridges. To strengthen the joint section between arch rib and bridge deck or optimize the setting of cross beams will increase the ductility of half-through CFST arch bridge and decrease the damages caused by large earthquake.

• Periodical: Advanced Engineering Forum (Volume 5)
• Pages: 201-206
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.5.201
• Online since: July 2012
• Authors: Jun Ma, Yan Li
• Keywords: Bridge Engineering, Crossbeams, Dynamic Response, Finite Element Method (FEM), Half-Through CFST Arch Bridges

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