Seismic performance analysis of a concrete filled steel tubes arch bridge: A parametric study

Abstract

Abstract Numerical method is widely used in bridge seismic performance analysis, but the diversity and complexity structures increase trouble in the modeling process. This article presents a systematic, universal, and flexible bridge numerical modeling method, and the seismic performance of a concrete filled steel tubes arch bridge is studied. The geometric/attribute model involves structural/stiffness equivalence, and the bridge parametric modeling strategy combined commercial computer‐aided design language of software MATLAB and ANSYS. Data exchange in different fields and rapid reconstruction of numerical model are realizing. Finally, the vibration mode, deformation and internal force of the bridge under seismic load are studied. The results indicating that the proposed parametric model formed a complete data transfer process, and the bridge model can be rapidly modifying and reconstructing. The numerical calculation efficiency is greatly improved because of the structure element is employed instead of solid element. The displacement and internal force of arch rib are mainly controlling by lateral load under horizontal uni‐input, and the combined horizontal and vertical load should be considering in seismic design. The leaning angle and width‐span ratio of transverse braces are considered to improve the seismic performance of bridges.

Keywords

• CFST arch bridge
• dynamic response
• modal analysis
• parametric design
• seismic performance