Mechanical Performance and Spatial Stability under Live Load and Wind on Tied-Arch Bridge

Abstract:

Finite element model of the background tied-arch bridge was established and analyzed. Meanwhile, mechanical performance and stability of it under several kinds of simulate structural defects and damages were studied. Some typical damage and influence factors were presented in the beginning. Then, based on the finite element model, the distribution of suspender force corresponding to the simulated defects and failure was calculated respectively. At last, the first class stability safety factor under the combination load was calculated as well as the second class nonlinear stability safety factor under structural arch rib defect. Results of above calculation imply that, suspender forces gained a stronger sensitivity to vertical defect than to transverse defect. While, short suspenders were believed to be more sensitive to lineation defect than long ones according to calculation results. Additionally, secondary inner force of short suspenders was much more intensive than in long ones. The result also tells that lateral wind did bad to stability. Lift wind, contrarily, made a little positive contribution to structures in-plane stability. Simulated structural defects were supposed to aggravate the second class stability safety factor under geometric nonlinear condition.

• Periodical: Applied Mechanics and Materials (Volumes 501-504)
• Pages: 1238-1242
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.501-504.1238
• Online since: January 2014
• Authors: Li Wang*
• Keywords: Arch Bridge, Non-Linear Analysis, Stability, Structural Defect, Suspender Failure, Suspenders

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