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Proceedings Paper

Highway bridge unseating and reduction analysis using SMA restrainers under earthquake excitations
Author(s): Anxin Guo; Qingjie Zhao; Hui Li
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Paper Abstract

During the past several strong earthquakes, most of the highway bridge suffered from unseating and pounding damage due to large displacement between the adjacent frames. One traditional approach for mitigating the unseating of the highway bridge is to use restrainers made of steel cables and rods. However, the elastic design demands of the restrainers will induce large additional forces on the structural components of the bridges. The aim of the study is to investigate the effects of the strong ground motions on the unseating and pounding damages of the base-isolated highway bridges, and the performance of the shape memory alloy (SMA) restrainers for the unseating reduction of the highway bridge. An analytical model of the highway bridge with SMA restrainers and pounding effects is established, and the performance of the SMA restrainer for eliminating the bridge unseating and pounding of the highway bridge is also analyzed. Numerical simulation results indicate that the pounding strongly increase the structural responses and the SMA restrainer can be effectively used to mitigate the bridge unseating and pounding damage when subjected to the strong ground motions.

Paper Details

Date Published: 20 October 2009
PDF: 7 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74931F (20 October 2009); doi: 10.1117/12.843473
Show Author Affiliations
Anxin Guo, Harbin Institute of Technology (China)
Qingjie Zhao, Harbin Institute of Technology (China)
Hui Li, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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