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Retrofit Optimization for Resilience Enhancement of Bridges under Multihazard Scenario
| 题名： | Retrofit Optimization for Resilience Enhancement of Bridges under Multihazard Scenario |
| 正文语种： | 英文 |
| 作者： | Sandhya Chandrasekaran;Swagata Banerjee, A.M.ASCE |
| 作者单位： | Pennsylvania State Univ;Indian Institute of Technology Bombay |
| 关键词： | Optimization; Resilience; Seismic retrofit; Flood-induced scour; Fragility curves. |
| 摘要： | Bridge retrofitting is a common approach to enhance resilience of highway transportation systems. The study uses a multiobjective evolutionary algorithm to identify retrofit design configurations that are optimal with respect to resilience and retrofit cost. Application of this algorithm is demonstrated by retrofitting a bridge with column jackets and evaluating resilience of the retrofitted bridge under the multihazard effect of earthquake and flood-induced scour. Three different retrofit materials are used: steel, carbon fiber, and glass fiber composites. The inhere nt disparity in mechanical properties and associated costs of these different materials gives rise to a trade-off between cost and performance when it comes to retrofit operations. Results from the optimization, the Pareto near-optimal set, include solutions that are distinet from one another in terms of associated cost, contribution to resilienee enhancement, and values of design parameters. This optimal set offers the best search results based on selected materials and design configurations for jackets. DOI: 10.1061/(ASCE)ST .1943-541 X.0001396. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.08 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.08 |
| 页码： | C4015012 |
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