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| Multi-objective discrete optimization of the orthotrop steel bridge deck surfacing system |
| Received:October 31, 2007 |
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| DOI：10.7511/jslx20095021 |
| KeyWord:long-span steel bridge orthotropic steel bridge deck surfacing system multiple objective discrete optimization Ant algorithm |
| Author | Institution |
| 徐勋倩 |
南通大学,南通 |
| 吴国庆 |
南通大学,南通 |
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| Abstract: |
| This study is concerned with the multiple objective optimum designs of long-span orthotropic steel bridge deck and its surfacing system. The minimum weight of the surfacing system and the maximum work-life of pavement are selected as the design objectives. Each object weight factor is ensured by the way of efficacy function. Based on formulas of mechanical control indexes and fatigue life forecast, the mathematical model for multiple objective optimum designs is established. A new heuristic algorithm, Ant algorithm, is introduced to the structural optimization problem,and a multiple objective discrete optimization design program for the orthotropic steel bridge deck surfacing system is developed. The optimization values of parameters for steel bridge surfacing system are obtained through multiple-objective optimal design for a long-span steel bridge in China. The multiple-objective optimum design of long-span steel bridge surfacing system is proven to be reasonable and may be used to provide a theoretical basis for the design of the surfacing system of large-span steel bridges. |