考虑地震行波效应大型高架桥梁破坏模拟

大型高架桥梁是城市交通的重要生命线工程,准确预测高架桥(高架桥体系)在地震下的破坏模式,对减灾、救灾工程有着重要意义.本文基于高性能并行计算和非线性分析,对大型高架桥梁的破坏进行了模拟,并考虑了地震行波效应、桥墩塑性铰、上部结构落梁等多种破坏模式.计算结果表明,本文建议模型可以真实模拟大型高架桥梁的地震破坏.并对主要参数的影响加以讨论,为深入研究高架桥梁体系在地震灾害下的破坏模式和安全状况提供依据.

Failure Simulation for Large Viaducts with Traveling Wave Effect

Viaducts are important life lines in the city transport system.Precision prediction for the failure modes of large viaducts(viaduct system) in earthquake is important for the disaster prevention and reduction.In this paper,based on high performance computation and nonlinear analysis,the failure of large viaducts in earthquake is simulated with the consideration of travel wave effect in the ground,plastic hinges in the pier and the girder falling in the superstructures.The simulation results show that the proposed model can correctly simulate the failure of large viaducts in earthquake.And parametrical study is carried out for the further research on the safety assessment of the large viaducts.