【摘要】 基于反应谱分析法,揭示了强震作用下箱梁桥破坏机制。考虑3种工况,运用有限元软件M idas对连续箱梁桥破坏进行数值模拟,从全桥地震反应谱位移图发现了强震作用下桥台台顶变形位移值十分明显。通过对主梁内力响应变化规律研究,揭示了横、纵向地震控制梁桥破坏的不同内力;证明了桥墩和跨中截面属于地震响应敏感部位。更多还原

【Abstract】 Based on response spectrum analysis,the paper discussed the failure mechanism of continuous box girder bridges under severe earthquake.Through the study of the internal force responses of girder,it indicated different internal force for transversal and longitudinal earthquake control,and proved that the pier and mid-span are seismic response sensitivity parts.更多还原