【摘要】 以一座三跨连续刚构桥为研究对象,利用大型通用有限元程序,建立了其三维有限元动力计算模型。通过模态分析,得到桥梁的自振特性。借鉴建筑结构抗震设计标准地震反应谱,进行桥梁的地震谱响应分析。通过模态的扩展和组合,得到了节点的应力和节点位移响应的时间历程曲线。为曲线连续刚构桥的抗震理论研究和工程设计提供参考依据。更多还原

【Abstract】 A three-dimensional finite element dynamical analysis model of a three-span continual rigid frame bridge is established by the finite element procedure.Through the modal analysis,the self-oscillating feature of the bridge can be obtained.According to the earthquake response spectrum given by the Specifications of Earthquake Resistant Design for Building Structural Engineering,the analysis on the response of spectrum is done.Besides,it is got the stress of the nodes,and the variation of the nodes’ displacement response with time,by expanding and combining the vibration modals.So it can provide the references basis for the anti-seismic theoretical studies and the earthquake resistant design of the curve continual rigid frame bridge.更多还原