三跨曲线刚构桥地震谱响应分析
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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。
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.
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.
引文
1邵旭东.桥梁工程.北京:人民交通出版社,2003:197-198
2朱东生,刘世忠,虞庐松.曲线桥地震反应研究.中国公路学报,2002,15(3):42-48
3李权.ANSYS土木工程中的应用.北京:人民邮电出版社,2005:243-251
4郝文化.ANSYS土木工程应用实例.北京:中国水利水电出版社,2005:165-167
5彭雪林,任维新,葛继平.大跨度斜拉桥的建模与模态分析.全国结构计算理论与工程应用学术会议论文集.上海:同济大学出版社,2003:414-417
6范立础.桥梁抗震.上海:同济大学出版社,1997:58-63
7郭继武.建筑抗震设计.北京:中国建筑工业出版社,2002:45-48
2朱东生,刘世忠,虞庐松.曲线桥地震反应研究.中国公路学报,2002,15(3):42-48
3李权.ANSYS土木工程中的应用.北京:人民邮电出版社,2005:243-251
4郝文化.ANSYS土木工程应用实例.北京:中国水利水电出版社,2005:165-167
5彭雪林,任维新,葛继平.大跨度斜拉桥的建模与模态分析.全国结构计算理论与工程应用学术会议论文集.上海:同济大学出版社,2003:414-417
6范立础.桥梁抗震.上海:同济大学出版社,1997:58-63
7郭继武.建筑抗震设计.北京:中国建筑工业出版社,2002:45-48
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