【摘要】 斜拉桥是大跨度桥梁采用的重要结构形式,其计算模型的好坏直接关系到计算分析的准确可靠性。本文对大跨度斜拉桥三维有限元动力模型建立技术的各个关键环节进行了详细剖析,并对实际的建模及调整提出了完整的解决方法,通过建立某大跨度斜拉桥的三维有限元动力模型,并利用试验测试的模态结果,验证了该模型的准确性和建模方法的有效性。最后对准确有效地建立大跨度斜拉桥的三维有限元动力模型提出了若干有益的建议。更多还原

【Abstract】 Cable-stayed bridge (CSB) is an important structural style in long span bridges. A proper calculation model can obtain accurate and reliable results. In this paper key steps of dynamic modeling a CSB with long span are described and commented in detail. According to the modeling methods, a 3-D finite element dynamic model of a CSB with long span is established, and a whole solution to modeling and adjusting model is put forward. Efficiency and veracity of the model are verified through modal analysis and comparing with test results. Finally, some conductive suggestions for dynamic modeling a CSB with long span are provided.更多还原