【摘要】 本文结合工程实例润扬长江公路大桥北汊斜拉桥,探讨了斜拉桥有限元计算力学模型的建立方法,主要是各组成部分的简化、各单元计算参数的取值以及边界与连接条件的模拟。同时,利用有限元程序研究了其动力特性,主要包括自由振动频率、相应的振型特性。研究结果不仅为大跨度斜拉桥的分析提供了必要的理论基础,而且对大跨度斜拉桥的设计具有较好的参考价值。更多还原

【Abstract】 Associated with Runyang Yangtze River Highway long-span cable stayed bridges,the mechanical model for finite element calculation method was discussed.The contents include the components simplified,parameter choice and boundary,simulation of the boundary and connecting condition.Finite element program called ANSYS was employed to model the dynamic characteristics and seismic responses analysis of the cable stayed bridges.The free vibration frequency,the vibration characteristics of long-span cable stayed bridges were discussed.The results not only provides the necessary theoretical foundation for relatiue analysis,but also has a good reference value for the design of long-span cable-stayed bridges.更多还原