特大型梁式渡槽底板的动力结构性态计算及研究

Calculation and Research on Dynamic Structural State of the Bottom Plate of Extralarge Beam Aqueduct

由于特大型梁式渡槽底板的抗震安全是渡槽正常服役的关键,深入研究其结构抗震特性则十分必要。为了研究渡槽及其槽身底板的动力特性,采用时程分析法研究特大型渡槽槽身各关键部位的地震响应,计算槽身地震响应的最值以及分析槽身底板的动力特性。进一步地,计算研究渡槽底板的结构动力响应和动力特性。由工程案例可知,该有限元计算模拟方法的结果符合特大型渡槽的动力特性规律,该方法具有较高的工程可靠性。研究成果能够服务于大型梁式渡槽底板的抗震计算及优化设计。

Since the seismic safety of extra-large beam aqueduct bottom plate is the key to the normal service of the aqueduct,it is necessary to deeply study its structural seismic characteristics.In order to study the dynamic characteristics of the aqueduct and its floor,the seismic response of key parts of the extra-large aqueduct body is studied by timehistory analysis method,the maximum value of the seismic response of the aqueduct body is calculated and the dynamic characteristics of the floor of the aqueduct body are analyzed.Further,the structural dynamic response and dynamic characteristics of aqueduct bottom plate are calculated and studied.It can be seen from the engineering case that the result of the finite element calculation and simulation method accords with the dynamic characteristic law of extra-large aqueduct,and the method has high engineering reliability.The research results can be used for seismic calculation and optimal design of slab of large beam aqueduct.