大跨拱桁架地震作用下的动力响应研究

借助动力分析软件ANSYS对大跨钢管拱桁架结构在地震波作用下的动力响应进行了研究,主要对该结构在水平方向EL Centro地震波作用下的动力响应过程进行了全程跟踪,主要从动力响应过程、节点位移响应、节点屈服位移比的变化、杆件截面塑性发展情况、杆件塑性应变发展情况几方面进行了详细研究,同时初步研究了多维输入地震波和杆件弯曲变形这两个因素对拱桁架动力性能的影响,得出了一些有益的结论。

Dynamic Response Study of Long-span Arch Truss under the Earthquake Action

With the help of dynamic analysis software ANSYS,this paper studies the dynamic response of long span steel tube arch truss structure under the action of seismic wave which mainly tracks the dynamic response process of the structure in horizontal direction EL Centro under the action of seismic wave all the way.The study focuses on dynamic response process,nodal displacement response,node yield displacement ratio change,bar section plastic development conditions and bar plastic strain development.At the same time,preliminary study is carried up on the influence of the multidimensional input seismic waves and the bending deformation on the arch truss dynamic performance.In the end some useful conclusions are obtained.