【摘要】 以三心圆钢管拱桁架储煤棚为研究对象,采用有限元SAP2000软件,对矢跨比为0.35、跨度为94 m的钢管拱桁架的动力特性及抗震性能进行了分析,得到了该结构振型特点、自振频率、地震作用下的内力分布。分析结果表明,该结构承载力满足使用要求,但在其两端圆弧相切处存在应力集中,并指出了薄弱部位,为拱桁架的设计提供了理论依据和技术参考。更多还原

【Abstract】 Take the three circular steel tube arch truss reserving shed as the research object,using the finite element software SAP2000,analyzed the dynamic characteristics and seismic property of steel tube arch truss which the rise to span ratio is 0.35 and the span is 94 m,obtained the structure formation characteristics,internal array frequency and the internal force distribution of the structure under action of earthquake.The results show that: the bearing capacity of the structure meet the requirement of using,but the stress concentrated at both ends of the arc tangent,also point out the weak part.This research puts forward the theoretical and technical reference for the design of arch truss.更多还原