摘要
以上海世博会主题馆屋盖结构为研究对象,采用通用有限元程序ANSYS对结构整体模型和屋盖单独模型进行弹塑性极限承载力全过程分析,分析结构的屈服机制、失效机制和结构在屋盖单独模型和整体模型中的全过程反应特征。分析表明,张弦桁架结构的预应力索杆体系可有效提高结构的刚度,结构塑性发展遵循连续梁结构的力学性态,结构的弹性支承边界条件在一定程度上能提高结构的极限承载能力。
Taking 2010 Shanghai Expo theme pavilion as the object,the elastoplastic ultimate capacities of roof structures of theme pavilion are analyzed by using the general finite element program-ANSYS,modeling the integrated and roof itself-only structures analytical model.The yielding mechanism,failure mechanism and the properties of structures response of roof structures in full model and roof model,respectively,are analyzed.The results show that the prestressed cable-strut system of spatial truss string structure can enhance the vertical stiffness and the ultimate capacity of the whole structure.The plastic development mechanism of the structure was following the mechanical property of the continuous beam structure.The elastic rigidity of the supporting structure can increase the vertical ultimate bearing capacity of structures to some degree.
出处
《钢结构》
2010年第4期1-5,共5页
Steel Construction
基金
上海市科委科研计划资助项目(07dz05801)
关键词
张弦桁架
弹塑性极限承载力
失效机制
整体模型
truss string structures
elastoplastic ultimate capacity
failure mechanism
full model
