正三角形立体管桁架与单层柱面网壳杂交结构的设计与分析  

DESIGN AND ANALYSES OF HYBRID-STRUCTURE BY REGULAR TRIANGULAR SPATIAL TRUSSES AND SINGLE-LAYER CYLINDRICAL RETICULATED SHELLS

作　　者：王澈泉[1] 申波[1] 马克俭[1] 谢成吉 李梦[1] 

机构地区：[1]贵州大学空间结构研究中心,贵阳550003

出　　处：《工业建筑》2014年第6期130-134,149,共6页Industrial Construction

摘　　要：将正三角形立体管桁架和单层柱面网壳结合起来形成一种新型波浪式屋盖造型的结构体系,可充分发挥两种结构形式的优点。通过分析结构设计的计算结果发现,结构对地震反应较弱,静力计算下结构各杆件的内力均大于多遇地震计算,强度及刚度主要由静力计算决定。在对其进行设计的基础上,分别采用SAP 2000、ANSYS对结构进行动力弹塑性分析、线性屈曲分析和考虑初始缺陷的非线性全过程屈曲分析;在罕遇地震作用下结构只出现少量塑性铰,呈"梁铰破坏"机制,满足延性设计要求,弹塑性位移角均满足规范要求,结构抗震性能良好;在稳定性分析中,结构表现为中部网壳的局部失稳,结构具有较高的稳定承载力。因此结构薄弱部位应在设计中予以加强。The regular triangular spatial trusses and single-layer cylindrical reticulated shells are integrated into a new roof structure of wave shape , which can give full play to the advantages of the two structures .By analyzing the calculation results of structural design , the structure has a weak seismic response , and through the static calculation the internal force of each bar on the structure greater than that under small earthquakes , strength and stiffness is mainly decided by the static calculation .On the basis of design for the new structure , dynamic elastic-plasticity, linear buckling and nonlinear buckling of considering the initial defects are analysed by using SAP 2000 and ANSYS. The structure has a small amount of plastic hinge under rare earthquake , thus presenting “beam hinge failure”mechanism , which satisfies the requirement of ductility design , elastic-plastic displacement angle can satisfy the requirements of the specification , the structure has good anti-seismic performance .The structure shows local buckling in the middle of reticulated shell under stability analysis , and has higher stability bearing capacity .The weak parts of the structure in the design should be strengthened .

关 键 词：立体管桁架 柱面网壳 弹塑性 稳定 

分 类 号：TU399[建筑科学—结构工程]