摘要
网架结构是杆件按照一定的规律布置,通过节点连接而成的网格状空间杆系结构。网架结构由处在两个平面内的杆件组成,形成平行的上弦与下弦,其间以腹杆与竖杆相连。目前,网架结构的抗震分析方法主要有振型分解反应谱法、随机振动方法和动力时程分析法。利用结构有大型限元分析软件SAP2000对三个不同跨度的正放四角锥网架结构进行分析,研究了网架的跨度的变化对自振特性及杆件内力的影响。
Grid structure is a member disposed according to the certain rule, the grid space truss structure connected by nodes. Grid structure is in the two plane rod parts, forming up-per and lower parallel, during which the ventral rod and the ver-tical rod. At present, the seismic analysis method of space truss structure mainly has the mode decomposition response spectrum method, the random vibration method and the time history analy-sis method. The structure analysis software SAP2000 on three different span is four square pyramid space grid structure analysis of large finite element, to study the influence of grid span on self vibration characteristics and internal forces of rod.
出处
《四川建材》
2014年第1期37-38,共2页
Sichuan Building Materials
关键词
网架结构
动内力系数
抗震性能
grid structure
aerodynamic force coefficient
seismic performance
