不规则空间网状钢结构弹塑性动力时程分析  

NONLINEAR DYNAMIC ELASTO-PLASTIC TIME HISTORY ANALYSIS OF IRREGULAR SPACE NETTY STEEL STRUCTURE

作　　者：舒兴平[1] 周垒淇 卢倍嵘[2] 袁智深[3] 

机构地区：[1]湖南大学土木工程学院钢结构研究所,长沙410082 [2]湖南科技大学土木工程学院,湖南湘潭411201 [3]中南林业科技大学土木工程与力学学院,长沙410004

出　　处：《工业建筑》2015年第9期161-166,共6页Industrial Construction

基　　金：国家自然科学基金项目(51278178)

摘　　要：以某不规则空间网状结构为研究对象,利用有限元软件SAP 2000建立弹塑性分析模型。按目标反应谱进行选波的方法,选取2组天然地震波及1组人工地震波,根据三维三向地震波激励的输入原则设置12种工况,并对不规则空间网状钢结构在罕遇地震作用下的弹塑性动力时程进行分析。结果表明:结构的整体刚度较大,在9度罕遇地震作用下最大位移值小于位移限值。结构出现的塑性铰较少,主要分布在相对较薄弱的中心圆环处,少数构件出现轻微损坏。结构达到预定的抗震性能目标,具有良好的抗震能力。Based on a irregular space netty steel structure, SAP 2000 was used to establish the elasto-plastic finite element model. The seismic wave input motion included 2 sets of natural earthquake waves and 1 set of artificial waves by means of target response spectrum selection, and 12 loading cases were set based on three-dimensional and three-way seismic wave input, and then it was done the dynamic elasto-plastic time-history analysis of the structure under rare earthquake. The results showed that the whole rigidity of the structure was larger, and under a rare earthquake 9, the maximum displacement was less than the limit value. A few plastic hinges were formed, and mainly distributed in the center circle which was relatively weak, and slight damage occurred in a few members, indicating that the design of the irregular space hetty steel structure achieved the earthquake performance objectives and had ideal seismic behavior.

关 键 词：不规则空间网状结构 弹塑性 动力时程分析 抗震性能 

分 类 号：TU399[建筑科学—结构工程] TU352.11