短程线型单层球面网壳结构在简单荷载作用下的动力稳定性  

Dynamic stability of geodesic single layer reticulated shells under simple loads

作　　者：桂国庆[1,2] 王玉娥[1] 

机构地区：[1]井冈山大学工学院,江西吉安343009 [2]南昌大学建筑工程学院,江西南昌330031

出　　处：《井冈山大学学报（自然科学版）》2009年第1期5-8,共4页Journal of Jinggangshan University (Natural Science)

基　　金：江西省教育厅2006年度科学技术研究项目(赣教技字[2006]260号)

摘　　要：基于全过程时程分析方法,采用实用的动力稳定性判定准则,分析了在三种简单荷载作用下短程线型单层球面网壳结构动力稳定性能。阶跃荷载作用下考虑了初始几何缺陷和阻尼的影响,并对比了阶跃荷载与静力荷载作用下稳定临界值;简谐荷载作用下对比了共振区和非共振区的动力稳定性能;三角形荷载作用下考虑了不同持时的影响。通过不同参数变化对单层网壳结构动力性能的影响分析,得出了一些有意义的结论。According to the full-range time-history analysis method and using a practical dynamic stability behavior determinant criterion,the dynamic stability of geodesic single layer reticulated shells under three types simple loads are considered.When investigating the stability of the shells under step load,the initial geometric imperfection and the structural damping are taken into account and the relationship of geodesic reticulated shells under step loads and static loads is discussed.The dynamic stabilities of the resonance region and off resonance region of shells under harmonic load are analyzed respectively.The dynamic stability of shells under triangle load is analyzed considering the duration of the load.Finally,some meaningful conclusions are obtained by analyzing the influences of various parameters to the dynamic stability of the shells.

关 键 词：短程线型单层球面网壳 动力稳定性 简单荷载 全过程时程分析 

分 类 号：TU399[建筑科学—结构工程]