地震作用下单层球面网壳结构的动力稳定性  

Dynamic stability of single-layer reticulated domes under earthquake excitation

作　　者：郭海山[1] 钱宏亮[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《地震工程与工程振动》2003年第1期31-37,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重大资助项目(59895410.5.3)

摘　　要：本文以具有实际工程意义的40m跨度K8型单层球面网壳结构为研究对象,研究了其在地震作用下的动力失稳特点,提出了动力稳定性判别方法。系统分析了各种因素对网壳结构动力稳定性临界荷载的影响,其中包括:水平地震作用、竖向地震作用和三向地震作用的影响;考虑材料弹塑性的影响;不同地震输入的影响;初始几何缺陷的影响;不同矢跨比和不同杆件截面的影响。Dynamic stability of singlelayer reticulated domes under earthquake excitation is discussed. A practical method for researching dynamic stability of singlelayer reticulated domes is put forward. A comprehensive numerical analysis on dynamic stability behavior of some prototype single layer reticulated domes is carried out with the following primary parameters: combinations of vertical and horizontal earthquake action; different constitutive relation of steel; various geometric and structural parameters, such as risetospan ratios, crosssectional areas of members and initial geometric imperfection. Some conclusions worthy to be noted are drawn.

关 键 词：单层球面网壳结构 动力稳定性 地震作用 地震作用 矢跨比 弹塑性 

分 类 号：TU352.11[建筑科学—结构工程] TU311.3