摘要
为了对跨度为60 m的K8型单层球面网壳进行了减震分析,分别将结构的支座设置成弹性支座和弹性阻尼支座,对结构进行减震控制.结合对结构在有控和无控状态下自振特性的分析,阐述了单层球面网壳结构的减震控制原理.在常遇地震作用下,得到网壳结构的最大水平位移、减震支座的最大水平位移、最大支座反力和最大杆件内力.通过改变支座的刚度和阻尼系数,对两种减震方案的减震效果进行比较.研究结果表明:两种减震装置均有效地控制了K8型单层球面网壳结构的支座反力,弹性阻尼支座还可以明显地降低减震支座的水平位移.
The vibration reduction analysis was carried out for K8 single-layer reticulated domes, in which all horizontal pin supports were changed as spring supports or damped spring supports, respectively. The differences of frequencies and the vibration modes between uncontrolled and controlled structures were studied in order to illustrate the vibration reduction mechanism of the reticulated domes. The maximum horizontal displacement, the maximum reactions at supports and the internal forces of the reticulated domes were calculated under frequent earthquakes. The results indicate that two kinds of vibration reduction techniques can control the reactions of this kind of reticulated dome effectively. Damped spring supports can also reduce the displacements at those horizontal supports significantly.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2009年第4期7-11,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金重大研究计划重点资助项目(90715034)
哈尔滨工业大学优秀青年教师培养计划资助项目(HITQNJS.2007.029)
关键词
单层球面网壳
地震作用
减震控制
减震支座
single-layer reticulated dome
seismic action
vibration reduction control
vibration reduction support
作者简介
于志伟（1982-），男，博士研究生；yuzhiwei_2008@sina．com
范峰（1971-），男，教授，博士生导师；
沈世钊（1933-），男，教授，博士生导师．
