摘要
采用基于B-R运动准则的改进判别方法,结合结构时程响应曲线判定弦支穹顶结构的动力稳定性,研究拉索预应力、矢跨比对弦支穹顶动力稳定性能的影响。算例分析研究表明,在动力荷载作用下存在一组最优预应力,此时结构动力稳定临界荷载较大;在不同预应力作用下,随着矢跨比增大,结构临界荷载增大;在同一预应力作用下,随着矢跨比增大,结构临界荷载增大但幅度很小。
Based on B-R criteria,combined the method and time history response curves,the dynamic stability of suspen-domes was judged.The dynamic stability characteristics with different pre-stress values were analyzed under three-dimensional seismic excitation.The numerical results show that there is a group of optimal pre-stresses under which the critical dynamic load of the structure is higher;Under different pre-stress,the critical dynamic load of the structure increases with the increase of the ratio of rise to ...
出处
《建筑结构》
CSCD
北大核心
2009年第7期23-26,共4页
Building Structure
基金
世博场馆大空间结构安全保障关键技术(05dz05812)
关键词
弦支穹顶
预应力
临界荷载
动力稳定
suspen-dome
pre-stress
critical load
dynamic stablity
