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
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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.
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.
引文
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[5]郭海山,王林安,沈世钊.水平阶跃荷载作用下单层球面网壳结构的动力稳定性[J].哈尔滨建筑大学学报,2002,35(5):17-22.
[6]林智斌,桂国庆,钱若军.单层球壳结构在简单荷载作用下的动力稳定分析[J].工程力学,2006,23(6):6-10.
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[8]王策,沈世钊.球面网壳阶跃荷载作用动力稳定性[J].建筑结构学报,2001,22(1):62-68.
[9]支旭东,范峰,沈世钊.简谐荷载下单层球面网壳动力失效机理研究[J].地震工程与工程振动,2005,25(4):77-84.
[10]郭海山.单层球面网壳结构动力稳定性及抗震性能研究[D].哈尔滨:哈尔滨工业大学,2002.
[2]陈应波,陈军明,吴代华.网壳结构在地震作用下的动力稳定研究[J].华中科技大学学报:自然科学版,2004,32(10):40-42.
[3]叶继红,沈祖炎.单层网壳在简单荷载下动力稳定分析[J].哈尔滨建筑大学学报,1997,30(1):24-31.
[4]王玉娥.短程线型单层球面网壳结构的动力稳定性研究[D].南昌:南昌大学,2007.
[5]郭海山,王林安,沈世钊.水平阶跃荷载作用下单层球面网壳结构的动力稳定性[J].哈尔滨建筑大学学报,2002,35(5):17-22.
[6]林智斌,桂国庆,钱若军.单层球壳结构在简单荷载作用下的动力稳定分析[J].工程力学,2006,23(6):6-10.
[7]叶继红,沈世钊.竖向阶跃荷载下单层球壳动力失稳临界荷载的确定[J].工业建筑,2005,35(7):77-79.
[8]王策,沈世钊.球面网壳阶跃荷载作用动力稳定性[J].建筑结构学报,2001,22(1):62-68.
[9]支旭东,范峰,沈世钊.简谐荷载下单层球面网壳动力失效机理研究[J].地震工程与工程振动,2005,25(4):77-84.
[10]郭海山.单层球面网壳结构动力稳定性及抗震性能研究[D].哈尔滨:哈尔滨工业大学,2002.
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