单层球面网壳新型减震体系整体性能研究
|
摘要
选用60m跨度的空间k6型网壳考虑下部结构和不考虑下部结构两种计算模型进行动力时程分析,讨论两种模型在地震作用下抗震反应的差异,分析不同柱高度参数对网壳结构整体性能的影响,并对考虑下部结构模型布置4种约束屈曲支撑方案进行动力分析。结果表明,单层网壳下部结构的共同作用影响了网壳杆件受力变化规律,不同下部结构对网壳壳体的影响范围也相应变化;网壳下部结构柱高度对网壳结构整体刚度影响较大,柱越高网壳结构整体刚度削弱就越明显;约束屈曲支撑能够有效地控制网壳节点位移响应,效果明显,合理布置约束屈曲支撑有效吸收地震能量,减小网壳结构的地震响应。在考虑下部结构模型布置4种约束屈曲支撑方案中,方案2对主肋节点的水平和竖向位移均有较好的控制效果,主肋节点减震系数达到0.75。
Through the dynamic time interval analysis about a 60m Kiewitt-bom spanned latticed shell with two calculate models,which were with substructure or not,the differences of the sponsor under earthquake was discussed;the influence of different column height to its overall performance was also analysed.It is obvious that seismic action of reticular dome with BRB has been reduced.And after comparing four kinds of buckling-restrained braces arranged to the model with substructure by dynamic analysis,a reasonable arrangement is obtained.
Through the dynamic time interval analysis about a 60m Kiewitt-bom spanned latticed shell with two calculate models,which were with substructure or not,the differences of the sponsor under earthquake was discussed;the influence of different column height to its overall performance was also analysed.It is obvious that seismic action of reticular dome with BRB has been reduced.And after comparing four kinds of buckling-restrained braces arranged to the model with substructure by dynamic analysis,a reasonable arrangement is obtained.
引文
[1]王秀丽,高森,潘霞.四边支撑单层柱面网壳减震体系性能分析[J].兰州理工大学学报,2007,33(2):120-124.
[2]王秀丽,陈祥勇,殷占忠.约束屈曲支撑对K6型球面网壳减震效果的分析[J].甘肃科学学报,2007,19(1):122-126.
[3]薛素铎,王雪生.空间网格结构多维多点随机地震响应分析的高效算法[J].世界地震工程,2004,20(3):43-49.
[4]李永梅,张毅刚.凯威特型索承网壳结构的自振特性及参数分析[J].世界地震工程,2007,23(1):91-97.
[5]陈应波,陈军明.网壳结构与下部结构协同工作的研究[J].华中科技大学学报:自然科学版,2004,32(3):49-53.
[6]陈祥勇.约束屈曲支撑在单层网壳结构中的减震效果分析[D].兰州:兰州理工大学,2006
[7]于晓野,支旭东.单层球面网壳结构的频谱特性分析[J].低温建筑技术,2005,6:65-66.
[8]曹正罡,范峰,沈世钊.k6型单层网壳的弹塑性稳定[J].空间结构,2005,11(3):22-26.
[2]王秀丽,陈祥勇,殷占忠.约束屈曲支撑对K6型球面网壳减震效果的分析[J].甘肃科学学报,2007,19(1):122-126.
[3]薛素铎,王雪生.空间网格结构多维多点随机地震响应分析的高效算法[J].世界地震工程,2004,20(3):43-49.
[4]李永梅,张毅刚.凯威特型索承网壳结构的自振特性及参数分析[J].世界地震工程,2007,23(1):91-97.
[5]陈应波,陈军明.网壳结构与下部结构协同工作的研究[J].华中科技大学学报:自然科学版,2004,32(3):49-53.
[6]陈祥勇.约束屈曲支撑在单层网壳结构中的减震效果分析[D].兰州:兰州理工大学,2006
[7]于晓野,支旭东.单层球面网壳结构的频谱特性分析[J].低温建筑技术,2005,6:65-66.
[8]曹正罡,范峰,沈世钊.k6型单层网壳的弹塑性稳定[J].空间结构,2005,11(3):22-26.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心