多点激励下圆柱面巨型网格结构地震响应分析
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摘要
空间相关性对大跨度空间结构的影响不容忽视。本文采用动力时程分析方法对圆柱面巨型网格结构进行了多点激励下的地震响应分析,并与一致激励下的结构地震响应进行对比,探讨了主体结构单独承载和子结构参与协同承载这2种情况下,不同行波激励对结构关键节点和杆件响应的影响及其变化特点;通过比较分析结构在多点激励和一致激励下的响应差异,得出圆柱面巨型网格结构在地震输入时需考虑多点激励的结论,可供该类结构的抗震设计参考。
In connection with the problem of the significant influence of spatial correlation on the long-span spatial structures,seismic response analyses of cylindrical reticulated mega-structure are made under multiple support excitations by using dynamic time-history method and compared with that under simple support excitations in this paper.The response and its variations of some key nodes and members in the structure are discussed under different traveling-wave excitations in the condition of the main structure bearing the loads by itself and cooperatively with substructures.Response differences between multiple support excitations and simple support excitations prove that the analyses of multiple support excitations of reticulated mega-structure are necessary under earthquake inputting,which provide theoretic references to the seismic design of such structures.
In connection with the problem of the significant influence of spatial correlation on the long-span spatial structures,seismic response analyses of cylindrical reticulated mega-structure are made under multiple support excitations by using dynamic time-history method and compared with that under simple support excitations in this paper.The response and its variations of some key nodes and members in the structure are discussed under different traveling-wave excitations in the condition of the main structure bearing the loads by itself and cooperatively with substructures.Response differences between multiple support excitations and simple support excitations prove that the analyses of multiple support excitations of reticulated mega-structure are necessary under earthquake inputting,which provide theoretic references to the seismic design of such structures.
引文
[1]李忠献,林伟,丁阳.行波效应对大跨度空间网格结构地震响应的影响[J].天津大学学报,2007,40(1):1- 8. Li Z X,Lin W,Ding Y.Influence of wave passage effect on seismic responses of long-span spatial lattice stuctures[J].Journal of Tianjin University,2007,40 (1):1-8.
[2]李忠献,林伟,丁阳.大跨度空间网格结构多维多点随机地震反应分析[J].地震工程与工程振动,2006, 26(1):56-63. Li Z X,Lin W,Ding Y.Random seismic response analysis of long-span spatial lattice structure under three-dimensional and multi-support earthquake excitations [J].Earthquake Engineering and Engineering Vibration,2006,26(1):56-63.
[3]潘旦光,楼梦麟,范立础.多点输入下大垮度结构地震反应分析研究现状[J].同济大学报,2001,29(10): 1213-1219. Pan D G,Lou M L,Fan L C.Status of seismic response analysis of long-span structures under multiple support excitations[J].Journal of Tongji University, 2001,29(10):1213-1219.
[4]全伟,李宏男.大跨结构多维多点输入抗震研究进展??[J].防灾减灾工程学报,2006,26(3):343-351. Quan W,Li H N.State-of-the-art review on multi-component multi-support seismic response analysis of long-span structures[J].Journal of Disaster Prevention and Mitigation Engineering,2006,26(3):343- 351.
[5]贺拥军,周绪红,董石麟.膜型网壳巨型网格结构的整体与局部稳定性研究[J].土木工程学报,2005,38(2): 13-21. He Y J,Zhou X H,Dong S L.Research of overall and local stability of reticulated mega-structure with single layer membranous latticed shell substructure [J].China Civil Engineering Journal,2005,38(2): 13-21.
[6]贺拥军,周绪红,董石麟.圆柱面巨型网格结构地震响应时程分析[J].湖南大学学报(自然科学版),2005,32 (3):41-46. He Y J,Zhou X H,Dong S L.Research on the seismic response behavior of cylindrical latticed-intersected three-dimensional beam system reticulated mega-structure by the time-history method[J].Journal of Hunan University(Natural Sciences),2005,32(3): 41-46.
[7]陈幼平,周宏业.斜拉桥地震反应的行波效应[J].土木工程学报,1996,29(6):61-68. Chen Y P,Zhou H Y.Seismic behavior of cable-stayed bridges under traveling wave excitation[J]. China Civil Engineering Journal,1996,29(6):61-68.
[8]Hao H,Duan X N.Multiple excitation effects on response of symmetric buildings[J].Engineering Structures, 1996,18(6):723-740.
[2]李忠献,林伟,丁阳.大跨度空间网格结构多维多点随机地震反应分析[J].地震工程与工程振动,2006, 26(1):56-63. Li Z X,Lin W,Ding Y.Random seismic response analysis of long-span spatial lattice structure under three-dimensional and multi-support earthquake excitations [J].Earthquake Engineering and Engineering Vibration,2006,26(1):56-63.
[3]潘旦光,楼梦麟,范立础.多点输入下大垮度结构地震反应分析研究现状[J].同济大学报,2001,29(10): 1213-1219. Pan D G,Lou M L,Fan L C.Status of seismic response analysis of long-span structures under multiple support excitations[J].Journal of Tongji University, 2001,29(10):1213-1219.
[4]全伟,李宏男.大跨结构多维多点输入抗震研究进展??[J].防灾减灾工程学报,2006,26(3):343-351. Quan W,Li H N.State-of-the-art review on multi-component multi-support seismic response analysis of long-span structures[J].Journal of Disaster Prevention and Mitigation Engineering,2006,26(3):343- 351.
[5]贺拥军,周绪红,董石麟.膜型网壳巨型网格结构的整体与局部稳定性研究[J].土木工程学报,2005,38(2): 13-21. He Y J,Zhou X H,Dong S L.Research of overall and local stability of reticulated mega-structure with single layer membranous latticed shell substructure [J].China Civil Engineering Journal,2005,38(2): 13-21.
[6]贺拥军,周绪红,董石麟.圆柱面巨型网格结构地震响应时程分析[J].湖南大学学报(自然科学版),2005,32 (3):41-46. He Y J,Zhou X H,Dong S L.Research on the seismic response behavior of cylindrical latticed-intersected three-dimensional beam system reticulated mega-structure by the time-history method[J].Journal of Hunan University(Natural Sciences),2005,32(3): 41-46.
[7]陈幼平,周宏业.斜拉桥地震反应的行波效应[J].土木工程学报,1996,29(6):61-68. Chen Y P,Zhou H Y.Seismic behavior of cable-stayed bridges under traveling wave excitation[J]. China Civil Engineering Journal,1996,29(6):61-68.
[8]Hao H,Duan X N.Multiple excitation effects on response of symmetric buildings[J].Engineering Structures, 1996,18(6):723-740.
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