空间网架结构随机地震动激励下的响应分析
|
摘要
以上海大众仪征五厂的车身车间网架结构为研究对象,采用随机振动法,分别对结构进行独立的3向正交随机地震动激励作用下的动力响应分析.结果表明:该结构具有振型密集、频率变化均匀的特点,在地震动激励作用下可能首先发生扭曲破坏;在水平方向的随机地震动激励作用下,虽然结构整体安全,但是其下弦中的几根杆件发生破坏以及上弦中1号截面杆件的拉压应力值较大.在x和y方向的随机地震动激励作用下,上弦和下弦中1号截面杆件产生的拉压应力值的差值较大,其它截面的杆件应力值的差值较小.
Taking the grid structures of the car body workshop of Shanghai Volkswagen's Yizheng fifth factory as research object and using random vibration method,the dynamic responses of the grid structures were analysed under independent three orthogonal random seismic excitations.Analysis results indicate:the structure is characterized by high density vibration modes and uniform frequency varation,which may at first be twisted and destroyed under seismic excitation.Under horizontal random seismic excitations,a few bars at the bottom chord will fail and the draw-press stress of No.1 cross-section bar at the upper chord will be relatively great,though the whole structure is safe.Under random seismic excitations in x and y direction,the draw-press stresses of No.1 cross-section bars at upper bottom chord have a great difference,while the other section bars' stresses are of little diversity between each other.
Taking the grid structures of the car body workshop of Shanghai Volkswagen's Yizheng fifth factory as research object and using random vibration method,the dynamic responses of the grid structures were analysed under independent three orthogonal random seismic excitations.Analysis results indicate:the structure is characterized by high density vibration modes and uniform frequency varation,which may at first be twisted and destroyed under seismic excitation.Under horizontal random seismic excitations,a few bars at the bottom chord will fail and the draw-press stress of No.1 cross-section bar at the upper chord will be relatively great,though the whole structure is safe.Under random seismic excitations in x and y direction,the draw-press stresses of No.1 cross-section bars at upper bottom chord have a great difference,while the other section bars' stresses are of little diversity between each other.
引文
[1]董石麟.中国空间结构的发展与展望[J].建筑结构学报,2010,31(6):39-50.
[2]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报,2001,29(10):1213-1219.
[3]白凤龙,李宏男.地震动多点激励下大跨度空间网架结构的反应分析[J].工程力学,2010,27(7):67-73.
[4]甘明,张胜.空间结构抗震、抗风设计审查要点介[J].建筑结构,2009,39(12):106-110.
[5]林家浩,张亚辉,赵岩.大跨度结构抗震分析方法及近期进展[J].力学进展,2001,31(3):350-358.
[6]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):57-62.
[7]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.140-141.
[8]Zhang Y H,Li Q S,Lin J H,et al.Random vibrationanalysis of long-span structures subjected to spatiallyvarying ground motions[J].Soi Dynamics andEarthquake Engineering,2009,29(4):620-629.
[9]Wei Gao.Random seismic response analysis of trussstructures with uncertain parameters[J].EngineeringStructures,2007,29:1487-1498.
[10]薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10.
[11]中华人民共和国建设部,中华人民共和国国家质量监督检验检疫总局.GB50009-2001建筑结构载荷规范[S].北京:中国建筑工业出版社,2006.
[12]约翰.-奇尔顿.空间网格结构[M].高立人,译.北京:中国建筑工业出版社,2004.
[13]Nafday A M.System safety performance metrics forskeletal structures[J].Journal of StructuralEngineering,2008,134(3):499-504.
[14]沈顺高,张微敬,朱丹,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.
[2]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报,2001,29(10):1213-1219.
[3]白凤龙,李宏男.地震动多点激励下大跨度空间网架结构的反应分析[J].工程力学,2010,27(7):67-73.
[4]甘明,张胜.空间结构抗震、抗风设计审查要点介[J].建筑结构,2009,39(12):106-110.
[5]林家浩,张亚辉,赵岩.大跨度结构抗震分析方法及近期进展[J].力学进展,2001,31(3):350-358.
[6]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):57-62.
[7]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.140-141.
[8]Zhang Y H,Li Q S,Lin J H,et al.Random vibrationanalysis of long-span structures subjected to spatiallyvarying ground motions[J].Soi Dynamics andEarthquake Engineering,2009,29(4):620-629.
[9]Wei Gao.Random seismic response analysis of trussstructures with uncertain parameters[J].EngineeringStructures,2007,29:1487-1498.
[10]薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10.
[11]中华人民共和国建设部,中华人民共和国国家质量监督检验检疫总局.GB50009-2001建筑结构载荷规范[S].北京:中国建筑工业出版社,2006.
[12]约翰.-奇尔顿.空间网格结构[M].高立人,译.北京:中国建筑工业出版社,2004.
[13]Nafday A M.System safety performance metrics forskeletal structures[J].Journal of StructuralEngineering,2008,134(3):499-504.
[14]沈顺高,张微敬,朱丹,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.
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