超长钢屋盖多维多点输入的地震响应分析
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(1 同济大学建筑工程系，上海 200092；2 中国建筑西南设计研究院有限公司，成都 610041；3 上海同清科技发展有限公司，上海 200042)［摘要］ 采用时程分析法对某超长钢屋盖进行了考虑行波效应的多维多点输入下的地震响应分析，考察了多维多点输入对结构的基底剪力、扭转效应和构件内力的影响，探讨了结构地震响应规律与地震波传播速度的关系。研究结果表明：随着地震波传播速度的减小，多维多点输入下结构的基底剪力逐渐减小而扭转效应逐渐增大；不同类型的钢屋盖构件受多维多点输入影响程度不同，其中纵向桁架弦杆的响应最大，横向桁架弦杆的响应最小。不同类型构件的行波效应影响系数主要分布在1.17~1.51之间。［关键词］超长钢屋盖; 行波效应; 多维多点; 时程分析中图分类号：TU311.3 文献标识码：A 文章编号：1002-848X(2014)21-0051-06Seismic response analysis of a super-long steel roof under multi-dimension and multi-support excitationLuo Xiaolong1,2, Tong Lewei1, Gao Yonggang3, Zhu Fuhua3(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610041, China; 3 Shanghai Topking Science and Technology Development Co., Ltd., Shanghai 200042, China)Abstract: Time-history seismic analysis of a super-long steel roof structure is carried out considering traveling wave effect under multi-dimension and multi-support excitation. The effect of multi-dimension and multi-support excitation was investigated on the total base shear force, torsion effect and internal force of steel members. The relationship between seismic response of the structure and seismic wave velocity was discussed. The research results show that under multi-dimension and multi-support excitation, the total base shear force decreases, but the torsion effect increases, as the travelling wave velocity becomes slow. Multi-dimension and multi-support excitation has different influence on different types of structural members in the steel roof. The response of the chords in the longitudinal truss is the largest while the response of the chords in the lateral truss is the smallest. The traveling wave effect coefficients of the different types of members are mainly between 1.17and 1.51.Keywords: super-long steel roof; traveling wave effect; multi-dimension and multi-support; time-history analysis作者简介：罗小龙，硕士，Email: lxl163yx@163.com。参考文献[1]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.[2]建质[2010]109号 超限高层建筑工程抗震设防专项审查技术要点 [S]. 2010.[3]周定松,肖克艰,陈志强.成都双流国际机场T2航站楼大厅多点多维弹性地震反应分析[J].建筑结构,2010，40(9): 14-19.[4]王文渊,张同亿,李云,等.石家庄国际会展中心地震动多点输入研究[J]. 建筑结构, 2013,43(3): 36-39.[5]李永华,李思明.多维多点激励下某多塔连体结构地震反应分析[J].土木工程学报, 2011, 44(4): 98-104.[6]张胜,甘明,李华峰.南京南站钢结构的弹塑性与多点多维地震输入分析[J]. 建筑结构, 2009, 39(12): 79-82.[7]甄伟,李志东,高昂,等.广州新客站结构多点输入地震反应分析[J]. 建筑结构, 2009, 39(12): 28-32.[8]ZERVA A. Response of multi-span beams to spatially incoherent seismic ground motions [J].Earthquake Engineering & Structural Dynamic,1990,19(6):819-832.[9]DER KIUREGHIAN ARMEN, NEUENHOFER ANSGAR. Response spectrum method for multi-support seismic excitations [J]. Earthquake Engineering & Structural Dynamic, 1992, 21(8): 713-740.[10]李吉涛,杨庆山. 地震波基线漂移的处理方法[J]. 北京交通大学学报：自然科学版,2010,34(1):95-99.[11]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):350-360.
