浦东机场(二期)候机楼水平多点地震输入下的空间相干效应分析
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摘要
本文研究了上海浦东机场(二期)候机楼在地震波为上海地表波的多点输入下的结构位移和轴力反应,并比较了该结构在地震波为El Centro波的一致输入下的结构位移和轴力反应值之间的差异。通过屋面空间结构有代表意义的节点位移和杆件轴力的计算结果比较,探讨了这些节点和杆件的相关物理量在地震多点输入下的变化规律,得出了一些有工程实践意义的结论:(1)在上海地表波和El Centro波一致水平输入下,无论结构的位移还是轴力反应均差别不大;2)多点地震输入所得的结构位移反应约为一致输入下的结构位移反应的1.1-1.5倍左右;(3)多点地震输入所得的结构位移反应约为一致输入下的结构位移反应的1.6倍左右。
The difference between the seismic responses of displacement and axial force of Pudong Airport Terminal(Ⅱ) Shanghai obtained from uniform excitation(seismic wave: El Centro) and multi-support excitation(seismic wave: Shanghai ground wave)is studied.By comparing the responses of the displacement of the representative nodes and axial forces of members of the space structure roof,the changing rules of the respective physical variables of those nodes and members under the action effect of seismic multi-support excitation are studied.Some conclusions for engineering practice are drawn:(1) under horizontal seismic excitation of El Centro wave and Shanghai ground wave the difference of the responses of the displacement or axial forces of the structure is not large;(2) the responses of the displacement(by multi-support excitation) is 1.1-1.5 multiple to that by uniform excitation;(3) the responses of axial forces(by multi-support excitation) is about 1.6 multiple to that by uniform excitation.
The difference between the seismic responses of displacement and axial force of Pudong Airport Terminal(Ⅱ) Shanghai obtained from uniform excitation(seismic wave: El Centro) and multi-support excitation(seismic wave: Shanghai ground wave)is studied.By comparing the responses of the displacement of the representative nodes and axial forces of members of the space structure roof,the changing rules of the respective physical variables of those nodes and members under the action effect of seismic multi-support excitation are studied.Some conclusions for engineering practice are drawn:(1) under horizontal seismic excitation of El Centro wave and Shanghai ground wave the difference of the responses of the displacement or axial forces of the structure is not large;(2) the responses of the displacement(by multi-support excitation) is 1.1-1.5 multiple to that by uniform excitation;(3) the responses of axial forces(by multi-support excitation) is about 1.6 multiple to that by uniform excitation.
引文
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[2]Shen S Z.The development of spatial structures in China(Invited Report)[C]//IASS Asia-Pacific Conference on Shell and Spatial SpatialStructures,Beijing,1996.
[3]Makowski Z S.Space Structure-A Review of Development in Last Decade[M].Space Structure IV,London,1993.
[4]蓝天.空间钢结构的应用与发展[J].建筑结构学报,2001,22(4):10-14.
[5]蓝天.空间结构的十年——从中国看世界[C]//第六届空间结构学术会议论文集.广州:1992.
[6]Clough R W,Penzien J.Dynamics of Structures[M].New York:McGraw-Hill,1975.
[7]屈铁军,王前信.多点输入地震反应分析研究的进展[J]。世界地震工程,1993,13(1):30-36.
[8]楼梦麟,林清.古河道对工程场地地震动参数的影响[J].震灾防御技术.2008,3(4):421-428.
[9]楼梦麟,黄明开.上海浦东机场(二期)候机楼水平地震行波效应时程分析[J].建筑结构,2009,39(2):8-11.
[10]黄明开,楼梦麟.浦东机场候机楼竖向地震行波效应时程分析[J].地震工程与工程振动,2009,29(3):15-21.
[11]林家浩,钟万勰,张亚辉.大跨度结构抗震计算的随机振动方法[J].建筑结构学报,2000,21(1):29-36.
[12]李建俊.随机地震响应分析的虚拟激励法[D].大连:大连理工大学工程力学研究所,1994.
[13]薛素铎,王雪生,曹资.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):9-13.
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