多点输入下大跨输电单塔和塔线体系抗震性能分析
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摘要
为了分析多点输入下大跨越输电单塔和塔线体系结构响应的差异,采用时程分析法系统地分析了多点输入下其地震响应,从节点最大位移、结构最大扭转角、杆件最大轴力和基底剪力等方面找出了2种结构体系地震响应的差异.通过分析可知,单塔和塔线体系结构响应存在较大的差异,且其差异与其所处的位置有关,并且与视波速的变化有关.因此对于大跨输电塔结构,应该考虑塔和线的耦合作用,在进行抗震分析建模时应采用塔线体系模型,否则得出的结论将偏于保守或偏于危险.
The seismic response of long crossing transmission single tower and tower-line system were systematically studied to find the difference between single tower and tower-line system under multiple support excitation by time history analysis method.The response difference between the single tower and tower-line system was investigated through the max node displacement,torsion,axial force and the base shear force.The results show that the seismic response difference of the single tower and tower-line system is significant,and the difference is relative to the nodes location and apparent wave velocity.So for long crossing transmission tower the the coupling of the tower and line should be considered when it is modeled for seismic analysis under multiple support excitation,otherwise those results will be over-safety or over-dangerous.
The seismic response of long crossing transmission single tower and tower-line system were systematically studied to find the difference between single tower and tower-line system under multiple support excitation by time history analysis method.The response difference between the single tower and tower-line system was investigated through the max node displacement,torsion,axial force and the base shear force.The results show that the seismic response difference of the single tower and tower-line system is significant,and the difference is relative to the nodes location and apparent wave velocity.So for long crossing transmission tower the the coupling of the tower and line should be considered when it is modeled for seismic analysis under multiple support excitation,otherwise those results will be over-safety or over-dangerous.
引文
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[2]胡大柱.地震作用下输电铁塔破坏模式分析[D].沈阳:沈阳建筑工程学院,2004:48-51.HU Da-zhu.Failure mode analysis of the transmissiontower subjected to earthquake action[D].Shenyang:Shenyang Jianzhu University,2004:48-51.
[3]曹枚根,徐忠根,何运祥.钢管组合大跨越输电塔导地线耦合效应研究[J].中国电力,2006,39(12):36-39.CAO Mei-gen,XU Zhong-gen,HE Yun-xiang.Re-search on cables coupled effect of combo steel tube towerfor large crossing transmission lines[J].Electric Pow-er,2006,39(12):36-39.
[4]YASUI H,MARUKAWA H,MOMOMURA Y,et al.Analytical study on wind-induced vibration of powertransmission towers[J].Wind Eng Ind Aerodyn,1999,83(2):431-441.
[5]GHOBARAH A,AZIZ T S,GHOBARAH A,et al.Response of transmission lines to multiple support exci-tations[J].Eng Struct,1996(18):936-946.
[6]LI Hong-nan,WANG Qian-xin,SINGH M P.Seismicresponse analysis method for coupled system of trans-mission lines and towers,PartⅡ:in plane[J].Earth-quake Eng And Eng Vibr,1996,16(4):37-45.
[7]LI Hong-nan,WANG Qian-xin,SINGH MP.Seismicresponse analysis method for coupled system of trans-mission lines and towers,Part I:out of plane[J].Earth-quake Eng And Eng Vibr,1996,16(9):67-72.
[8]杨付刚,胡启平,孙建梅.多点输入下大跨越输电塔结构抗震性能时程分析[J].电力建设,2010,31(4):1-4.YANG Fu-gang,HU Qi-ping,SUN Jian-mei.Seismicbehaviour analysis of long crossing transmission towerunder multiple support excitation[J].Electric PowerConstruction,2010,31(4):1-4.
[9]刘枫,肖从真,徐自国,等.首都机场3号航站楼多维多点输入时程地震反应分析[J].建筑结构学报,2006,27(5):56-63.LIU Feng,XIAO Cong-zhen,XU Zi-guo,et al.Time-his-tory analysis of terminal 3 of the Capital Airport undermulti-support and multi-dimension seismic excitation[J].Journal of Building Structures,2006,27(5):56-63.
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