近场地震竖向效应对结构位移的影响
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摘要
基于30组近场地震记录,研究了近场地震竖向效应对结构位移的影响。对6层和10层框架结构算例分别输入每一组近场地震记录进行动力时程分析,时程分析统计结果表明,近场地震竖向效应对框架结构楼层及层间位移具有明显的增大作用,必须引起地震工程界研究、设计人员的高度重视。
Based on 30 sets of acceleration records of near-fault earthquake,the influence of vertical effect of near-fault earthquake on displacement demand of structures was studied.Using each set of near-fault acceleration records,a set of dynamic time-history analyses was carried out to determine the displacement responses of 6 story and 10 story frames,the statistical results show that the vertical effect of near-fault earthquake will remarkably amplify the floor displacement and the inter-story drift demands of frame structures,to which much attention should be paid by the researchers and designers in the field of earthquake engineering.
Based on 30 sets of acceleration records of near-fault earthquake,the influence of vertical effect of near-fault earthquake on displacement demand of structures was studied.Using each set of near-fault acceleration records,a set of dynamic time-history analyses was carried out to determine the displacement responses of 6 story and 10 story frames,the statistical results show that the vertical effect of near-fault earthquake will remarkably amplify the floor displacement and the inter-story drift demands of frame structures,to which much attention should be paid by the researchers and designers in the field of earthquake engineering.
引文
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[16]Kunnath S K,Erduran E,Chai Y H,et al.Effect of Near-FaultVertical Ground Motions on Seismic Response of HighwayOvercrossings[J].Bridge Engineering.2008(13):283-290.
[2]胡庆昌.1995年1月17日日本阪神大地震中神户市房屋结构震害简介[J].建筑结构学报,1995,16(3):10-12.
[3]叶列平,曲哲,马千里,等.从汶川地震中框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-59
[4]Shome N.Probabilistic Seismic Demand Analysis of NonlinearStructures:[dissertation].Stanford:Department of Civil andEnvironmental Engineering of Stanford University[M].1999:1-320.
[5]Bazzurro P.Probabilistic Seismic Demand Analysis[Dissertation].Stanford:Department of Civil and EnvironmentalEngineering of Stanford University[M].1998:1-329.
[6]Kurama Y C,Farrow K T.Ground Motion Scaling Methods forDifferent Site Conditions and Structure Characteristics[J].Earthquake Engineering and Structural Dynamics,2003,32(15):2425-2450.
[7]尹犟,胡其高,李鹏.近场地震作用下的水平及竖向反应谱[J].工业建筑,2013,43(3):57-68.
[8]马千里,叶列平,陆新征,等.采用逐步增量弹塑性时程方法对RC框架结构推覆分析侧力模式的研究[J].建筑结构学报,2008,29(2):132-140.
[9]周文峰,黄宗明,白绍良.约束混凝土几种有代表性应力-应变模型及其比较[J].重庆建筑大学学报,2003,25(4):121-12.
[10]Park R,Kent D C,Sampson R A.Reinforced Concrete Memberswith Cyclic Loading[J].Journal of the Structural Division.1972,98(7):1341-1360.
[11]Park R,Priestley M J N,Gill W D.Ductility of Square-Confined Concrete Columns[J].Journal of Structural Divition,1982,108(4):929-950.
[12]Wang G Q,Zhou X Y,Zhang P Z,et al.Characteristics ofAmplitude and Duration for Near Fault Strong Ground Motion Fromthe 1999 Chi-Chi Taiwan Earthquake[J].Soil Dynamics andEarthquake Engineering,2002,22(1):73-96.
[13]倪永军,朱晞.近断层地震动的加速度峰值比和反应谱分析[J].北方交通大学学报,2004,28(4):1-5.
[14]Bozorgnia Y,Niazi M,Campbell K W.Characteristics of Free-Field Vertical Ground Motion During the Northridge Earthquake[J].Earthquake Spectra,1995,11(4):515-525.
[15]Kikuchi M,Dan K,Yashiro K.Seismic Behavior of a ReinforcedConcrete Building Due to Large Vertical Ground Motions in Near-Source Regions[C]∥Proceedings of the 12th World Conference onEarthquake Engineering.Auckland,New Zealand:New ZealandSociety for Earthquake Engineering,2000:100.1-100.8.
[16]Kunnath S K,Erduran E,Chai Y H,et al.Effect of Near-FaultVertical Ground Motions on Seismic Response of HighwayOvercrossings[J].Bridge Engineering.2008(13):283-290.
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