竖向地震下超高层建筑结构的简化波动分析
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摘要
为研究近断层地区竖向地震下超高层建筑结构的脉冲波动效应,将典型超高层建筑结构体系分别简化为一维和二维模型,在弹性范围内,确定纵波通过集中质量的反射和透射系数,以时域差分延时和FFT频域滤波为求解策略,用简化波动分析方法计算结构在竖向地震下的宏观响应,评估结构在竖向地震下的抗震性能.分析表明,与振动分析方法相比,波动分析方法在计算结构竖向地震响应时更具有针对性,特别是近场脉冲型竖向地震下.竖向地震引起轴向构件的轴力波动和相对错动不容忽视.
To study the impulse wave effect of high-rise buildings under vertical earthquake near fault region,simplified wave propagation method is adopted.In elastic range,typical structural system is simplified as one and two dimensional model,and reflection and transmission coefficients of longitudinal wave through lumped mass are determined.Structural vertical seismic macro response is calculated by simplified wave propagation method in which difference time delay and FFT filter are used.The analysis shows that,compared with the vibration method,the wave propagation method is more targeted in calculating structural vertical seismic response,especially under impulse-type vertical earthquake.The axial force fluctuation and relative movement caused by vertical earthquake can not be ignored.
To study the impulse wave effect of high-rise buildings under vertical earthquake near fault region,simplified wave propagation method is adopted.In elastic range,typical structural system is simplified as one and two dimensional model,and reflection and transmission coefficients of longitudinal wave through lumped mass are determined.Structural vertical seismic macro response is calculated by simplified wave propagation method in which difference time delay and FFT filter are used.The analysis shows that,compared with the vibration method,the wave propagation method is more targeted in calculating structural vertical seismic response,especially under impulse-type vertical earthquake.The axial force fluctuation and relative movement caused by vertical earthquake can not be ignored.
引文
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[13]TODOROVSKA M I,IVANOVIC S S,TRIFUNAC M D.Wave propagation in a seven-story reinforced concrete building I:Theoretical models[J].Soil Dynamics and Earthquake Engineering,2001,21:211-223.
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[15]肖诗云,林皋,王哲,等.应变率对混凝土抗拉特性影响[J].大连理工大学学报,2001,41(6):721-725.
[16]FU H C,ERKI M A,SECKIN M.Review of effects of loading rate on concrete in compression[J].Journal of Structural Engineering,ASCE,1991,117(12):3645-3659.
[17]Commite euro-international du beton.CEB-FIP MODEL CODE[S].London:T.Telford,1993.
[18]张昊强,何政.竖向脉冲激励作用下结构简化波动分析之反射与透射系数[J].工程力学,2013,30(7):153-160.
[19]THOMSON W T.Theory of vibration with applications[M].北京:清华大学出版社,2005.
[2]黄吉锋,邵弘,杨志勇.复杂建筑结构竖向地震作用的振型分解反应谱分析[J].建筑结构学报,2009,增刊1:110-114.
[3]石文龙,孙飞飞,李国强.某多塔连体高层建筑的竖向地震反应分析[J].建筑结构,2007,34(8):65-69.
[4]HAYASI P,MASUDA Y,HASHIMOTO S,et al.Photoelastic analysis of stress waves in building subjected to vertical impact under laboratory earthquake experiments[J].International Journal of Impact Engineering,2009,36:1150-1155.
[5]贾俊峰,欧进萍.近断层竖向地震动对斜拉桥地震反应的影响[J].土木建筑与环境工程,2010,32(增刊2):189-191.
[6]周靖,周飞,蔡健,等.脉冲型竖向地震作用下大跨度RC带腋撑框架结构弹塑性动力响应分析[J].工程力学,2010,27(6):113-119.
[7]LI D S,LI H N,REN L,et al.Time delay of earthquake excitation in high-rise building[C]//Earth and Space2010:Engineering,Science,Construction,and Operation in Challenging Environments.Hawaii:[s.n.],2010:3416-3426.
[8]KOHLER M D,HEATON T H,BRADFORD S C.Propagating waves in the steel,moment-frame factor building recorded during earthquakes[J].Bulletin of Seismological Society of America,2007,97(4):1334-1345.
[9]TODOROVSKA M I,IVANOVI S S,TRIFUNAC M D.Wave propagation in a seven-story reinforced concrete building II:Observed wavenumbers[J].Soil Dynamics and Earthquake Engineering,2001,21:225-236.
[10]DESMOND T P.Theoretical and experimental investigation of stress waves at a junction of three bars[J].Journal of Applied Mechanics,1999,48(1):148-154.
[11]ZHANG R R,SNIEDER R,GARGAB L,et al.Modeling of seismic wave motion in high-rise buildings[J].Probabilistic Engineering Mechanics,2011,26(4):520-527.
[12]SAFAK E.Propagation of seismic waves in tall buildings[J].The Structural Design of Tall Building,1998,7(4):295-306.
[13]TODOROVSKA M I,IVANOVIC S S,TRIFUNAC M D.Wave propagation in a seven-story reinforced concrete building I:Theoretical models[J].Soil Dynamics and Earthquake Engineering,2001,21:211-223.
[14]LI M,LI H N.Effects of strain rate on reinforced concrete structure under seismic loading[J].Advances in Structural Engineering,2012,12(3)465-475.
[15]肖诗云,林皋,王哲,等.应变率对混凝土抗拉特性影响[J].大连理工大学学报,2001,41(6):721-725.
[16]FU H C,ERKI M A,SECKIN M.Review of effects of loading rate on concrete in compression[J].Journal of Structural Engineering,ASCE,1991,117(12):3645-3659.
[17]Commite euro-international du beton.CEB-FIP MODEL CODE[S].London:T.Telford,1993.
[18]张昊强,何政.竖向脉冲激励作用下结构简化波动分析之反射与透射系数[J].工程力学,2013,30(7):153-160.
[19]THOMSON W T.Theory of vibration with applications[M].北京:清华大学出版社,2005.
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