结构瞬时输入能量反应持时谱的研究
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摘要
现有抗震设计理论大多是基于承载力或强度的设计方法,与其相应的反应谱理论的最大缺陷是无法反映地震持时的影响,以地震能量作为设计参数的抗震设计理论则有望弥补这一不足。该文在地震瞬时输入能量概念的基础上,利用统计学原理对结构的反应持时提出一种新的定义,用以描述地震波对结构的持时效应,并通过建立相应的持时谱来研究结构动力参数以及地震波特征参数的变化对该持时效应的影响。研究表明:结构阻尼比的增大将使瞬时输入能持时谱的曲线更加平滑,地震波加速度幅值的变化对谱值没有影响,而随着地震波峰值速度与峰值加速度比值的增加,谱值趋于增加。通过总结100条地震波瞬时输入能持时谱曲线的变化规律,提出了阻尼比为5%时的线性单自由度体系瞬时输入能持时谱的简化计算模型,该模型的获得将为结构能量输入历程的预估以及以其为基础的结构损伤历程研究提供必要的基础。
Most of current methods in the aseismic design of structures require the provision of sufficient strength against anticipated seismic effects.The corresponding design response spectra can not reflect the effect of the time duration of an earthquake.The energy based aseismic design is known as an alternative design methodology.A parameter study is carried out on input the duration of the structural energy response based on the momentary input energy and statistical theory,which can reflect the effects of the duration on structures.By establishing the duration of momenary input energy spectra of a linear single degree of freedom(SDOF) system,the effects of the structural dynamic parameters and the characteristics of seismic on the duration were observed.It is found that peak value of the duration of momentary input energy spectrum decreases obviously with damping ratio increase and the changing of peak ground acceleration do not have effects on the duration of momentary input energy spectrum.Based on a total of 100 ground motion records from many significant earthquakes with different peak ground velocities to acceleration(V/A),two parts simple function is suggested according to the shapes of spectra.A simplified model is developed for calculating the duration of momentary input energy spectra to the linear SDOF system with 5% damping.This research conclusion provided a theoretical foundation for more research of the quantization to the cumulative damage in time process based on input energy time histories.
Most of current methods in the aseismic design of structures require the provision of sufficient strength against anticipated seismic effects.The corresponding design response spectra can not reflect the effect of the time duration of an earthquake.The energy based aseismic design is known as an alternative design methodology.A parameter study is carried out on input the duration of the structural energy response based on the momentary input energy and statistical theory,which can reflect the effects of the duration on structures.By establishing the duration of momenary input energy spectra of a linear single degree of freedom(SDOF) system,the effects of the structural dynamic parameters and the characteristics of seismic on the duration were observed.It is found that peak value of the duration of momentary input energy spectrum decreases obviously with damping ratio increase and the changing of peak ground acceleration do not have effects on the duration of momentary input energy spectrum.Based on a total of 100 ground motion records from many significant earthquakes with different peak ground velocities to acceleration(V/A),two parts simple function is suggested according to the shapes of spectra.A simplified model is developed for calculating the duration of momentary input energy spectra to the linear SDOF system with 5% damping.This research conclusion provided a theoretical foundation for more research of the quantization to the cumulative damage in time process based on input energy time histories.
引文
[1]Jeong Garrett D,Iwan Wilfred D.The effect of earthquake duration on the damage of structures[J]Earthquake Engineering and Structural Dynamics,1988,16(8):1201―1211.
[2]Iervolino Iunio,Manfredi Gaetano,Cosenza Edoardo.Ground motion duration effects on nonlinear seismic responses[J].Earthquake Engineering and Structural Dynamics,2006,35(1):21―38.
[3]Trifunac M D,Novikova E I.Duration of strong ground motion in terms of earthquake magnitude epicentral distance,site conditions and site geometry[J].Earthquake Engineering and Structural Dynamics,1994,23(7):1023―1043.
[4]Rutenberg Avigdor,Jennings Paul C,Housner George W.The response of Veterans hospital building41in the San Fernando earthquake[J].Earthquake Engineering and Structural Dynamics,1982,10(3):349―517.
[5]尹保江,黄宗明,白绍良.对地震地面运动持续时间定义的对比分析及改进建议[J].工程抗震,1999,6(2):43―45.Yin Baojiang,Huang Zongming,Bai Shaoliang.Comparison analysis and suggestion of definition of earthquake duration[J].Earthquake Resistant Engineering,1999,6(2):43―45.(in Chinese)
[6]谢礼立,周雍年.地震动记录持时与工程持时[J].地震工程与工程振动,1988,8(3):12―20.Xie Lili,Zhou Yongnian.Ground motion recorded duration and enginee duration[J].Earthquake Engineering and Engineering Vibration,1988,8(3):12―20.(in Chinese)
[7]Uang C M,Bertero V V.Evaluation of seismic energy in structures[J].Earthquake Engineering and Structural Dynamics,1990,19:77―90.
[8]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):71―76.Hu Rongrong,Wang Yayong.A study on relation of instantaneous energy of earthquake strong motion and maximum displacement response of structures[J].Journal of Building Structures,2000,21(1):71―76.(in Chinese)
[9]Hori Norio,Inoue Norio.Damaging properties of ground motions and prediction of maximum response of structures based on momentary energy response[J].Earthquake Engineering and Structural Dynamics,2002,31:1657―1679.
[10]刘哲锋,沈蒲生,胡习兵.地震总输入能量与瞬时输入能量谱的研究[J].地震工程与工程振动,2006,26(6):31―36.Liu Zhefeng,Shen Pusheng,Hu Xibing.Study on input energy and momentary input energy spectra of earthquake strong motion[J].Earthquake Engineering and Engineering Vibration,2006,26(6):31―36.(inChinese)
[11]周云,乐登,邓雪松.设计用地震动总输入能量谱研究[J].工程抗震与加固改造,2008,30(5):1―7.Zhou Yun,Yue Deng,Deng Xuesong.Research on input energy spectra for design of earthquake strong motion[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):1―7.(in Chinese)
[12]曹晖,林学鹏.地震动非平稳特性对结构非线性响应影响的分析[J].工程力学,2006,23(12):30―35.Cao Hui,Lin Xuepeng.The effect of nonstati-onary chaeacteristic of earthquake ground motion on the structural nonlinear response[J].Engineering Mechanics,2006,23(12):30―35.(in Chinese)
[13]Sucuoglu H,Nurtug A.Earthquake ground motion characteristics and seismic energy dissipation[J].Earthquake Engineering and Structural Dynamics,1995,24:1195―1213.
[14]Chopra A K,Chintanapakdee C.Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions[J].Earthquake Engineering and Structural Dynamics,2001,30(12):1769―1789.
[15]Basu Biswajit,Gupta Vinay K.Seismic response of SDOF system by wavelet modeling of nonstationary process[J].Journal of Engineering Mechanics,1998,26(5):1142―1150.
[2]Iervolino Iunio,Manfredi Gaetano,Cosenza Edoardo.Ground motion duration effects on nonlinear seismic responses[J].Earthquake Engineering and Structural Dynamics,2006,35(1):21―38.
[3]Trifunac M D,Novikova E I.Duration of strong ground motion in terms of earthquake magnitude epicentral distance,site conditions and site geometry[J].Earthquake Engineering and Structural Dynamics,1994,23(7):1023―1043.
[4]Rutenberg Avigdor,Jennings Paul C,Housner George W.The response of Veterans hospital building41in the San Fernando earthquake[J].Earthquake Engineering and Structural Dynamics,1982,10(3):349―517.
[5]尹保江,黄宗明,白绍良.对地震地面运动持续时间定义的对比分析及改进建议[J].工程抗震,1999,6(2):43―45.Yin Baojiang,Huang Zongming,Bai Shaoliang.Comparison analysis and suggestion of definition of earthquake duration[J].Earthquake Resistant Engineering,1999,6(2):43―45.(in Chinese)
[6]谢礼立,周雍年.地震动记录持时与工程持时[J].地震工程与工程振动,1988,8(3):12―20.Xie Lili,Zhou Yongnian.Ground motion recorded duration and enginee duration[J].Earthquake Engineering and Engineering Vibration,1988,8(3):12―20.(in Chinese)
[7]Uang C M,Bertero V V.Evaluation of seismic energy in structures[J].Earthquake Engineering and Structural Dynamics,1990,19:77―90.
[8]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):71―76.Hu Rongrong,Wang Yayong.A study on relation of instantaneous energy of earthquake strong motion and maximum displacement response of structures[J].Journal of Building Structures,2000,21(1):71―76.(in Chinese)
[9]Hori Norio,Inoue Norio.Damaging properties of ground motions and prediction of maximum response of structures based on momentary energy response[J].Earthquake Engineering and Structural Dynamics,2002,31:1657―1679.
[10]刘哲锋,沈蒲生,胡习兵.地震总输入能量与瞬时输入能量谱的研究[J].地震工程与工程振动,2006,26(6):31―36.Liu Zhefeng,Shen Pusheng,Hu Xibing.Study on input energy and momentary input energy spectra of earthquake strong motion[J].Earthquake Engineering and Engineering Vibration,2006,26(6):31―36.(inChinese)
[11]周云,乐登,邓雪松.设计用地震动总输入能量谱研究[J].工程抗震与加固改造,2008,30(5):1―7.Zhou Yun,Yue Deng,Deng Xuesong.Research on input energy spectra for design of earthquake strong motion[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):1―7.(in Chinese)
[12]曹晖,林学鹏.地震动非平稳特性对结构非线性响应影响的分析[J].工程力学,2006,23(12):30―35.Cao Hui,Lin Xuepeng.The effect of nonstati-onary chaeacteristic of earthquake ground motion on the structural nonlinear response[J].Engineering Mechanics,2006,23(12):30―35.(in Chinese)
[13]Sucuoglu H,Nurtug A.Earthquake ground motion characteristics and seismic energy dissipation[J].Earthquake Engineering and Structural Dynamics,1995,24:1195―1213.
[14]Chopra A K,Chintanapakdee C.Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions[J].Earthquake Engineering and Structural Dynamics,2001,30(12):1769―1789.
[15]Basu Biswajit,Gupta Vinay K.Seismic response of SDOF system by wavelet modeling of nonstationary process[J].Journal of Engineering Mechanics,1998,26(5):1142―1150.
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