随机地震模型及反应谱分析
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摘要
本文以实际地震加速度的频谱特性和相位谱特性为依据,仿概率统计理论中的高斯概率密度函数,建立了随机地震加速度频谱数学模型。通过选用不同的模型参数,用自编的程序进行大量的计算,得到了具有不同特性的随机地震加速度反应谱曲线。根据地震场地条件与地面运动主周期的对立关系,本文对具有不同主频率特性的地震加速度反应谱曲线进行了分区整理,得到了基本适合各类地震场地特性的外包、中值、内切反应谱,并将三种反应谱与Housner平均加速度反应谱、ELCentro地震加速度反应谱包线及我国工民建抗震设计规范中的标准设计反应谱进行比较分析。
On the basis of Fourier-amplitude-spectra properties of deterministic earthquake accelerations and by imitating Gauss's probability density function,the paper constituted a mathematical
model of random earthquake acceleratioon Fourier-amplitude-spectra. By means of assuming different model parameters a series of random earthquake acceleration response spectra were obtained with a special computer program. According to well acknowledged data of ground motion the paper divided earthquake acceleration response spectra into three groups (of maximum value mean and minimum) corresponding to the geotechnical conditions of earthquake site as a criterion. Detailed comparison was made for the obtained acceleration response spectra with Housner's average acceleration spectrum,El Centro earthquake acceleraion (1940. 5.18,N-S) response spectrum and the Chinese standard response spectra for aseismic design (1978).
On the basis of Fourier-amplitude-spectra properties of deterministic earthquake accelerations and by imitating Gauss's probability density function,the paper constituted a mathematical
model of random earthquake acceleratioon Fourier-amplitude-spectra. By means of assuming different model parameters a series of random earthquake acceleration response spectra were obtained with a special computer program. According to well acknowledged data of ground motion the paper divided earthquake acceleration response spectra into three groups (of maximum value mean and minimum) corresponding to the geotechnical conditions of earthquake site as a criterion. Detailed comparison was made for the obtained acceleration response spectra with Housner's average acceleration spectrum,El Centro earthquake acceleraion (1940. 5.18,N-S) response spectrum and the Chinese standard response spectra for aseismic design (1978).
引文
1． 江近仁,洪峰.功率谱与反应谱的转换和人造地震波.地震工程与工程振动.Vol.4,No.3． 1984
2． Ohaski,Y., On the significance of phase content in earthquake ground motions. EESD. Vol. 7,No. 5,1979
3． 罗学海.各国混凝土坝抗震设计简介.中国科学院工程力学研究所地震工程研究报告集(第二集)
4． 何韫如,邵世勤等编著.松潘强震记录的谱分析.地震出版社.1979
5． 中国科学院工程力学所主编.海城地震震害.地震出版社.1979
6． Housner,G.W.,R.R. Martel,J.L.Alford,Spectrum Analysis of Strong-motion Earthquake. BSSA. Vol.43,No.2,1953
7． 工业与民用建筑抗震设计规范.TJ11-78,1979． 北京
8． Housner,G.W.. Behavier of Structures During Earthquake. ASCE. Vol.85,No.EM4． 1959
2． Ohaski,Y., On the significance of phase content in earthquake ground motions. EESD. Vol. 7,No. 5,1979
3． 罗学海.各国混凝土坝抗震设计简介.中国科学院工程力学研究所地震工程研究报告集(第二集)
4． 何韫如,邵世勤等编著.松潘强震记录的谱分析.地震出版社.1979
5． 中国科学院工程力学所主编.海城地震震害.地震出版社.1979
6． Housner,G.W.,R.R. Martel,J.L.Alford,Spectrum Analysis of Strong-motion Earthquake. BSSA. Vol.43,No.2,1953
7． 工业与民用建筑抗震设计规范.TJ11-78,1979． 北京
8． Housner,G.W.. Behavier of Structures During Earthquake. ASCE. Vol.85,No.EM4． 1959
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