局部场地上地震动的强度包络函数的特性研究
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摘要
本文应用SMART—1台阵的三次地震记录研究了局部场地上地震动强度包络函数的变化规律,建立了各参数的回归模型,并用方差分析法和T值法对回归方程和各个自变量进行了检验。分析结果表明,平稳段起始时间t_1主要受测点坐标的影响,强度因子I_0、平稳段长度t_3和衰减系数c除了受测点坐标的影响外,还不同程度地受测点所在位置的土层厚度的影响。文中还给出了各个参数的初步预测公式。分析结果可供多点地震动模拟时参考。
In the paper,the regression models of all main parameters of envelope function of ground motion are established,and the regression equation and its arguments are checked by using methods of variance analysis and T value. The variable characteristics of parameters in local site are studied,based on data of 3 events of SMART-1. The results analyzed show that the start time of stationary duration, t1,is mainly controlled by coordinates of stations,and the intensity factor,I0,the stationary duration,ts and attenuation coefficients,are influenced not only by coordinates of stations,but also by thickness of soil layer. In this paper,the preliminary prediction formulas of I0,t1,ts and c are also provided. These results may be used to simulate the multi -point ground motion as reference.
In the paper,the regression models of all main parameters of envelope function of ground motion are established,and the regression equation and its arguments are checked by using methods of variance analysis and T value. The variable characteristics of parameters in local site are studied,based on data of 3 events of SMART-1. The results analyzed show that the start time of stationary duration, t1,is mainly controlled by coordinates of stations,and the intensity factor,I0,the stationary duration,ts and attenuation coefficients,are influenced not only by coordinates of stations,but also by thickness of soil layer. In this paper,the preliminary prediction formulas of I0,t1,ts and c are also provided. These results may be used to simulate the multi -point ground motion as reference.
引文
[1] 王前信、伍国騆、李云林,拱式结构对地震多支点输入的反应,地震工程与工程振动,4卷2期,1984．
[2] 胡聿贤、周锡元,地震力统计理论的评介,中国科学院土木建筑研究所地震工程研究报告集,第一集,科学出版社,1962．
[3] 胡聿贤、周锡元,弹性体系在平稳和平稳化地面运动下的反应.中国科学院土木建筑研究所地震工程研究报告集,第一集,科学出版社,1962．
[4] M. Amin and A. H-S. Ang,Nonstationary Stochastic Model of Earthquake Motions,ASCE,Vol. 94,EM2,1968．
[5] R.N. Iyengar and T. S. R. Iyengar, A Nonstationary Random Process Model for Earthquake Accelerograms, Bull. Seisin. Soc. Am.,Vol. 59,No. 3,1969．
[6] M. Shinozuka and Y. Sato,Simulation of Nonstationary Random Process,ASCE,Vol. 93,EM1,1967．
[7] 胡聿贤著,地震工程学,地震出版社,1988．
[8] 霍俊荣、胡聿贤、冯启民,地面运动时程强度包络函数的研究,地震工程与工程振动,11卷1期,1991．
[9] 谢礼立、张晓志,地震动记录持时与工程持时,地震工程与工程振动,8卷1期,1988．
[10] 谢礼立、周雍年,一个新的地震动持续时间定义,地震工程与工程振动,4卷2期,1984．
[11] H. Takizawa and P. C. Jennings,Collapse of a Model for Ductile Reinforced Concrete Frames under Extreme Earthquake Motions,Earthquake Engineering and Structural Dynamics,Vol. 8,117-144,1980．
[12] N.A. Abrahamson,Estimation of Seismic Wave Coherency and Rupture Velocity Using the SMART-1 Strong-Motion Array Recordings,EERC Report, No. UCB/EERC-85/02,1985．
[13] 安希忠、林秀梅编著,实用多元统计方法,吉林科学技术出版社,1992．
[14] 方开泰、全辉、陈庆云,实用回归分析,科学出版社,1988．
[2] 胡聿贤、周锡元,地震力统计理论的评介,中国科学院土木建筑研究所地震工程研究报告集,第一集,科学出版社,1962．
[3] 胡聿贤、周锡元,弹性体系在平稳和平稳化地面运动下的反应.中国科学院土木建筑研究所地震工程研究报告集,第一集,科学出版社,1962．
[4] M. Amin and A. H-S. Ang,Nonstationary Stochastic Model of Earthquake Motions,ASCE,Vol. 94,EM2,1968．
[5] R.N. Iyengar and T. S. R. Iyengar, A Nonstationary Random Process Model for Earthquake Accelerograms, Bull. Seisin. Soc. Am.,Vol. 59,No. 3,1969．
[6] M. Shinozuka and Y. Sato,Simulation of Nonstationary Random Process,ASCE,Vol. 93,EM1,1967．
[7] 胡聿贤著,地震工程学,地震出版社,1988．
[8] 霍俊荣、胡聿贤、冯启民,地面运动时程强度包络函数的研究,地震工程与工程振动,11卷1期,1991．
[9] 谢礼立、张晓志,地震动记录持时与工程持时,地震工程与工程振动,8卷1期,1988．
[10] 谢礼立、周雍年,一个新的地震动持续时间定义,地震工程与工程振动,4卷2期,1984．
[11] H. Takizawa and P. C. Jennings,Collapse of a Model for Ductile Reinforced Concrete Frames under Extreme Earthquake Motions,Earthquake Engineering and Structural Dynamics,Vol. 8,117-144,1980．
[12] N.A. Abrahamson,Estimation of Seismic Wave Coherency and Rupture Velocity Using the SMART-1 Strong-Motion Array Recordings,EERC Report, No. UCB/EERC-85/02,1985．
[13] 安希忠、林秀梅编著,实用多元统计方法,吉林科学技术出版社,1992．
[14] 方开泰、全辉、陈庆云,实用回归分析,科学出版社,1988．
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