【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t₁主要受测点坐标的影响,强度因子I₀、平稳段长度t₃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。更多还原

【Abstract】 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.更多还原