【摘要】 选取属于特定震源机制、场地平均剪切波速、震级和断层距下的36条近场脉冲型地震记录作为输入,按照速度脉冲周期对地震记录进行分组,运用Matlab进行脉冲型地震动作用下的位移反应谱计算,采用标准化和平均化的方式研究位移反应谱的特征,用分段线性拟合方法建立以速度脉冲周期作为特征周期的设计位移反应谱,给出位移反应谱的峰值和分段周期。研究结果表明:脉冲型地震动下位移反应谱的谱形呈现出4个阶段,谱特征周期近似等于速度脉冲周期,经标准化和平均化后的谱峰值约等于2.2,文中给出的设计位移反应谱能较好地拟合平均位移反应谱。更多还原

【Abstract】 The 36 near-fault pulse-type earthquake records that had specific fault mechanism, average shear wave velocity, magnitude and closest distance to rupture plane were used as input. The earthquake records were divided into different groups according to pulse period and the displacement response spectra under pulse-type ground motions was solved by using Matlab. The features of the displacement response spectra were studied by means of normalizing and averaging, displacement design spectra using pulse period as characteristic period was established by using piecewise linear fitting method, and the peak value and piecewise periods were provided. The results show that the displacement response spectra consist of four stages, the characteristic period is approximately equal to pulse period, the peak value of the displacement spectra getting through normalizing and averaging is about 2.2, and the displacement design spectra can fit the displacement average spectra appropriately.更多还原