【摘要】 在对89、01抗震规范中Ⅰ类场地分类界限深入的探讨的基础上,利用目前地震安全性评价中广泛使用的基于一维等效线性化波动方法研究了某市沿海地区为代表的浅层覆盖土条件下的地震动参数取值问题。针对各种情况下Ⅰ类建筑场地土,构造若干具有工程意义的典型场地剖面,合成适合本地区的基底输入地震波,计算得到浅层覆盖土条件下的场地地表加速度峰值和反应谱周期。通过对几种类型土计算结果和实际操作的分析和探讨,结果表明:放大倍数谱描述结果概念更强;复核结果偏于保守,且与抗震选用参数不兼容;当钻孔足够多时,低波速钻孔标定谱形接近高波速钻孔。更多还原

【Abstract】 In this paper,after discussingⅠ-site classification of 89 Code and 01 Code(Code for Seismic Design of Buildings GB50011-2001),the questions of response spectra values of specific soil in Yantai city are studied with software ESE and by using 1-D equivalent linearization wave method.Some representative site profiles with engineering values are selected and constructed to calculate the response spectra of different sites under suitable ground motions.Effect of soil layer construction on characteristic periods and acceleration peaks of response spectra are studied,and some valuable results are obtained:β-spectra are reasonable for describing the results;checking results are on high safe side,and are not suitable with design parameters;the β-spectra figures of low shear wave velocity in bores are similar to the high shear wave velocity in ones while samples are enough.更多还原