滁州地区覆盖层厚度对场地地震动参数的影响  

Effect of Thickness of Covering Layer on the Seismic Ground Motion Parameters of Site in Chuzhou Region

作　　者：梁久亮[1] 曹均锋[1] 王立会[1] 冯伟栋[1] 

机构地区：[1]安徽省地震局,安徽合肥230031

出　　处：《防灾科技学院学报》2015年第1期40-46,共7页Journal of Institute of Disaster Prevention

基　　金：安徽省地震科研青年基金项目(20120707;20140301)

摘　　要：以滁州地区近百个钻孔资料为原型建立土层模型,采用一维频域等效线性化波动方法进行了土层地震反应分析,重点分析了覆盖层厚度对场地地震动参数的影响。研究结果表明,随着覆盖层厚度的增加,地表峰值加速度及土层放大系数逐渐增大,当覆盖层厚度超过一定值时,地表峰值加速度及土层放大系数呈逐渐缓慢减小的趋势;而反应谱特征周期总体上随着覆盖层厚度的增加而逐渐增大。Based on the data of nearly one hundred boreholes in Chuzhou Region, soil layer models are generated. Soil seismic response is analyzed by using one dimensional frequency domain equivalent linearization wave method, it is analyzed emphatically that thickness of covering layer influences the ground motion parameters. The research results show that surface peak acceleration and soil amplification coefficient are increased gradually with the increase of thickness of covering layer, when the thickness of covering layer is more than critical value, surface peak acceleration and soil amplification coefficient present a trend of gradual slow decrease. However, the characteristic period of response spectra are increased generally along with the increase of thickness of covering layer.

关 键 词：覆盖层厚度 峰值加速度 特征周期 

分 类 号：P315.4[天文地球—地震学]