【摘要】 场地条件对地震动幅值和频谱特性均有影响,现行的中国地震动参数区划图根据场地类别调整地震动反应谱特征周期,但尚未考虑到对地震动峰值和反应谱平台值的调整.以成都盆地为例,广泛收集了盆地范围内的工程钻孔资料.考虑到不同工程地质分区内场地地震动参数可能存在较大差异,在研究区工程地质分区的基础上,利用等效线性化方法对钻孔进行了土层地震反应分析,给出了成都盆地内不同工程地质分区的地震动参数调整系数建议值.更多还原

【Abstract】 Site condition can affect amplitude and spectrum characteristics of seismic ground motion.Adjustment scheme for ground motion characteristic period of response spectrum in Current Seismic Ground Motion Parameter Zonation Map of China was given but peak ground motion and platform value of response spectrum were not taken into account.Illustrated by the example of Chengdu basin,engineering borehole data in the basin region were extensively collected.In consideration of the large difference between different engineering geological divisions,the equal linear method was used to conduct seismic response analysis of soil layers for different boreholes based on engineering geological division.As a result,suggested earthquake ground motion adjustment factors for different engineering geological divisions were given.更多还原