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本文在分析了徐州地区地震地质背景的基础上,用经作者扩展的SAP 5程序,重点分析了地震小区划中提出的埋藏基岩斜坡地形对地震地面运动的影响问题。初步认识到:这种复杂地形可产生不可忽视的竖向运动;水平向运动分布依其与基岩山丘的距离而不同;地震反应谱形状呈有规律的变化;输入多方向震波的影响比输入单方向震波时的影响要大。
Based on the analysis of the seismo-geological background in Xuzhou area, this paper analyzes the impact of burial bedrock slope topography on the ground motion caused by earthquakes using the extended SAP 5 program. It is preliminarily realized that this complex terrain can produce vertical movement which can not be neglected. The distribution of horizontal motion varies with the distance from bedrock hills. The shape of seismic response spectrum changes regularly. The impact of unidirectional shock waves is greater.