A three-dimensional oblique incidence method based on stress time-history functions of seismic body waves
A three-dimensional oblique incidence method based on stress time-history functions of seismic body waves
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DOI：
10.1007/s12665-018-7691-0
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发表时间：
2018-07
影响因子：
2.8
通讯作者：
Xuhui Zheng;Jinzhong Sun;L. Yao;Lei Liu;Anyang Shao
中科院分区：
文献类型：
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作者：
Xuhui Zheng;Jinzhong Sun;L. Yao;Lei Liu;Anyang Shao
提出了一种基于地震体波应力时程函数的三维斜入射方法。该方法实现了单个体波相位或多相位叠加的三维斜入射，在边坡地震响应分析中考虑了地震作用。为了实现该方法，首先描述边坡与入射地震波射线之间的空间关系，并用两个参数定义入射地震波的方向：方位角，反映震中的方位角；和方位角，反映震中的方位角。入射角是震源深度和震中距的集中体现。其次，在边坡数值模型的底部边界处，计算斜入射地震波激发下各节点的振动起始时间。通过考虑振动时间序列，实现对坡底岩土介质的连续扰动。然后推导了六个体波相位的应力时程函数。 x的数值模拟结果证明了该方法的有效性、适用性和必要性。
This paper presents a three-dimensional oblique incidence method based on stress time-history functions of seismic body waves. This method realizes the three-dimensional oblique incidence of a single body wave phase or superposed multiple phases, which considers the earthquake action in the analysis of the slope seismic response. To implement this method, first, the spatial relationship between slope and incident seismic wave rays is described, and the direction of incident seismic waves is defined with two parameters: the azimuth angle, which reflects the azimuth of epicenter; and the incident angle, which is a concentrated expression of the hypocentral depth and epicentral distance. Second, at the bottom boundary of the slope numerical model, the vibration starting time of each node excited by an oblique incident seismic wave is calculated. By considering vibration time sequence, the successive disturbance of rock and soil medium at the bottom of the slope is achieved. Then the stress time-history functions of six body wave phases are derived. Numerical simulation results of the x demonstrate the effectiveness, applicability and necessity of the proposed method.