多点地震动时程人工合成

Artificial Generation of Multi-point Earthquake Ground Motion

分析大跨度结构需要一种效率、精度都较高的多点地震动时程合成方法。基于平稳随机过程理论推导了多点地震动时程合成公式 ,每一频率点处的时程幅值与迟滞相干矩阵特征值和特征向量有关。用数值计算研究了迟滞相干矩阵特征对的变化规律 ,提出了对其进行简化的方法 。

Based on the stationary random process theory, a simulation method for spatial correlative time histories of multi point ground motion is given. Only the modal decomposition of the lagged coherency matrix is required. With the numerical study for the eigenvalues and eigenvectors of lagged coherency matrix, a simplified method is proposed. An example illustrates the feasibility of the simplification.