中文摘要：

建立了基于有限断层的芦山地震的混合震源模型，突出破裂面上滑动量分布中凹凸体的主导作用，同时借助五平方模型表达对震源复杂性认识尚不够深入所带来的随机性。混合震源模型中全局震源参数均值与局部震源参数均值的确定，主要依据统计的半经验标定公式，进一步借助截断正态分布将区域地震、地质构造、地震活动性提供的参数限值结合起来，生成最终的震源参数值。基于上述思路，本文共建立了30组芦山地震混合震源模型，进而以芦山地震8个近场观测台站为试算点，借助地震动反应谱残差评价的方法，从30组模型中选定了表达“平均”特征的混合震源模型。

英文摘要：

Finite fault models of the Lushan earthquake, April 20th, 2013, are made by using the hybrid slip mod- el, which emphasizes asperities in the slip distribution and considers the randomness from the complexity of the source. The global source parameters and local source parameters are treated as random variables following the trun- cated normal distribution. The mean of each parameter is determined by using semi-empirical laws, and the limit of parameter value is from the information of regional seismo-tectonics, structure of the crust, and seismicity. 30 groups of source parameters are generated, and hence the slip distributions of the 30 finite fault models are deter- mined. Using eight stations in the near field as representative points, the finite fault model which represents the av- erage characteristic of the 30 finite fault models is picked out through the evaluation of the residuals of response spectra.