论文部分内容阅读
以国家地震重点防御地区的调查结果为基础,基于近场强地震动预测方法体系进行了昆明普渡河-西山断裂设定地震(M6.5)的强地震场预测研究.预测方法采用三维有限差分元法和改良的统计学格林函数法组合的复合方法.针对昆明盆地三维地下结构模型和基于昆明活断层探测和危险性评价结果的特征凹凸体震源模型进行了计算.结果表明盆地构造对于盆地边缘附近地区的强地震动波形的振幅具有显著的影响作用,复合预测方法可以模拟盆地产生的面波在内的宽频带强地震动场,为基于考虑区域环境条件的近断层强地震动场基础上的城市和重要工程的地震评价提供了可能.
Based on the survey results of the national key earthquake defense areas, a strong earthquake field prediction study of the Kunlun Puduhe-Xishan fault set earthquake (M6.5) was carried out based on the near-field strong earthquakes prediction method system.The prediction method uses three-dimensional finite difference Element method and a modified statistical Green’s function method, the three-dimensional subsurface structural model of Kunming basin and the focal model of asperity body based on the results of Kunming active fault detection and risk assessment are calculated.The results show that the basin structure is not suitable for the basin margin The amplitude of strong ground motion waveforms in the nearby area has a significant effect, and the composite prediction method can simulate the broad-band strong ground motion field generated by surface waves in the basin. Based on the near-fault strong ground motion field considering the regional environmental conditions Seismic evaluation of major cities and cities is possible.