广州市主要断裂带特征震源模型研究

Study on Characterized Asperity Model of Major Fault Zones in Guangzhou

在广州市目标区内的主要活动断层危险性评价的基础上,综合活断层探测的研究成果和资料,对于具有潜在发震可能的主要断层,基于凹凸体震源模型建模理论进行了特征计算模型的建模。根据断层地震危险性分析确定的断层发震震级和几何参数,进行了断层的宏观参数和微观参数的设定。为通过复核预测方法计算与合成近断层强地震动场和城市危害性评价提供了科学的依据。

This paper presents the modeling of target active faults from the project of Guangzhou Active Faults and Seismic Hazard Assessment, a sub-program of technical system of monitoring active seismic faults in China, which was the key project of the National Tenth Five- Year Plan program. Based on the results and data of urban major active faults, the modeling of characterized source models was carried out for target active faults with occurrence potential according to seismic hazard assessments in Guangzhou region. Characterized source model describing the source heterogeneity was set up using the asperity modeling theory. The outer and inner fauh parameters were specified according to the source magnitudes and geometric parameters estimated by active fault risk assessment. The study provides a scientific basis for evaluating near fault strong ground motions from future earthquakes using hybrid methods to mitigate earthquake damages in urban areas.