地震危险性分析和地震动输入机制研究

结合溪洛渡,小湾等水电工程,研究300m级高拱坝抗震设计中的基础性问题：场址地震危险性分析中不确定性因素的影响分析,重大工程设定地震的确定,设计地震运输入机制等,建立了中国水利水电强震记录数据库,首次将地理信息系统（GIS）高新技术用于水库诱发地震危险性预测分析。本专题成果成大型高拱坝工程的抗震设计提供了一套更合理,具有实用价值的科学方法。

Analysis on earthquake risks and study on the earthquake dynamic input mechanism

In accordance with the key technical problems faced by the earthquake resistance of high arch and in combination with the Xiaowan and Xiluodu projects, the study on the earthquake resistance of high arch dam has been made. The study includes the analysis methods of the earthquake response of arch dam system as continuous media and the earthquake resistant stability of dam abutment and the application to the Xiaowan arch dam; the dynamic model test on the arch dam as an integrity or with joints; the analysis methods of the earthquake response of arch dam system as discrete media and the earthquake resistant stability of dam abutment; the impact of thick sedimentation on dynamic pressure of dam surface; response analysis on the arch dam under the conditions of stochastic earthquake dynamic field.