基于性能的高心墙堆石坝震害风险评估研究  

Performance-based study on seismic damage risk assessment of high rockfill dam with core-wall

作　　者：相彪 靳聪聪 聂章博 XIANG Biao;JIN Congcong;NIE Zhangbo(College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, Yunnan, China;Faculty of Infrastructure Engineering,Dalian University of Technology, Dalian 116024, Liaoning, China;Yellow River Engineering Consulting Co. Ltd, Zhengzhou 450003, Henan, China)

机构地区：[1]云南农业大学水利学院,云南昆明650201 [2]大连理工大学建设工程学部,辽宁大连116024 [3]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水利水电技术》2020年第10期61-71,共11页Water Resources and Hydropower Engineering

摘　　要：高心墙堆石坝动力弹塑性分析及其震害风险评估研究可以为高心墙堆石坝抗震安全的研究提供科学依据。为此,首先在PZC弹塑性模型的基础上引入临界状态理论和状态参数的改进PZC弹塑性模型,并嵌入到SWANDYNE II程序对糯扎渡高心墙堆石坝进行动力分析。然后,根据糯扎渡高心墙堆石坝坝址场地资料设定地震动选取条件和地震波数量,选取坝顶相对震陷率作为性能参数,采用多条带法进行高心墙堆石坝地震易损性分析。最后,根据地震加速度概率密度函数与地震易损性结果,采用Monte Carlo法对糯扎渡高心墙堆石坝进行基于性能的震害风险评估研究。风险评估结果表明:糯扎渡高心墙堆石坝发生严重破坏的震害风险概率仅为9.012×10^-4,而发生轻微损伤的震害风险概率为0.1543。The dynamic elastoplastic analysis and the seismic damage risk assessment study of high rockfill dam with core-wall can provide a scientific basis for the study on the seismic safety of high rockfill dam with core-wall.Therefore,a dynamic analysis is made on the high rockfill dam with core-wall of Nuozhadu Hydropower Station by adopting the PZC elastoplastic model that is improved through introducing critical state theory and state parameters and then embedded into SWANDYNE II program on the basis of PZC elastoplastic model at first.Afterwards,the selecting condition of the seismic ground motion and the seismic wave number are set in accordance with the in situ data obtained from the site of the high rockfill dam with core-wall of Nuozhadu Hydropower Station,and then the seismic subsidence rate at the crest of the dam is taken as the performance parameter to analyze the seismic vulnerability of the high rockfill dam with core-wall through multi-strip approach.Finally,the performance-based seismic damage risk assessment study is carried out by means of Monte Carlo approach according to the probability density function of the seismic acceleration and the seismic vulnerability.The risk assessment result shows that the probability of the occurrence of the seismic damage risk with serious damage is only 9.012×10^-4,while the probability of the occurrence of the seismic damage risk with slight damage is 0.1543 for the high rockfill dam with core-wall of Nuozhadu Hydropower Station.

关 键 词：改进PZC弹塑性模型 多条带法 地震易损性 震害风险评估 

分 类 号：TV641[水利工程—水利水电工程]