基于实际震害的土石坝永久变形估算  

Estimation of earthquake-induced permanent deformation for earth dam based on seismic damage

作　　者：楚金旺[1] 朱晟 黄亚梅[4] CHU Jinwang;ZHU Sheng;HUANG Yamei(ENFI Research Institute,China ENFI Engineering Corporation,Beijing 100038,China;State Key Laboratory of Hydrology,Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;Institute of Hydraulic Structures,Hohai University,Nanjing 210098,China;Department of hydraulic engineering,Guangdong Polytechnic.of Water Resources and Electric Engineering,Guangzhou 510635,China)

机构地区：[1]中国恩菲工程技术有限公司恩菲研究院,北京100038 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]河海大学水工结构研究所,江苏南京210098 [4]广东水利电力职业技术学院水利工程系,广东广州510635

出　　处：《中国水利水电科学研究院学报》2017年第6期409-417,共9页Journal of China Institute of Water Resources and Hydropower Research

摘　　要：土石坝地震震害主要表现为震后永久变形,利用永久变形来评价大坝的抗震稳定与安全更为合理可行。本文结合30余座土石坝的震害资料,研究了土石坝的自振周期等基本自振特性,同时对场地地震卓越周期、滑块屈服加速度与大坝最大加速度反应等主要影响因素进行了深入分析,提出了基于土石坝实际震害的永久变形计算公式,并与Makdisi、Sarma等方法的计算值进行比较,该方法具有较好的计算精度。Earthquake-induced permanent deformation is the main performance of rockfill dams and embankments subjected to earthquake shaking,which is more reasonable than a factor of safety in evaluating seismic stability and safety of dams.In this paper,according to seismic damage of more than 30 earth dams,an in-depth study is anducted on natural vibration characteristics such as natural period are studied,factors affecting earthquake displacement such as predominant period,yield acceleration of sliding mass,maximum crest acceleration,and then calculation formulas are given to evaluate the permanent deformation.Com?pared with values of Makdisi’s,and Sarma’s method,this method is relatively precise.

关 键 词：土石坝 自振周期 卓越周期 屈服加速度 永久变形 

分 类 号：TV641[水利工程—水利水电工程]