摘要
土石坝坝顶沉降量预测是土石坝抗震设计的重要内容之一。基于123个震害调查资料的整理分析,并结合48个土石坝地震永久变形计算分析结果,给出了地震作用下土石坝坝顶沉降估算的经验方法。分析结果表明,虽然基于应变势的整体变形分析结果较坝顶实测地震沉降量稍高,但基本能够反映土石坝地震沉降量规律。采用现代碾压施工技术修建的土石坝可以抵抗中等乃至较强地震的作用,坝顶地震沉降量不会超过坝高的1%。
Settlement of dam crest induced by earthquake is a control factor in aseismic design of earth and rock-fill dam.This paper presents two empirical fitting relationships that were obtained through an analysis on the performance of such dams due to earthquake reported in the publication for 123 case histories and also an analysis on numerical calculations of permanent deformation of 48 dams using an equivalent nodal force concept.The results show that the numerical method is an effective technique of simulating earthquake-induced permanent deformation,while its predictions are higher than those of the reported case histories.This paper concludes that the well-built dams based on the modern design rules can withstand moderate to strong earthquake shaking and that the crest settlement is less than one percent of the dam height.
出处
《水力发电学报》
EI
CSCD
北大核心
2012年第2期183-191,共9页
Journal of Hydroelectric Engineering
基金
国家自然科学基金项目(90815024
51121005)
中国工程院咨询项目
关键词
水工结构
地震沉降
调查
土石坝
hydraulic structure
earthquake-induced settlement
investigation
earth and rock-fill dam
