鞭梢效应对大坝抗震减震的影响研究

英文篇名：Whiplash effect on earthquake resistance and shock absorption of dams
中文刊名：水力发电学报
英文刊名：Journal of Hydroelectric Engineering
作者：张汉云 ; 张燎军 ; 宫必宁
英文作者：ZHANG Hanyun ; ZHANG Liaojun ; GONG Bining(College of Water Conservancy and Hydropower Engineering ; Hohai University ; Nanjing 210098)
中文关键词：水工结构 ; 抗震减震 ; 鞭梢效应 ; 大坝 ; 有限元
英文关键词：hydraulic structure ; earthquake resistance and shock absorption ; whiplash effect ; dams ; FEM
出版日期：2009-10-25
机构：河海大学水利水电工程学院;
年：2009
期：05
出版单位：水力发电学报

摘要

本文推导鞭梢效应的理论公式,分析其产生原因及条件,讨论建筑物上突出结构对主体结构的减震作用。以重力坝为例详细研究鞭梢效应对结构变形和应力的影响,以及要达到最佳的减震效果,突出鞭梢结构的固有频率、阻尼比与主体结构固有频率、阻尼比的关系。研究成果可以为大坝抗震设计和研究提供有益参考。
The cause and occurrence condition of the whiplash effect are analyzed in this paper.The application of attachment structure to alleviate seismic effect of the main structure is discussed.A gravity dam is taken as a test case to study the effect of whiplash on stress and strain of the main structure.In addition,the relationship between natural frequency and damping ratio of attachment structure and that of main structure are studied to achieve the optimal shock absorption. The results could provide valuable reference in anti-seismic design and research of dam.

引文

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