摘要
本文从拱坝震害,分析了拱坝抗震的特点、薄弱部位和坝肩动力失稳的过程,指出了拱坝坝肩抗震稳定分析与边坡稳定分析的不同之处,探讨了失稳安全系数的定义和意义,最后,回顾了基于现行抗震规范要求的刚体极限平衡方法并指出了其局限性,以及“九五”攻关期间所采取的改进措施,提出了更切近实际,能反应拱坝抗震稳定诸特点,从概念和方法上都有别于传统的刚体极根平衡法的新的拱坝坝肩抗震稳定分析方法,以及与之相配套的以坝体为主体的坝肩岩体稳定的工程安全准则。
Based on damage caused by earthquake on arch dam,the arch dam aseismatic trait,weak position and the process of dynamic destabilization are analyzed.It is indicated that dynamic stability analysis of arch dam abutment is different from slope stability analysis,and the definition and meaning of stability safety factor are discussed.Finally,the limit equilibrium method of rigid body and its localization are simply discussed.A new method is proposed for stability analysis of arch dam abutment,which is very close to practice and can reflect the aseismatic stability feature and is different from the traditional limit equilibrium method of rigid body.Also,the corresponding ultimate limit safety criterion of arch dam abutment is elementarily studied.
出处
《水力发电学报》
EI
CSCD
北大核心
2004年第6期40-44,共5页
Journal of Hydroelectric Engineering
关键词
水工结构
坝肩抗震稳定
刚体极限平衡
拱坝
失稳安全系数
hydraulic structure
abutment aseismatic stability
limit equilibrium of rigid body
arch dam
stability safety factor
