摘要
已经投入使用的大坝,由于荷载、环境(包括自然环境和使用环境)及材料内部作用的影响,在使用了较长一段时间或遭受某次灾害作用(如地震或洪水)后,往往会发生不同程度的损伤破坏,其抗力和荷载效应都与初始理论设计状态有所不同。为此,研究已建重力坝抗力与荷载效应随时间变化的规律,找出大坝整体失效概率计算方法,为大坝整治维护提供依据。
During the process of operation, since loads, circumstance（including natural and operation conditions）and interior materials changed with time, after a long term usage or suffering a certain disasters there are some damages at different level. Obviously, strutural resistance and loads have quite different with original designed situations. In this paper, the calculation method considering structural resistance and loads with time varying in gravity dam is established which can provide theoretical basis for dam maintenance in future.
出处
《水力发电》
北大核心
2009年第8期77-79,共3页
Water Power
基金
国家自然科学基金资助项目(50679036)
湖北省自然科学基金资助项目(2008CDZ069)
关键词
重力坝
可靠度
时变模型
损伤
失效概率
gravity dam
reliability
time-varying model
damage
failure probability
