基于多模式相关的混凝土重力坝服役寿命研究  

Research on Service Life of the Concrete Gravity Dams Based on Multiple Correlated Failure Modes

作　　者：胡魏玲 邓念武[1] 刘任莉[1] 

机构地区：[1]武汉大学水利水电学院,武汉430072

出　　处：《中国农村水利水电》2016年第6期150-154,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金项目NSFC(51278387);地球空间环境与大地测量教育部重点实验室开放研究基金项目(14-02-01)

摘　　要：大坝服役寿命的研究在大坝安全管理方面具有重要价值。对混凝土重力坝而言,其服役过程受到多种时变因素共同作用,潜在失效模式间也存在相关性。考虑影响因子的时变特征,基于多种失效模式相关的可靠度理论,研究了混凝土重力坝服役寿命时变特征;并提出了一种新的模型,即主次失效模式相关系数简化模型,来分析系统时变可靠度及服役寿命特征。上述模型计算系统可靠度时考虑了荷载及抗力的时变特征及失效模式间的相关性,计算简便,算例表明该模型可以应用于工程实践进行结构系统可靠度的计算。It means a lot to study the service life of the dams for the dam safety management. As for the concrete gravity dams, the service status is affected by various time-varying factors and the failure modes are correlated. In this paper, the time-varying features of the service life of the concrete gravity dams are studied, taking into account the time-varying features of the factors and the corre- lations among the failure modes. To solve the time-varying reliability for the further study of the service life, a new model using the probability theory called the simplified model with correlated primary and second failure modes, is promoted. In this model, the time -varying features and the correlation between failure modes are considered so that the model is optimized. The proposed model is ap- plied to an existing concrete gravity dam, and the results prove the practicability of the model.

关 键 词：时变可靠度 多失效模式相关 大坝服役寿命 

分 类 号：S27[农业科学—农业水土工程] TV642.3[农业科学—农业工程]