考虑钢筋锈蚀的渡槽时变可靠度分析  

Time-varying reliability analysis of aqueduct considering reinforcement corrosion

作　　者：常佳 祝彦知[1,2] CHANG Jia;ZHU Yanzhi(School of Civil Engineering and Architecture,Zhongyuan University of Technology,Zhengzhou 450007,China;Architectural Design and Research Institute,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院建筑工程学院,河南郑州450007 [2]中原工学院建筑设计研究院,河南郑州450007

出　　处：《中原工学院学报》2019年第5期53-56,共4页Journal of Zhongyuan University of Technology

摘　　要：根据钢筋锈蚀理论,以时间为变量,考虑钢筋锈蚀导致渡槽可靠度下降的随机性,建立了钢筋锈蚀的时变可靠度计算模型。基于中心点法与Monte-Carlo法,采用Matlab软件,编写相应的计算程序,对渡槽耐久性进行了分析。计算结果表明,基于渡槽钢筋锈蚀可靠度的时变性,能很好地反映结构劣化的动态变化与维护时间。模拟结果表明,所建立的计算模型能较好地反映钢筋混凝土渡槽结构的耐久性变化。The durability study of aqueduct structure is of great significance to its safe operation.There are relatively few studies on reinforcement corrosion damage in aqueduct structure.Based on the theory of reinforcement corrosion amount and time variable,a time-varying reliability calculation model of reinforcement corrosion is established considering the randomness of the reliability decline of aqueduct caused by reinforcement corrosion.Based on the central point method and Monte-Carlo method,the corresponding calculation program is compiled with Matlab,and the durability of aqueduct is analyzed.The results show that considering the time-varying reliability of reinforcement corrosion in aqueduct,the dynamic change and maintenance time of structural deterioration can be well reflected.The durability of aqueduct can be simulated by using the above two methods,from which it can be seen that the calculation model established in this paper can better reflect the durability of reinforced concrete aqueduct structure.

关 键 词：钢筋混凝土渡槽 钢筋锈蚀 时变可靠度 MONTE-CARLO法 中心点法 

分 类 号：TV331[水利工程—水工结构工程]