腐蚀吊索钢丝力学性能退化及分布模型研究  

Study on Distribution of Mechanical Properties Degradation and Model of Corroded Cable Wires

作　　者：乔燕[1] 李爱群[2] 缪长青[2] 孙传智[1] 

机构地区：[1]宿迁学院建筑工程系,宿迁223800 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《武汉理工大学学报（交通科学与工程版）》2015年第2期268-272,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(批准号:51078080);江苏省高校自然科学研究项目(批准号:10KJB58005)资助

摘　　要：为了进行腐蚀吊索承载力评估,需要研究腐蚀吊索钢丝力学性能退化及性能参数分布模型.利用39根袁州大桥拆除得到的腐蚀旧钢丝进行静力拉伸试验,得到钢丝的名义弹性模型、名义极限强度、名义屈服强度和延伸率等力学性能参数,分析了力学性能参数与失重率、最大蚀坑深度之间的关系散点图;采用数理统计软件分析了名义弹性模型、名义极限强度、名义屈服强度和延伸率等力学性能的概率分布模型,结果表明,在0.05的显著性水平下,腐蚀吊索钢丝的力学性能参数不拒绝正态分布和对数正态分布.In order to carry out capacity evaluation of corroded cable,the mechanical properties degradation of corroded wire and the distributed parameter model must to be studied.The 39 corroded steel wires of Yuanzhou bridge were used to study the nominal elastic model of corroded steel wire,and the nominal ultimate strength and nominal yield strength and elongation and other mechanical properties parameters were studied.The relationship between the maximum depth of corrosion pit mechanics performance parameters and weight loss rate were analyzed,and the probability distribution models of mechanical properties were analyzed using the mathematical statistics analysis software.The results show that,under 0.05 of the significance levels,the mechanical properties parameters of corroded wire does not reject the normal distribution and lognormal distribution.

关 键 词：腐蚀吊索 钢丝 力学性能 退化 分布模型 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]