现役华南地区输电塔架钢结构材料剩余强度研究  

RESIDUAL STRENGTH OF STEEL TOWER ON SERVICE IN SOUTHERN CHINA

作　　者：张川[1] 姚卫星[1] 夏开全[2] 

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016 [2]中国电力科学研究院,北京100055

出　　处：《机械强度》2013年第3期354-358,共5页Journal of Mechanical Strength

基　　金：国家重点基础研究发展计划(973)项目(2007CB714600);教育部长江学者创新团队项目(Irt0906)资助~~

摘　　要：通过对使用环境中服役30年的钢结构材料进行静强度试验,得到腐蚀疲劳环境下钢材的剩余强度。通过分析试验结果,确定腐蚀疲劳环境对金属材料剩余强度的影响,并给出概率分布模型。研究结果表明:腐蚀疲劳会造成部分结构产生内部损伤,大大降低该类试件的剩余强度,未产生内部损伤的结构材料其剩余强度小幅下降,全部试件剩余强度呈现双峰特性,可以用混合对数正态分布描述其概率分布。The specimens which were made from steel structure that used more than 30 years were tested to obtain residual strength. By analyzing the results of experiments, the influence of corrosive fatigue on residual strength of metallic material and the probability distribution of residual strength were determined. The results showed that corrosive fatigue could cause the internal damage of some specimens, which would definitely reduce the residual strength of specimens. The residual strength of specimens which did not have internal damage declined slightly. The probability distribution of residual strength of all specimens was bimodal and would be described by mixed lognormal distribution.

关 键 词：腐蚀疲劳 剩余强度 断口形貌 概率分布 

分 类 号：TG115.57[金属学及工艺—物理冶金] TG115.9[金属学及工艺—金属学]