大连理工大学学报2016，Vol.56Issue(4)：362-366,5.DOI:10.7511/dllgxb201604006
考虑非线性累积损伤的桥梁疲劳寿命分析
Bridge fatigue life analysis considering nonlinear accumulative damage
摘要
Abstract
To accurately reflect the nonlinear accumulative damage of bridge,a bridge nonlinear accumulative damage model was proposed and the effect of the main parameter in the model on bridge fatigue life was analyzed.Firstly,the bridge nonlinear accumulative damage model based on damage mechanics was propounded and a formula for calculating equivalent stress amplitude was given.Then, the effect of the main parameter in the model on fatigue life was analyzed.Finally,the fatigue life of a bridge in Dalian was analyzed based on the bridge nonlinear accumulative damage model and Miner model.The research results indicate that the damage is increased with the reduced material parameterαand equivalent stress amplitude is the main factor to structure damage.The bridge nonlinear accumulative damage model can reflect actual nonlinear accumulative damage process while Miner model is pessimistic.关键词
非线性累积损伤/疲劳寿命/Miner模型/参数分析Key words
nonlinear accumulative damage/fatigue life/Miner model/parameter analysis分类
建筑与水利引用本文复制引用
王会利,秦泗凤,谭岩斌..考虑非线性累积损伤的桥梁疲劳寿命分析[J].大连理工大学学报,2016,56(4):362-366,5.基金项目
国家留学基金资助项目(201506060044,201508210247) （201506060044,201508210247）
辽宁省教育厅科学研究一般项目(L2014027) （L2014027）
中央高校基本科研业务费专项资金资助项目(DUT15QY34) （DUT15QY34）
亚热带建筑科学国家重点实验室开放基金资助项目(2014KB11) （2014KB11）
