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发表时间：2016-01-01

发表刊物：大连理工大学学报

所属单位：建设工程学部

期号：4

页面范围：362-366

ISSN号：1000-8608

摘要：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.

备注：新增回溯数据