基于抗力随时间变化的桥梁可靠度评估研究

Evaluation and study on reliability of the structure components of a bridge with consideration of time-dependent resistance

根据实际检测数据,考虑结构抗力和荷载的变化,计算实桥结构、构件的可靠度指标。考虑实际结构系统中,构件能力与荷载的相关性,确定结构系统比较合理的可靠性指标,完成当前结构承载能力的评估。在结构抗力模型和荷载模型中引入了时间参数t,提出了简单、实用的动态可靠度计算方法。确定当前结构可靠度指标,结合目标可靠指标,实现了对实桥结构剩余使用寿命的预测。

An attenuation model for time-dependent structural resistance of existing bridges is introduced. The resistance varying with time is taken into account. The reliability of load-bearing capacity for an actual bridge is assessed based on the tests are carried out for its current situation.