摘要
按基于某一限值可靠度的方法对既有桥梁结构剩余使用寿命进行了研究,在介绍了相关文献的半经验半理论的预测方法和基于动态可靠度预测方法的基础上,对拟采用维修或加固措施以延长剩余寿命的桥梁,提出了基于体系可靠度并考虑最优维修方案组合的寿命预测方法,并建立了优化数学模型。研究表明:该方法以桥梁的完整使用周期为研究对象,从而确定与安全、经济的维修决策相对应的最优使用寿命,但仍有许多问题需做进一步研究。
The current residual service life prediction methods were studied based on reliability theory by comparing reliability index with the limit-index. Semiempirical and semirational method and dynamic reliability method were presented. A new residual service life prediction method, based on the system reliability theory and optimal maintenance combination, was put forward for bridge structure requiring maintenance or reinforcement to extend its residual service life. And an optimum mathematics model was established. The research showed that the method, based on bridge＇s life cycle consideration, can predict the optimum service life corresponding to safety and economical maintenance or reinforcement decision-making, and that there are issues need to be further studied.
出处
《公路交通科技》
CAS
CSCD
北大核心
2006年第9期51-53,62,共4页
Journal of Highway and Transportation Research and Development
关键词
既有桥梁
可靠度
剩余寿命预测
优化
existing bridge structure
reliability
residual service life prediction
optimum
