氯离子侵蚀环境下混凝土结构耐久性寿命评估方法研究

根据氯离子侵蚀环境下混凝土结构中钢筋锈蚀的发生和发展,分析了结构性能的衰退过程,得到了氯离子侵蚀环境下结构耐久性寿命评估模型.考虑到寿命评估模型中主要参数的不确定性影响,基于Monte Carlo原理,采用CrvstalBall软件对混凝土构件进行了随机模拟.随机模拟结果显示,保护层厚度及氯离子浓度是影响氯离子侵蚀环境下混凝土结构耐久性寿命的重要参数.

Research on Methods of Concrete Structure Durability Service Life Assessment Under Chloride Corrosion Environment

The degenerative processes of structure performances are analyzed according to the occurrence and development of steel bars corrosion of concrete structures under the chloride corrosion environment,and the models of structure durability service life assessment are summarized.Considering the uncertain factors of durability service life prediction,the concrete structural members are stochastically simulated using CrystalBall software based on Monte Carlo principal.The simulation results show that the concrete cover thickness and chloride concentration are the major factors of durability service life assessment of concrete structures under the chloride corrosion environment.