钢筋锈蚀是造成混凝土结构耐久性失效的最主要原因,海洋环境下导致混凝土结构中钢筋锈蚀的主要因素是C l-侵蚀。本文考虑氯离子的渗透随机过程,建立了海洋环境下结构抗力的随机模型;以桥梁服役状态下,钢筋锈蚀导致结构性能劣化为出发点,运用可靠度分析方法,对海洋环境下钢筋混凝土结构不同时期计入耐久性的承载力进行了分析,并用于某跨海大桥墩柱的耐久性评估。 Corrosion of steel bars is the most important cause of durability failure of concrete structures. The main factor that leads to corrosion of steel bars in concrete structures under marine environment is Cl-erosion. In this paper, we consider the stochastic process of chloride ion infiltration and establish a stochastic model of structural resistance in marine environment. With the bridge under service, the corrosion performance of steel bars is deteriorated as the starting point. By using reliability analysis method, Bearing capacity included in durability was analyzed and used to evaluate the durability of a pier for a sea-crossing bridge.