中文摘要：

港工混凝土结构处在海洋环境中，氯离子侵蚀引起的结构耐久性退化问题颇为严重。作者以大量华南地区高桩码头耐久性检测数据为基础，探究符合我国海洋环境的港工混凝土结构的环境荷载模型。该文基于菲克第二定律，对模型中的环境荷载Cs进行讨论，确定了Cs的概率分布及其均值、标准差。最后通过蒙特卡洛数值模拟与国际已有成果进行对比，探讨了环境荷载模型对结构耐久性分析的影响。

英文摘要：

Durability deterioration caused by chloride penetration is one of the most serious problems ot marine concrete structures in chloride environment. This paper explores the application of empirical durability deterioration model to marine concrete structures, utilizing the in-situ test data from durability inspection and assessment reports in South China. This paper discusses the environmental load （Cs） model of concrete structures subjected to chloride penetration, and determines the probability distribution, mean and standard deviation of Cs by regression analysis based on the Fick＇s Second Law. Finally, this paper adopts a Monte Carlo Simulation program to compare the obtained environmental load model with existing ones, and discusses the influence of environmental load model on durability analysis.