中文摘要：

近年来,沿海地区的建筑用砂逐步转向淡化海砂,而最受瞩目的是氯离子对混凝土耐久性能的影响。为了考虑影响氯离子侵蚀因素的随机性,分析了其概率分布特征,基于Monte Carlo方法,将可靠指标作为氯离子侵蚀耐久寿命终结的标志,进而对淡化海砂混凝土的氯离子侵蚀耐久寿命进行预测,完善了氯离子侵蚀环境下淡化海砂混凝土结构耐久寿命的预测方法。

英文摘要：

With the rapid development of domestic infrastructure constructions,the contradiction between supply and demand of sand resources has been increasingly pronounced,especially in some coastal regions.Some experiences indicated that the utilization of sea sand is an effective method to ease the lack of sand.Much attention on the research of sea sand concrete has been placed on qualitative debate and seldom focus on the quantitative study,even less on the life prediction and probability analysis on the sea sand concrete structures under the chloride environment.Using the Monte Carlo method,research work was carried out to study the probability distribution of factors influencing the durability life of sea sand and washed sea sand concrete structures.The relationship between durable reliability index and corrosion initiation time was established.This paper took the time when durable reliability index fell below the regulated index as the end of durable life.The proposed predictive method of durability life for concrete structures under the chloride erosion environment was therefore improved.