【摘要】 为了给沿海地区在役混凝土桥梁的耐久性研究提供更加可靠的理论依据,针对影响沿海地区混凝土桥梁耐久性的主要因素——氯离子侵蚀引起钢筋的锈蚀,从氯离子扩散的角度出发,综合各国氯离子扩散的相关数学模型,提出考虑荷载影响因子和氯离子结合能力这2种因素的混凝土氯离子扩散修正模型,并借助于各国相关的试验数据对氯离子扩散修正模型进行了验证和分析。研究结果表明:与传统的仅考虑单一影响因素的氯离子扩散模型相比,所提出的氯离子扩散修正模型更加合理,可以更准确地预测沿海地区在役混凝土桥梁的剩余使用寿命。更多还原

【Abstract】 In order to provide reliable theoretical foundation for durability of in-service reinforced concrete bridges in coastal environment,aimed at the main factor-the invasion of chlorideion,which causes the reinforced steel corrosion that affects the durability of concrete bridges,from the perspective of the chloride diffusion,reviewing the works on chloride diffusion mathematical model,a revised model was put forward to predict the trend of chloride diffusion by considering the load factor and chlorineion combining ability.With relevant experimental data at home and abroad,the validity of the presented model was verified.The results show that the revised model is more reasonable,compared with the traditional chloride diffusion model only considering the mono factor,thus can precisely predict the left service life of in-service concrete bridges in coastal environment.更多还原