摘要
介绍了氯盐侵蚀下影响预应力混凝土中氯离子扩散的各种因素,并参照试验结果,得出保护层厚度、氯离子扩散速度以及表面氯离子浓度是影响预应力混凝土结构耐久性的三个重要参数。运用可靠度理论,建立了氯盐侵蚀下预应力混凝土结构的耐久性分析模型,并提出了基于一定可靠度水准的耐久寿命预估方法。分析结果表明,保护层厚度对氯盐侵蚀下的预应力混凝土结构耐久性影响最大,另外两种因素次之。
Some factors which influence the diffusion of chloride ion in prestressed concrete suffering from chloride ions invasion are introduced.Based on the test results,three important parameters are the thickness of protection,chloride ions diffusion velocity and chloride ions concentration at surface.Then,based on reliability theory,an analytical model of durability of prestressed concrete structures suffering from chloride ions invasion is given,and an evaluation way of durability life is put forward.All analytical results show that the thickness of protection has the biggest influence on durability of prestressed concrete structure,and the other two parameters are the second.
出处
《建筑结构》
CSCD
北大核心
2005年第4期28-30,37,共4页
Building Structure
基金
国家自然科学基金资助项目 (5 99780 0 8)
