基于可靠性的钢筋混凝土结构服役寿命研究  

Study on Service Life of Reinforced Concrete Structure Based on Reliability

作　　者：陈郝 CHEN Hao(BCEG NO.6 Construction Engineering CO.,Ltd.,100143,Beijing,China)

机构地区：[1]北京六建集团有限责任公司,北京市100143

出　　处：《河北水利电力学院学报》2023年第2期34-39,共6页Journal of Hebei University Of Water Resources And Electric Engineering

基　　金：国家自然科学基金资助项目(51178456)。

摘　　要：基于对盐与冻融作用下钢筋混凝土结构的主要特征和破坏机理分析,建立了混凝土结构相对动弹性模量变化、钢筋结构的氯离子浓度、混凝土结构的剥蚀程度综合影响下的钢筋混凝土结构服役寿命模型。再结合可靠性理论和钢筋混凝土结构承载力设计,建立了钢筋混凝土结构寿命预测模型。最后通过某城市立交桥的实例验证了服役寿命模型的可行性和可靠性,并说明我国现行规范中对于钢筋混凝土结构的耐久性考虑偏于不安全,应基于可靠性原理进行修正。Based on main characteristics and failure mechanism of reinforced concrete structure under salt and freeze-thaw action,service life models of reinforced concrete structure are established,which is in the influence of relative dynamic elastic modulus of concrete,chloride ion concentration of reinforced,and denudation degree of concrete.Then,combining the reliability theory and loading capacity design of reinforced concrete structure,the life prediction model of reinforced concrete structure is established.Finally,an engineering case of urban overpass is used to verify the correctness and reliability of service life models,which shows that the durability design of reinforced concrete structures in current specifications is not safe and should be revised in the method of reliability theory.

关 键 词：钢筋混凝土结构 可靠性 服役寿命 盐与冻融作用 承载力 

分 类 号：TU375[建筑科学—结构工程] U445.7[建筑科学—桥梁与隧道工程]