河北水利电力学院学报 ›› 2023, Vol. 33 ›› Issue (2): 34-39.DOI: 10.16046/j.cnki.issn2096-5680.2023.02.007

• 建筑工程专题 • 上一篇    下一篇

基于可靠性的钢筋混凝土结构服役寿命研究

陈郝   

  1. 北京六建集团有限责任公司,北京市海淀区玉泉路甲2号 100143
  • 收稿日期:2022-10-06 修回日期:2022-11-05 出版日期:2023-06-30 发布日期:2023-10-26
  • 作者简介:陈 郝(1987-),男,河北保定人,工程师,主要研究方向:钢结构。E-mail:272112045@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51178456)

Study on Service Life of Reinforced Concrete Structure Based on Reliability

CHEN Hao   

  1. BCEG NO.6 Construction Engineering CO., Ltd., 100143, Beijing, China
  • Received:2022-10-06 Revised:2022-11-05 Online:2023-06-30 Published:2023-10-26

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。

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

Abstract: 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.

Key words: reinforced concrete structure, reliability, service life, salt and freeze-thaw action, bearing capacity

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