气候变化对RC结构碳化侵蚀可靠度的影响

发布时间：2018-03-22 17:50

  本文选题：桥梁工程　切入点：气候变化　出处：《北京交通大学学报》2015年01期 　论文类型：期刊论文

【摘要】：气候变化引起的全球大气中CO2浓度的升高,加速了钢筋混凝土(RC)结构的劣化.针对《混凝土耐久性设计规范》中规定的碳化环境(Ⅰ类环境),评估了未来气候变化对中国RC结构在正常使用极限状态下时变可靠度的影响.研究显示:未来气候变化使中国RC结构的平均碳化深度增大20%~40%,降低了RC结构的碳化侵蚀可靠度.到2100年,混凝土结构耐久性设计规范中Ⅰ类环境下Ⅰ-A、Ⅰ-B环境作用等级的耐久性规定不能够适应气候变化对中国钢筋混凝土结构的耐久性影响.
[Abstract]:The increase in CO2 concentrations in the global atmosphere caused by climate change, The deterioration of reinforced concrete (RC) structures is accelerated. In view of the carbonation environment specified in the concrete durability Design Code (Class I), the time varying of future climate change for RC structures in China under the normal service limit state is evaluated. Research shows that future climate change will increase the average carbonation depth of RC structures in China by 20 or 40 percent, reducing the reliability of carbon erosion of RC structures by 2100. In the durability design code for concrete structures, the durability regulations of class 鈪，

本文编号：1649724