上海地区在役斜拉桥混凝土构件的碳化深度分析及预测  

Analysis and Prediction of Carbonation Depth of Concrete Components of In-service Cable-stayed Bridges in ShanghaI

作　　者：王晓宇 WANG Xiaoyu

机构地区：[1]上海浦江桥隧运营管理有限公司,上海200231

出　　处：《上海公路》2021年第3期78-81,M0006,M0007,共6页Shanghai Highways

摘　　要：混凝土碳化是诱发混凝土构件中钢筋锈蚀的重要因素之一。为了研究混凝土碳化对钢筋混凝土结构耐久性的影响,选择了南浦大桥、杨浦大桥和徐浦大桥三座上海地区在役斜拉桥。基于2013年至2019年的碳化深度检测数据,分析了碳化深度和碳化系数随时间的变化趋势,并对100年设计使用年限的碳化过程进行了预测。研究成果可为上海地区大跨度斜拉桥的耐久性分析提供参考。Concrete carbonation is one of the important factors that induce the rebar corrosion in concrete components.To study the influence of concrete carbonation on the durability of reinforced concrete structures,three in-service cable-stayed bridges in Shanghai,i.e.,Nanpu Bridge,Yangpu Bridge and Xupu Bridge,were selected.Based on the inspection data of the carbonation depth from 2013 to2019,the variation tendency of the carbonation depth and carbonation coefficient with time was analyzed,and the carbonation process during the design service life of 100 years was predicted.The research results could provide reference for the durability analysis of longspan cable-stayed bridges in Shanghai.

关 键 词：混凝土 耐久性 碳化深度 碳化系数 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U445.57[交通运输工程—道路与铁道工程]