南京理工大学学报（自然科学版）2018，Vol.42Issue(2)：133-141,9.DOI:10.14177/j.cnki.32-1397n.2018.42.02.001
荷载-环境耦合作用下钢筋混凝土柱退化过程分析
Numerical investigation on degradation of reinforced concrete column subjected to coupling of loading and environment
摘要
Abstract
In order to investigate the bearing capacity degradation and the stress redistribution at the cross section of the reinforced concrete column under the coupling actions of loading and environ-ment,based on the Kent-Park constitutive model,the time-dependent corrosion constitutive model of concrete is established according to the sulfate-induced concrete degradation mechanism. On the chloride-induced steel corrosion mechanism,the calculation formula of the effective cross-sectional area of corroded steel is presented. Finally,the fiber model is used to simulate the capacity and the stress of the cross section in the reinforced concrete column. Numerical results show that,with the increasing of corrosion time,the bearing capacity of the reinforced concrete column decreases and there produces stress redistribution at its cross section;the stresses of the steel bar and uncorroded concrete increase and the stress of the corroded concrete gradually increases from surface to internal of the cross section of the column.关键词
钢筋混凝土柱/荷载/硫酸盐/氯盐/承载力退化/应力重分布Key words
reinforced concrete columns/loading/sulfate/chloride/bearing capacity degradation/stress redistribution分类
建筑与水利引用本文复制引用
孙香花,王佳林,左晓宝,殷光吉,汤玉娟..荷载-环境耦合作用下钢筋混凝土柱退化过程分析[J].南京理工大学学报（自然科学版）,2018,42(2):133-141,9.基金项目
国家自然科学基金(51378262 （）
51778297) （）
