基于电流密度的锈蚀钢筋混凝土梁承载力  

Strength of corrosion-beam based on electric density

作　　者：张建仁[1] 李琛[1] 王磊[1] 

机构地区：[1]长沙理工大学土木与建筑工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2008年第4期27-31,95,共6页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50878031);交通部西部交通建设科技项目(200631800019);湖南省应用基础研究重点项目(06FJ2008)

摘　　要：对48根加速锈蚀的钢筋混凝土梁进行试验,研究锈蚀后钢筋混凝土梁的承载力退化规律.结合钢筋混凝土有限元的计算结果,归纳出基于锈蚀率锈蚀钢筋混凝土梁协同工作系数与综合折减系数的表达式.以电化学的法拉第定律为基本原理,提出了一种基于钢筋内部电流密度的承载力计算方法,通过该方法可对锈蚀构件的承载力、钢筋内部电流密度限值进行分析.48 reinforced concrete beam specimens subjected to a varying degree of accelerated corrosion were experimentally tested to investigate the strengths of corrosion-beams. Combined with results computed by using the finite element method, coordination coefficient and combined reduction coefficient were obtained. Based on the Faraday＇s law in electrochemistry, a method to determine strength of corrode-beam based on electric density in the bar was presented. Based on the suggested method, the strength of corrosion-beams and the limitation of corrosion current density in the bar can be analyzed.

关 键 词：锈蚀钢筋混凝土梁承载力 协同工作系数 综合折减系数 法拉第定律 钢筋内部电流密度 

分 类 号：TU443[建筑科学—岩土工程]