湿度影响下变形钢筋与混凝土粘结性能研究  

Study on Influence of Humidity on Bond Performance Between Deformed Steel Bars and Concrete

作　　者：刘鹏 LIU Peng(PowerChina Roadbridge Group CO.,LTD.,Beijing 100160,China)

机构地区：[1]中国电建路桥集团有限公司,北京100160

出　　处：《水电能源科学》2025年第1期61-64,共4页Water Resources and Power

摘　　要：为探究湿度对钢筋混凝土的影响,针对不同浸泡时间下钢筋混凝土试件开展拉拔试验,并通过数字图像技术(DIC)分析钢筋混凝土在不同湿度下的破坏过程。根据破坏过程和粘结参数的变化,反映孔隙水对钢筋混凝土粘结性能的影响。同时,对Nielsen粘接强度模型进行修正,通过拟合得出了湿态混凝土粘结应力计算公式。研究成果可为水环境影响下钢筋混凝土结构的力学性能评估提供依据。In order to explore the influence of humidity on the mechanical properties of concrete,this study conducted pull-out tests on steel-concrete specimens at different immersion times and analyzed the failure process of steel-concrete at different humidities using Digital Image Correlation(DIC)technology.The changes in the failure process and bonding pa-rameters reflect the influence of pore water on the bonding performance of steel-concrete.At the same time,this study made modifications to the bonding strength model proposed by Nielsen,and obtained a formula for calculating the bond-ing stress of wet concrete through fitting.The research results can provide a basis for the evaluation of mechanical prop-erties of reinforced concrete structures under the influence of water environment.

关 键 词：湿态钢筋混凝土 粘结性能 数值模拟 数字图像相关方法 

分 类 号：TV332[水利工程—水工结构工程]