建筑结构学报2017，Vol.38Issue(12)：114-121,8.DOI:10.14006/j.jzjgxb.2017.12.013
高温后带肋钢筋与混凝土黏结滑移关系预测模型
Prediction model of bond-slip relationship between steel bar and concrete after high temperatures
摘要
Abstract
Abstraet:A prediction model for bond-slip relationship between steel bar and concrete after high temperature is proposed.According to the failure characteristics of pull out test,the ascending branch of bond-slip relationship curve is divided into two stages considering concrete cracking or not,mechanical models are established respectively with the purpose of revealing the wedging action bond mechanism.According to the national standard,the relationship between the rib space and the diameter of the steel bar is summarized.The characteristic slippage after high temperature with the rib spacing as the main parameter is proposed.It is found that the descending of bond-slip relationship curve is in accordance with the negative exponential decay law.In addition to the effect of high temperature,the changing interface slip-path is also an important factor affecting the bond-slip relationship.Comparison with the experimental results has shown that the proposed model could precisely predict the bond-slip relationship of specimens with stirrup and short buried reinforcement.关键词
钢筋混凝土/高温后/黏结滑移/锥楔作用/弹性理论Key words
reinforced concrete/after high temperatures/bond-slip/wedging action/elastic theory分类
建筑与水利引用本文复制引用
赵卫平,朱彬荣,王丹..高温后带肋钢筋与混凝土黏结滑移关系预测模型[J].建筑结构学报,2017,38(12):114-121,8.基金项目
国家自然科学基金项目(51474218),教育部中央高校基本科研业务费专项(2011QL05). （51474218）
