（1建筑安全监测北京市工程技术研究中心,北京 100044，2北京建筑工程学院,北京 100044）

[摘要]钢筋与混凝土的高温粘结性能是确定结构构件高温下极限承载力、高温后残余承载力以及构件修复加固设计的基础。本文通过设计钢筋中心拔出试验，研究了经历不同温度后钢筋和混凝土粘结性能的变异，分析和讨论了钢筋直径、锚固长度、温度等因素对混凝土与钢筋粘结性能的影响。论文得到的相关结论对结构构件抗火设计和火灾后的加固研究具有一定的指导意义。

[关键词]高温;混凝土;钢筋;粘结性能

中图分类号：TU375      文献标识码：A      文章编号：1002-848X(2013)S1-1475-04

Research of bond performance between bars and concrete after exposed to high temperature

Tang Ruirui^1,2, Xie Fudi^1,2, Liu Dongdong^1,2

(1 Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing 100044, China;2 Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

Abstract: An understanding of bonding performance between steel bar and concrete is the prerequisite for research of concrete's ultimate bearing capacity under high temperature, residual bearing capacity after high temperature and the structural member's repair and strengthening. In this paper, by way of a central pull-out test, the bond performance between bars and concrete after exposed to different high temperature were tested and investigated. Based on the measured bond stress after exposed to different high temperature, the influence of bar diameter, bond length, temperature etc. to bond behavior is analyzed and discussed. The corresponding conclusions in the paper have significance for structural member's fire-resistance design and strengthening after fire.

Keywords: high temperature; concrete; reinforce bar; bond