(1 湖北建科国际工程有限公司， 武汉 430070； 2 西悉尼大学基础工程中心， Penrith NSW 2751；3 清华大学土木工程系， 北京 100084； 4 福州大学土木工程学院， 福州 350108)

摘要: 型钢混凝土构件的粘结滑移性能是型钢与混凝土两种性质完全不同的材料能够共同受力协同工作的基础。 高温后型钢混凝土试件粘结性能的研究比较少。 为了研究火灾作用后型钢混凝土的粘结滑移性能，进行了 8个标准火灾(ISO￣834)作用后型钢混凝土试件及 3 个常温对比试件的推出试验。 通过试验考察了混凝土强度等级、混凝土保护层厚度、横向配箍率和受火时间等因素对粘结滑移性能的影响。 结果表明:常温工况型钢混凝土的粘结力中，化学胶结力贡献较大；而受火后型钢混凝土的粘结力中，化学胶结力贡献明显减小。 受火作用后，各试件刚度和极限荷载大幅降低，但是随着受火时间的增长，极限荷载反而有所增加。 常温工况下，混凝土强度等级、混凝土保护层厚度、横向配箍率三个因素与粘结强度呈正比例关系。 受火作用后，横向配箍率对极限粘结强度的影响显著，而其他各参数的影响则不明显。

关键词: 标准火灾； 型钢混凝土； 粘结滑移性能； 推出试验； 粘结强度

中图分类号:TU398. 7 文献标志码:A 文章编号:1002￣848X(2022)06￣0111￣08

DOI:10. 19701 / j.jzjg.20200582

Experimental study on bond￣slip behavior of steel reinforced concrete members after standard fire

ZHANG Huajun1， TAO Zhong2， HAN Linhai3， WANG Zhibin4

(1 Hubei Jianke International Engineering Co.， Ltd.， Wuhan 430070， China； 2 Western Sydney University Centrefor Infrastructure Engineering， Penrith NSW 2751， Australia； 3 Department of Civil Engineering， Tsinghua University，Beijing 100084， China； 4 College of Civil Engineering， Fuzhou University， Fuzhou 350108， China)

Abstract: The bond￣slip behavior of steel reinforced concrete members is fundamental for two materials with completelydifferent properties， steel and concrete， to achieve work together under force. There are few studies on the bond propertiesof steel reinforced concrete specimens after high temperature. In order to study the bond￣slip properties of steel reinforcedconcrete after fire， the push￣out tests of 8 standard steel reinforced concrete specimens after fire ( ISO￣834) and 3 normaltemperature comparison specimens were carried out. The effects of concrete strength grade， concrete protective layerthickness， transverse hoop ratio and fire exposure time on the bond￣slip properties were investigated through experiments.The results show that the chemical bonding force contributes more to the bonding force of the steel reinforced concrete undernormal temperature conditions， while the chemical bonding force contributes significantly reduced to the bonding force ofthe steel reinforced concrete after fire. After being exposed to fire， the stiffness and ultimate load of each specimendecreased significantly， but with the increase of fire time， the ultimate load actually increased. Under normal temperatureconditions， the three factors of concrete strength grade， concrete protective layer thickness， and transverse hoop ratio areproportional to the bond strength. After being exposed to fire， the transverse hoop ratio has a significant effect on theultimate bond strength， while the effects of other parameters are not obvious.

Keywords:standard fire； steel reinforced concrete； bond￣slip behavior； push￣out test； bond strength

第一作者:张华军，硕士，高级工程师，注册土木工程师(岩土)，主要从事建筑结构、地下空间、地铁、基坑、边坡、隧道、地基处理等方面的研究，Email:56277949@ qq.com。

[引用本文] 张华军，陶忠，韩林海，等. 标准火灾作用后型钢混凝土构件的粘结滑移性能试验研究[ J]. 建筑结构，2022，52(6):111￣118，110. ZHANG Huajun，TAO Zhong，HAN Linhai，et al. Experimental study on bond￣slip behaviorof steel reinforced concrete members after standard fire[J]. Building Structure，2022，52(6):111￣118，110.