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
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
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参考文献[1] 谭清华，韩林海.火灾后和加固后型钢混凝土柱的力学性能分析[J].清华大学学报(自然科学版),2013(1):12-17.
[2] 张超，薛素铎，王广勇，等.火灾后型钢混凝土框架结构力学性能试验研究及分析[J].工程力学，2018,35(5):152-161.
[3] 韩建.预应力型钢混凝土梁火灾后的力学性能试验研究[D].济南：山东建筑大学，2011.
[4] 王卫华.钢管混凝土柱-钢筋混凝土梁平面框架结构耐火性能研究[D].福州：福州大学，2009.
[5] CHIANG C H,TSAI C L.Time-temperature analysis of bond strength of a reba after fire exposure[J].Cement and Concrete Research,2003,33(10):1651-1654.
[6] HADDAD R H,SHANNIS L G.Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel[J].Construction and Building Materials,2004,18(6):425-435.
[7] 李红，李新忠.高温下钢板与混凝土的粘结强度[J].陕西工学院学报，2003,19(3):42-45.
[8] 蒋首超，李国强，李明菲.高温下压型钢板-混凝土粘结强度的试验[J].同济大学学报，2003,31(3):273-276.
[9] 薛建阳，赵鸿铁.型钢混凝土粘结滑移理论及其工程应用[J].北京：科学出版社，2007.
[10] 杨勇.型钢混凝土粘结滑移基本理论及应用研究[D].西安：西安建筑科技大学，2005.
[11] 杨勇，郑山锁，薛建阳.型钢-混凝土粘结机理的探讨[J].西安科技学院学报，2001,21(2):118-122.
[12] 袁广林，郭操，吕志涛.高温下钢筋混凝土粘结性能的试验与分析[J].工业建筑，2006,36 (2):57-60.
[13] 孙国良，王英杰.劲性砼柱端部轴力传递性能的试验研究与计算[J].建筑结构学报，1989(6):40-49.
[14] 郑山锁，杨勇，薛建阳，等.型钢混凝土粘结滑移性能研究[J].土木工程学报，2002,35(4):47-51.
[2] 张超，薛素铎，王广勇，等.火灾后型钢混凝土框架结构力学性能试验研究及分析[J].工程力学，2018,35(5):152-161.
[3] 韩建.预应力型钢混凝土梁火灾后的力学性能试验研究[D].济南：山东建筑大学，2011.
[4] 王卫华.钢管混凝土柱-钢筋混凝土梁平面框架结构耐火性能研究[D].福州：福州大学，2009.
[5] CHIANG C H,TSAI C L.Time-temperature analysis of bond strength of a reba after fire exposure[J].Cement and Concrete Research,2003,33(10):1651-1654.
[6] HADDAD R H,SHANNIS L G.Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel[J].Construction and Building Materials,2004,18(6):425-435.
[7] 李红，李新忠.高温下钢板与混凝土的粘结强度[J].陕西工学院学报，2003,19(3):42-45.
[8] 蒋首超，李国强，李明菲.高温下压型钢板-混凝土粘结强度的试验[J].同济大学学报，2003,31(3):273-276.
[9] 薛建阳，赵鸿铁.型钢混凝土粘结滑移理论及其工程应用[J].北京：科学出版社，2007.
[10] 杨勇.型钢混凝土粘结滑移基本理论及应用研究[D].西安：西安建筑科技大学，2005.
[11] 杨勇，郑山锁，薛建阳.型钢-混凝土粘结机理的探讨[J].西安科技学院学报，2001,21(2):118-122.
[12] 袁广林，郭操，吕志涛.高温下钢筋混凝土粘结性能的试验与分析[J].工业建筑，2006,36 (2):57-60.
[13] 孙国良，王英杰.劲性砼柱端部轴力传递性能的试验研究与计算[J].建筑结构学报，1989(6):40-49.
[14] 郑山锁，杨勇，薛建阳，等.型钢混凝土粘结滑移性能研究[J].土木工程学报，2002,35(4):47-51.
Experimental study on bond-slip behavior of steel reinforced concrete members after standard fire
Abstract: The bond-slip behavior of steel reinforced concrete members is fundamental for two materials with completely different properties, steel and concrete, to achieve work together under force. There are few studies on the bond properties of steel reinforced concrete specimens after high temperature. In order to study the bond-slip properties of steel reinforced concrete after fire, the push-out tests of 8 standard steel reinforced concrete specimens after fire(ISO-834) and 3 normal temperature comparison specimens were carried out. The effects of concrete strength grade, concrete protective layer thickness, 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 under normal temperature conditions, while the chemical bonding force contributes significantly reduced to the bonding force of the steel reinforced concrete after fire. After being exposed to fire, the stiffness and ultimate load of each specimen decreased significantly, but with the increase of fire time, the ultimate load actually increased. Under normal temperature conditions, the three factors of concrete strength grade, concrete protective layer thickness, and transverse hoop ratio are proportional to the bond strength. After being exposed to fire, the transverse hoop ratio has a significant effect on the ultimate 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
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