高温后HRB500钢筋与混凝土黏结性能退化研究
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摘要
为研究高温对HRB500钢筋与混凝土黏结性能的影响,通过25个中心拔出试验,研究不同温度作用后(20,200,400,600和800℃)HRB500钢筋与混凝土的黏结性能退化规律。研究结果表明:随着温度升高,HRB500钢筋与混凝土间黏结强度、黏结刚度逐渐下降,极限黏结应力对应的滑移量在600℃前有所减小,600℃后逐渐增加。与普通钢筋相比,高温后HRB500钢筋与混凝土间黏结强度下降更为缓慢。基于试验结果,分析了高温对混凝土抗压强度、HRB500钢筋残余强度、HRB500钢筋与混凝土黏结强度的影响,回归获得高温后混凝土抗压强度、高强钢筋残余强度与黏结强度的关系式,并建立高温后HRB500钢筋与混凝土的黏结应力-滑移本构方程。
The influence of material properties on bond strength between HRB500 reinforcing bar and concrete after high temperatures exposure are investigated extensively using pullout tests. The strength degradation of bonding strength between HRB500 reinforcing bar and concrete is studied systematically after the specimens being exposed to 20, 200, 400, 600 and 800 ℃. Experimental results indicated that the bond strength between HRB500 reinforcing bar and concrete decreases with increasing temperature, but the corresponding slip of bond strength decrease when temperature is below 600 ℃, and then rises when temperature exceed 600 ℃. The deterioration of bond strength between HRB500 reinforcing bar and concrete is more sensitive than that of the specimen with normal reinforcing bar. Based on the test results, the variation law of compressive strength of concrete, residual strength of steel bars and bond strength between steel bars and concrete were analyzed after the specimens being exposed to high temperatures. Besides, the bond-slip constitutive equation with considered temperature influence was proposed based on regression analysis.
The influence of material properties on bond strength between HRB500 reinforcing bar and concrete after high temperatures exposure are investigated extensively using pullout tests. The strength degradation of bonding strength between HRB500 reinforcing bar and concrete is studied systematically after the specimens being exposed to 20, 200, 400, 600 and 800 ℃. Experimental results indicated that the bond strength between HRB500 reinforcing bar and concrete decreases with increasing temperature, but the corresponding slip of bond strength decrease when temperature is below 600 ℃, and then rises when temperature exceed 600 ℃. The deterioration of bond strength between HRB500 reinforcing bar and concrete is more sensitive than that of the specimen with normal reinforcing bar. Based on the test results, the variation law of compressive strength of concrete, residual strength of steel bars and bond strength between steel bars and concrete were analyzed after the specimens being exposed to high temperatures. Besides, the bond-slip constitutive equation with considered temperature influence was proposed based on regression analysis.
引文
[1]Ergün A,KürklüG,Ba?p?nar M S.The effects of material properties on bond strength between reinforcing bar and concrete exposed to high temperature[J].Construction&Building Materials,2016(112):691-698.
[2]朱伯龙,陆洲导,胡克旭.高温(火灾)下混凝土与钢筋的本构关系[J].四川建筑科学研究,1990(1):37-43.ZHU Bolong,LU Zhoudao,HU Kexu.The constitutive relationship of concrete and steel bar under high temperatures[J].Sichuan Institute of Building Science,1990(1):37-43.
[3]Diederichs U,Schneider U.Bond strength at high temperatures[J].Magazine of Concrete Research,1981,33(115):75-84.
[4]牛向阳,王全凤,杨勇新,等.高温后普通混凝土与细晶粒钢筋粘结性能试验研究[J].建筑结构,2012(3):116-118.NIU Xiangyang,WANG Quanfeng,YANG Yongxin,et al.Experimental study on bond-anchorage properties of fine grain steel bars in common concrete after high temperature[J].Building Structure,2012(3):116-118.
[5]Bing?l A F,Gül R.Residual bond strength between steel bars and concrete after elevated temperatures[J].Fire Safety Journal,2009,44(6):854-859.
[6]Rami H Haddad,Linda G Shannis.Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel[J].Construction and Building Materials,2004,18(6):425-435.
[7]YANG H,LAN W,QIN Y,et al.Evaluation of bond performance between deformed bars and recycled aggregate concrete after high temperatures exposure[J].Construction&Building Materials,2016(112):885-891.
[8]周新刚,吴江龙.高温后混凝土与钢筋粘结性能的试验研究[J].工业建筑,1995,25(5):37-40.ZHOU Xingang,WU Jianglong.Tests and analysis of bond performance between bars and concrete after exposed to high temperature[J].Industrial Construction,1995,25(5):37-40.
[9]吴昊,陈礼刚.高温后钢筋混凝土粘结性能试验研究[J].工业建筑,2010,40(2):105-108.WU Hao,CHEN Ligang.Tests and analysis of bond performance between bars and concrete after exposed to high temperature[J].Industrial Construction,2010,40(2):105-108.
[10]Haddad R H,Al-Saleh R J,Al-Akhras N M.Effect of elevated temperature on bond between steel reinforcement and fiber reinforced concrete[J].Fire Safety Journal,2008,43(5):334-343.
[11]毛达岭,刘立新,范丽.HRB500级钢筋粘结锚固性能的试验研究[J].工业建筑,2004,34(12):67-69.MAO Daling,LIU Lixin,FAN Li.Experimental study on bond-anchorage properties of HRB500 steel bars in concrete[J].Industrial Construction,2004,34(12):67-69.
[12]欧阳煜,赖校君.高强钢筋高强混凝土粘结性能的试验与分析[J].工业建筑,2007,37(5):77-81.OUYANG Yu,LAI Xiaojun.Experimental study on bonding properties between high strength reinforcing bar and high strength concrete[J].Industrial Construction,2007,37(5):77-81.
[13]胡玲,杨勇新,王全凤,等.HRBF500钢筋粘结锚固性能的试验研究[J].工业建筑,2009,39(11):13-16.HU Ling,YANG Yongxin,WANG Quanfeng,et al.Experimental study on bond anchorage properties of HRBF500 steel bars in concrete[J].Industrial Construction,2009,39(11):13-16.
[14]谢剑,韩超,宋晓程,等.高强钢筋与高强混凝土粘结锚固性能试验研究[J].建筑科学,2015,31(5):1-5.XIE Jian,HAN Chao,SONG Xiaocheng,et al.Experimental study on bonding properties between high strength reinforcing bar and high strength concrete[J].Building Science,2015,31(5):1-5.
[15]LI H T,Deeks A J,SU X Z.Experimental study on compressive bond anchorage properties of 500 MPa steel bars in concrete[J].Journal of Structural Engineering,2013,139(12):586-589.
[16]肖建庄,黄均亮,赵勇,等.高温后高性能混凝土和细晶粒钢筋间粘结性能[J].同济大学学报(自然科学版),2009,37(10):1296-1301.XIAO Jianzhuang,HUANG Junliang,ZHAO Yong,et al.On bond behavior between HPC and fine grain steel bar after elevated temperatures[J].Journal of Tongji University(Natural Science),2009,37(10):1296-1301.
[17]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.YUAN Guanglin,GUO Chao,LüZhitao.Experimental study on bond performance of reinforced concrete after being heated at high temperature[J].Industrial Construction,2006,36(2):57-60.
[18]LI Q,HUANG X,HUANG Z,et al.Bond characteristics between early aged fly ash concrete and reinforcing steel bar after fire[J].Construction&Building Materials,2017,147:701-712.
[19]余志武,丁发兴,罗建平.高温后不同类型混凝土力学性能试验研究[J].安全与环境学报,2005,5(5):1-6.YU Zhiwu,DING Faxing,LUO Jianping.Experimental research on mechanical properties of different type of concrete after high temperature[J].Journal of Safety and Environment,2005,5(5):1-6.
[20]梁爱莉,张倩茜,袁广林,等.混凝土高温后抗压强度的影响因素研究[J].煤炭学报,2010(12):2049-2052.LIANG Aili,ZHANG Qianxi,YUAN Guanglin,et al.Study on the influencing factors of concrete compressive strength after elevated temperature[J].Journal of China Coal Society,2010(12):2049-2052.
[21]吴波,袁杰,王光远.高温后高强混凝土力学性能的试验研究[J].土木工程学报,2000,33(2):8-12.WU Bo,YUAN Jie,WANG Guangyuan.Experimental study on the mechanical properties of HSC after high temperature[J].China Civil Engineering Journal,2000,33(2):8-12.
[22]翟越,艾晓芹,邓子辰,等.受火温度和冷却方式对混凝土抗压强度影响[J].湖南大学学报(自然科学版),2014,41(11):74-80.ZHAI Yue,AI Xiaoqin,DENG Zichen,et al.Influences of cooling mode and high temperature on concrete compressive strength[J].Journal of Hunan University(Natural Sciences),2014,41(11):74-80.
[23]郑文忠,罗百福,王英.高温下复掺纤维RPC立方体抗压性能研究[J].湖南大学学报(自然科学版),2012,39(11):13-19.ZHENG Wenzhong,LUO Baifu,WANG Ying.Compressive properties of cubes reactive powder concrete with hybrid fibers at elevated temperature[J].Journal of Hunan University(Natural Sciences),2012,39(11):13-19.
[24]LIN W M,LIN T D,Powers-Couche L J.Microstructure of fire-damaged concrete[J].Aci Materials Journal,1996,93(3):199-205.
[25]BodnárováL,Zach J,HroudováJ,et al.Methods for determination of the quality of concretes with respect to their high temperature behavior[J].Procedia Engineering,2013(65):260-265.
[26]Alavi-Fard M,Marzouk H.Bond of high-strength concrete under monotonic pull-out loading[J].Magazine of Concrete Research,2004,56(9):545-557.
[27]余志武,王中强,史召锋.高温后新Ⅲ级钢筋力学性能的试验研究[J].建筑结构学报,2005,26(2):112-116.YU Zhiwu,WANG Zhongqiang,SHI Zhaofeng.Experimental research on mechanical properties of newⅢgrade steel bars after fire[J].Journal of Building Structures,2005,26(2):112-116.
[28]王全凤,吴红翠,徐玉野,等.高温后HRBF500细晶粒钢筋力学性能试验研究[J].建筑结构学报,2011,32(2):120-125.WANG Quanfeng,WU Hongcui,XU Yuye,et al.Experimental research on material properties of HRBF500 after high temperature[J].Journal of Building Structures,2011,32(2):120-125.
[29]吴波,梁悦欢.高温后混凝土和钢筋强度的统计分析[J].华南理工大学学报(自然科学版),2008,36(12):13-20.WU Bo,LIANG Yuehuan.Statistic analysis of strengths of concrete and steel bars at elevated temperature treatment[J].Journal of South China University of Technology(Natural Sciences),2008,36(12):13-20.
[30]沈蓉,凤凌云,戎凯.高温(火灾)后钢筋力学性能的评估[J].四川建筑科学研究,1991(2):5-9.SHEN Rong,FENG Lingyun,RONG Kai.Evaluation of mechanical properties of steel after high temperature(fire)[J].Sichuan Institute of Building Science,1991(2):5-9.
[31]Prince M J R,Singh B.Bond behavior of normal-and high-strength recycled aggregate concrete[J].Structural Concrete,2015,16(1):56-70.
[32]XIAO J,Falkner H.Bond behavior r between recycled aggregate concrete and steel rebars[J].Construction&Building Materials,2007,21(2):395-401.
[2]朱伯龙,陆洲导,胡克旭.高温(火灾)下混凝土与钢筋的本构关系[J].四川建筑科学研究,1990(1):37-43.ZHU Bolong,LU Zhoudao,HU Kexu.The constitutive relationship of concrete and steel bar under high temperatures[J].Sichuan Institute of Building Science,1990(1):37-43.
[3]Diederichs U,Schneider U.Bond strength at high temperatures[J].Magazine of Concrete Research,1981,33(115):75-84.
[4]牛向阳,王全凤,杨勇新,等.高温后普通混凝土与细晶粒钢筋粘结性能试验研究[J].建筑结构,2012(3):116-118.NIU Xiangyang,WANG Quanfeng,YANG Yongxin,et al.Experimental study on bond-anchorage properties of fine grain steel bars in common concrete after high temperature[J].Building Structure,2012(3):116-118.
[5]Bing?l A F,Gül R.Residual bond strength between steel bars and concrete after elevated temperatures[J].Fire Safety Journal,2009,44(6):854-859.
[6]Rami H Haddad,Linda G Shannis.Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel[J].Construction and Building Materials,2004,18(6):425-435.
[7]YANG H,LAN W,QIN Y,et al.Evaluation of bond performance between deformed bars and recycled aggregate concrete after high temperatures exposure[J].Construction&Building Materials,2016(112):885-891.
[8]周新刚,吴江龙.高温后混凝土与钢筋粘结性能的试验研究[J].工业建筑,1995,25(5):37-40.ZHOU Xingang,WU Jianglong.Tests and analysis of bond performance between bars and concrete after exposed to high temperature[J].Industrial Construction,1995,25(5):37-40.
[9]吴昊,陈礼刚.高温后钢筋混凝土粘结性能试验研究[J].工业建筑,2010,40(2):105-108.WU Hao,CHEN Ligang.Tests and analysis of bond performance between bars and concrete after exposed to high temperature[J].Industrial Construction,2010,40(2):105-108.
[10]Haddad R H,Al-Saleh R J,Al-Akhras N M.Effect of elevated temperature on bond between steel reinforcement and fiber reinforced concrete[J].Fire Safety Journal,2008,43(5):334-343.
[11]毛达岭,刘立新,范丽.HRB500级钢筋粘结锚固性能的试验研究[J].工业建筑,2004,34(12):67-69.MAO Daling,LIU Lixin,FAN Li.Experimental study on bond-anchorage properties of HRB500 steel bars in concrete[J].Industrial Construction,2004,34(12):67-69.
[12]欧阳煜,赖校君.高强钢筋高强混凝土粘结性能的试验与分析[J].工业建筑,2007,37(5):77-81.OUYANG Yu,LAI Xiaojun.Experimental study on bonding properties between high strength reinforcing bar and high strength concrete[J].Industrial Construction,2007,37(5):77-81.
[13]胡玲,杨勇新,王全凤,等.HRBF500钢筋粘结锚固性能的试验研究[J].工业建筑,2009,39(11):13-16.HU Ling,YANG Yongxin,WANG Quanfeng,et al.Experimental study on bond anchorage properties of HRBF500 steel bars in concrete[J].Industrial Construction,2009,39(11):13-16.
[14]谢剑,韩超,宋晓程,等.高强钢筋与高强混凝土粘结锚固性能试验研究[J].建筑科学,2015,31(5):1-5.XIE Jian,HAN Chao,SONG Xiaocheng,et al.Experimental study on bonding properties between high strength reinforcing bar and high strength concrete[J].Building Science,2015,31(5):1-5.
[15]LI H T,Deeks A J,SU X Z.Experimental study on compressive bond anchorage properties of 500 MPa steel bars in concrete[J].Journal of Structural Engineering,2013,139(12):586-589.
[16]肖建庄,黄均亮,赵勇,等.高温后高性能混凝土和细晶粒钢筋间粘结性能[J].同济大学学报(自然科学版),2009,37(10):1296-1301.XIAO Jianzhuang,HUANG Junliang,ZHAO Yong,et al.On bond behavior between HPC and fine grain steel bar after elevated temperatures[J].Journal of Tongji University(Natural Science),2009,37(10):1296-1301.
[17]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.YUAN Guanglin,GUO Chao,LüZhitao.Experimental study on bond performance of reinforced concrete after being heated at high temperature[J].Industrial Construction,2006,36(2):57-60.
[18]LI Q,HUANG X,HUANG Z,et al.Bond characteristics between early aged fly ash concrete and reinforcing steel bar after fire[J].Construction&Building Materials,2017,147:701-712.
[19]余志武,丁发兴,罗建平.高温后不同类型混凝土力学性能试验研究[J].安全与环境学报,2005,5(5):1-6.YU Zhiwu,DING Faxing,LUO Jianping.Experimental research on mechanical properties of different type of concrete after high temperature[J].Journal of Safety and Environment,2005,5(5):1-6.
[20]梁爱莉,张倩茜,袁广林,等.混凝土高温后抗压强度的影响因素研究[J].煤炭学报,2010(12):2049-2052.LIANG Aili,ZHANG Qianxi,YUAN Guanglin,et al.Study on the influencing factors of concrete compressive strength after elevated temperature[J].Journal of China Coal Society,2010(12):2049-2052.
[21]吴波,袁杰,王光远.高温后高强混凝土力学性能的试验研究[J].土木工程学报,2000,33(2):8-12.WU Bo,YUAN Jie,WANG Guangyuan.Experimental study on the mechanical properties of HSC after high temperature[J].China Civil Engineering Journal,2000,33(2):8-12.
[22]翟越,艾晓芹,邓子辰,等.受火温度和冷却方式对混凝土抗压强度影响[J].湖南大学学报(自然科学版),2014,41(11):74-80.ZHAI Yue,AI Xiaoqin,DENG Zichen,et al.Influences of cooling mode and high temperature on concrete compressive strength[J].Journal of Hunan University(Natural Sciences),2014,41(11):74-80.
[23]郑文忠,罗百福,王英.高温下复掺纤维RPC立方体抗压性能研究[J].湖南大学学报(自然科学版),2012,39(11):13-19.ZHENG Wenzhong,LUO Baifu,WANG Ying.Compressive properties of cubes reactive powder concrete with hybrid fibers at elevated temperature[J].Journal of Hunan University(Natural Sciences),2012,39(11):13-19.
[24]LIN W M,LIN T D,Powers-Couche L J.Microstructure of fire-damaged concrete[J].Aci Materials Journal,1996,93(3):199-205.
[25]BodnárováL,Zach J,HroudováJ,et al.Methods for determination of the quality of concretes with respect to their high temperature behavior[J].Procedia Engineering,2013(65):260-265.
[26]Alavi-Fard M,Marzouk H.Bond of high-strength concrete under monotonic pull-out loading[J].Magazine of Concrete Research,2004,56(9):545-557.
[27]余志武,王中强,史召锋.高温后新Ⅲ级钢筋力学性能的试验研究[J].建筑结构学报,2005,26(2):112-116.YU Zhiwu,WANG Zhongqiang,SHI Zhaofeng.Experimental research on mechanical properties of newⅢgrade steel bars after fire[J].Journal of Building Structures,2005,26(2):112-116.
[28]王全凤,吴红翠,徐玉野,等.高温后HRBF500细晶粒钢筋力学性能试验研究[J].建筑结构学报,2011,32(2):120-125.WANG Quanfeng,WU Hongcui,XU Yuye,et al.Experimental research on material properties of HRBF500 after high temperature[J].Journal of Building Structures,2011,32(2):120-125.
[29]吴波,梁悦欢.高温后混凝土和钢筋强度的统计分析[J].华南理工大学学报(自然科学版),2008,36(12):13-20.WU Bo,LIANG Yuehuan.Statistic analysis of strengths of concrete and steel bars at elevated temperature treatment[J].Journal of South China University of Technology(Natural Sciences),2008,36(12):13-20.
[30]沈蓉,凤凌云,戎凯.高温(火灾)后钢筋力学性能的评估[J].四川建筑科学研究,1991(2):5-9.SHEN Rong,FENG Lingyun,RONG Kai.Evaluation of mechanical properties of steel after high temperature(fire)[J].Sichuan Institute of Building Science,1991(2):5-9.
[31]Prince M J R,Singh B.Bond behavior of normal-and high-strength recycled aggregate concrete[J].Structural Concrete,2015,16(1):56-70.
[32]XIAO J,Falkner H.Bond behavior r between recycled aggregate concrete and steel rebars[J].Construction&Building Materials,2007,21(2):395-401.