再生混凝土-钢筋黏结锚固可靠度设计
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摘要
通过66个同强度、不同再生粗骨料取代率的钢筋-混凝土中心拉拔试验,研究不同再生粗骨料取代率、相对保护层厚度、配箍率等参数对再生混凝土与钢筋黏结强度的影响。统计目前国内外892个钢筋-再生混凝土中心拉拔试验结果以及336个再生混凝土抗压强度,建立极限黏结强度计算公式。基于与普通混凝土同水灰比和同强度这2种再生混凝土设计标准,采用Monte Carlo法进行再生混凝土-钢筋黏结锚固可靠度计算,并提出相应的锚固长度设计建议。研究结果表明:同强度再生混凝土锚固长度设计可直接按GB50010—2010"普通混凝土结构设计规范"进行,而同水灰比再生混凝土锚固长度则应在普通钢筋混凝土锚固设计长度基础上适当考虑提高10%～15%。
66 pull-out specimens containing different levels of recycled coarse aggregate(RCA) were fabricated to study the effect of RCA replacement, layer thickness, stirrups ratios on the bond strength between recycled concrete(RC) and steel rebar. Results from 892 pull-out tests and 336 compressive tests were statistically analyzed. The formula of ultimate bond strength between RC and steel rebar was established. Two kinds of design standard were considered for RC mixture,i.e., the mixture of RC was directly designed as conventional concrete(CC), or it was designed to get a comparable compressive strength with CC. The Monte Carlo method was adopted to calculate the reliability and the anchorage length of reinforced RC based on the two kinds of design methods. The results show that the anchorage length of CC suggested in Chinese code GB 50010—2010 is applicable for RC design to get a comparable compressive strength with CC, but the anchorage length of RC designed as CC should be increased by 10%-15% compared with that of CC.
66 pull-out specimens containing different levels of recycled coarse aggregate(RCA) were fabricated to study the effect of RCA replacement, layer thickness, stirrups ratios on the bond strength between recycled concrete(RC) and steel rebar. Results from 892 pull-out tests and 336 compressive tests were statistically analyzed. The formula of ultimate bond strength between RC and steel rebar was established. Two kinds of design standard were considered for RC mixture,i.e., the mixture of RC was directly designed as conventional concrete(CC), or it was designed to get a comparable compressive strength with CC. The Monte Carlo method was adopted to calculate the reliability and the anchorage length of reinforced RC based on the two kinds of design methods. The results show that the anchorage length of CC suggested in Chinese code GB 50010—2010 is applicable for RC design to get a comparable compressive strength with CC, but the anchorage length of RC designed as CC should be increased by 10%-15% compared with that of CC.
引文
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[26]马静,王振波.再生混凝土的基本性能研究[J].混凝土与水泥制品,2012,3(3):18-21.MA Jing,WANG Zhengbo.Study on basic properties of recycled concrete[J].China Concrete and Cement Products,2012,3(3):18-21.
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[28]张亚梅,秦鸿根,孙伟,等.再生混凝土配合比设计初探[J].混凝土与水泥制品,2002(1):7-9.ZHANG Yamei,QIN Honggen,SUN Wei,et al.Preliminary study on mix proportion design of recycled concrete[J].Concrete and Cement Products,2002(1):7-9.
[29]肖建庄,兰阳.再生粗骨料混凝土梁抗弯性能试验研究[J].特种结构,2006,23(1):9-12.XIAO Jiangzhuang,LANG Yang.Experimental study on flexural performance of recycled concrete beams[J].Special Structures,2006,23(1):9-12.
[30]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(7):1445-1452.XIAO Jianzhuang Experimental investigation on complete stress-strain curve of recycled concrete under uniaxial loading[J].Journal of Tongji University(Natural Science),2007,35(7):1445-1452.
[31]林俊.再生混凝土抗压和受弯性能研究[D].南宁:广西大学土木建筑工程学院,2007:28-40.LIN Jun.Experiment research on compressive strength of recycled concrete and performance of recycled reinforced concrete beam[D].Nanning:Guangxi University.College of Civil Engineering and Architecture,2007:28-40.
[32]赵军,邓志恒,林俊.再生混凝土配合比设计的试验研究[J].广西工学院学报,2007,9(3):80-84.ZHAO Jun,DENG Zhiheng,LIN Jun.Experimental study on mixture ratio design of recycled aggregate concrete[J].Journal of Guangxi Engineering College,2007,9(3):80-84.
[33]古松,雷挺,陶俊林.再生混凝土配合比设计及早期强度试验研究[J].工业建筑,2012,42(4):1-4.GU Song,LEI Ting,TAO Junlin.Experimental study on mix design and early strength of recycled aggregate[J].Industrial Construction,2012,42(4):1-4.
[34]徐蔚.再生粗骨料取代率对混凝土基本性能的影响[J].混凝土,2006(9):45-47.XU Wei.Experimental study on influence of recycled coarse aggregates contents on properties of recycled aggregate concrete[J].Concrete,2006(9):45-47.
[35]刘丰,白国良,柴园园,等.再生骨料混凝土抗压强度和抗剪强度试验研究[J].工业建筑,2010,40(12):70-74.LIU Feng,BAI Guoliang,CHAI Yuanyuan,et al.Experimental research on recycled aggregate concrete tensile and shear strength[J].Industrial Construction,2010,40(12):70-74.
[36]黄莹,邓志恒,罗延明,等.再生混凝土剪切性能试验研究[J].混凝土,2010(2):14-18.HUANG Ying,DENG Zheheng,LUO Yangming,et al.Experimental study on shear strength of recycled aggregate concrete[J].Concrete,2010(2):14-18.
[37]蒋业浩.再生混凝土抗压强度及配合比设计研究[D].南京:南京航空航天大学土木工程系,2006:32-39.JIANG Yehao.Research on compressive strength of recycled concrete and design of mix proportion[D].Nanjing:Nanjing University of Aeronautics&Astronautics.Department of Civil Engineering,2006:32-39.
[38]陈力.再生粗骨料混凝土梁受弯性能试验研究[D].南宁:广西大学土木工程学院,2013:17-27.CHEN Li.Experimental research on the flexural behavior of recycled coarse aggregate concrete beams[D].Nanning:Guangxi University College of Civil Engineering and Architecture,2013:17-27.
[39]杜婷,周玉峰,向卫平,等.高性能再生骨料混凝土的基本性能试验研究[J].武汉理工大学学报,2006,28(8):34-38.DU Ting,ZHOU Yufeng,XIANG Weiping et al.Experimental research on the basic behaviors of recycled high performance concrete[J].Journal of Wuhan University of Technology,2006,28(8):34-38.
[2]赵军.再生混凝土黏结锚固性能的试验研究[D].南宁:广西大学土木建筑工程学院,2008:31-36.ZHAO Jun.Tests and research on bond behavior between steel bar and recycled aggregate concrete[D].Nanning:Guangxi University.College of Civil Engineering and Architecture,2008:31-36.
[3]王博,白国良,吴淑海,等.再生混凝土极限黏结强度及钢筋锚固长度取值研究[J].工业建筑,2013,43(8):59-63.WANG Bo,BAI Guoliang,WU shuhai,et al.Study on ultimate bond strength and anchorage length of the rebar in the recycled aggregate concrete[J].Industrial Construction,2013,43(8):59-63.
[4]CHOI H B,KANG K I.Bond behaviour of deformed bars embedded in RAC[J].Magazine of Concrete Research,2008,60(6):399-410.
[5]KIM S W,YUN H D.Influence of recycled coarse aggregates on the bond behavior of deformed bars in concrete[J].Engineering Structures,2013,48:133-143.
[6]SEARA-PAZ S,GONZáLEZ-FONTEBOA B,EIRAS-LóPEZ J,et al.Bond behavior between steel reinforcement and recycled concrete[J].Materials and structures,2014,47(1/2):323-334.
[7]KIM S H,LEE S H,LEE Y T,et al.Bond between high strength concrete with recycled coarse aggregate and reinforcing bars[J].Materials Research Innovations,2014,18(S2):278-285.
[8]PRINCE M J R,SINGH B.Bond behaviour between recycled aggregate concrete and deformed steel bars[J].Materials and Structures,2014,47(3):503-516.
[9]XIAO J,FALKNER H.Bond behaviour between recycled aggregate concrete and steel rebars[J].Construction and Building Materials,2007,21(2):395-401.
[10]王晨霞,吴瑾,陈志辉.钢筋与再生混凝土黏结滑移性能的试验研究[J].土木工程学报,2013,46(S2):225-231.WANG Chenxia,WU Jin,CHEN Zhihui.Experimental research on bond behavior between recycled concrete and rebar[J].China Civil Engineering Journal,2013,46(S2):225-231.
[11]杨海涛,田石柱.钢筋与再生混凝土握裹力的试验研究[J].混凝土与水泥制品,2013,3(3):6-10.YANG Haitao,TIAN Shizhu.Experimental study of reinforced regeneration of concrete bond strength[J].China Concrete and Cement Product,2013,3(3):6-10.
[12]王根伟.钢筋与再生混凝土黏结特性试验研究[D].桂林:桂林理工大学土木与建筑工程学院,2012:39-50.WANG Genwei.Test and study on the bonding properties between steel bar and recycled aggregate concrete[D].Guilin:Guilin University of Technology.College of Civil Engineering and Architecture,2012:39-50.
[13]陈伟伟.再生混凝土黏结性能试验研究[D].哈尔滨:哈尔滨工业大学土木工程学院,2007:27-48.CHEN Weiwei.Experimental study on bonding properties of recycled[D].Harbin:Harbin Institute of Technology.College of Civil Engineering,2007:27-48.
[14]柯德强.再生骨料混凝土钢筋锚固性能试验研究[D].绵阳:西南科技大学土木建筑工程学院,2011:25-45.KE Deqiang.Research on experience of performance between steel bar and recycled aggregate concrete[D].Mianyang:Southwest University of Science and Technology.College of Civil Engineering and Architecture,2011:25-45.
[15]GUERRA M,CEIA F,DE BRITO J,et al.Anchorage of steel rebars to recycled aggregates concrete[J].Construction and Building Materials,2014,72:113-123.
[16]PRINCE M,SINGH B.Bond behaviour of normal-and high-strength recycled aggregate concrete[J].Structural Concrete,2015,16(1):56-70.
[17]PRINCE M,SINGH B.Investigation of bond behaviour between recycled aggregate concrete and deformed steel bars[J].Structural Concrete,2014,15(2):154-168.
[18]BRECCOLOTTI M,MATERAZZI A L.Structural reliability of bonding between steel rebars and recycled aggregate concrete[J].Construction and Building Materials,2013,47(5):927-934.
[19]徐有邻,邵卓民,沈文都.钢筋与混凝土的黏结锚固强度[J].建筑科学,1988(4):8-14.XU Youlin,SHAO Zhuomin,SHEN Wendu.Bond strength between reinforcing bars and concrete[J].Building Science,1988(4):8-14.
[20]李佳彬,肖建庄,黄健.再生粗骨料取代率对混凝土抗压强度的影响[J].建筑结构学报,2006,9(3):297-301.LI Jiabin,XIAO Jianzhuang,HUANG Jian.Influence of recycled coarse aggregate replacement percentages on compressive strength of concrete[J].Journal of Building Materials,2006,9(3):297-301.
[21]肖建庄,雷斌,袁飚.不同来源再生混凝土抗压强度分布特征研究[J].建筑结构学报,2006,9(5):94-100.XIAO Jianzhuang,LEI Bin,YUAN Biao.Compressive strength distribution of recycled aggregate concrete derived from different origins[J].Journal of Building Materials,2006,9(5):94-100.
[22]王涛.再生骨料强化及再生混凝土基本力学性能试验研究[D].青岛:山东科技大学土木建筑学院,2011:30-38.WANG Tao.Research on the basic strength features of recycled concrete aggregate and recycled concrete[D].Qingdao:Shangdong University of Science and Technology.College of Civil Engineering and Architecture,2011:30-38.
[23]肖祥.再生混凝土基本力学性能试验研究[D].青岛:山东科技大学土木建筑学院,2008:39-60.XIAO Xiang.Research on the basic strength features of recycled concrete[D].Qingdao:Shangdong University of Science and Technology.College of Civil Engineering and Architecture,2008:39-60.
[24]邢振贤,周曰农.再生混凝土的基本性能研究[J].华北水利水电学院学报,1998,19(2):30-32.XING Zhenxian,ZHOU Yuenong.Study on the main performance of regenerated concrete[J].Journal of North China Institute of Water Conservancy and Hydroelectric Power,1998,19(2):30-32.
[25]庞俭.再生骨料混凝土受力性能试验研究[D].西安:长安大学建筑工程学院,2010:34-37.PANG Jian.Experimental research on mechanical performance of recycled aggregate concrete[D].Xi’an:Changan University.College of Construction Engineering,2010:34-37.
[26]马静,王振波.再生混凝土的基本性能研究[J].混凝土与水泥制品,2012,3(3):18-21.MA Jing,WANG Zhengbo.Study on basic properties of recycled concrete[J].China Concrete and Cement Products,2012,3(3):18-21.
[27]祁兵.再生骨料混凝土力学性能试验研究[D].南京:东南大学土木工程学院,2013:33-38.QI Bing.Research on mechanical properties of recycled aggregate concrete[D].Nanjing:Southeast University.College of Civil Engineering,2013:33-38.
[28]张亚梅,秦鸿根,孙伟,等.再生混凝土配合比设计初探[J].混凝土与水泥制品,2002(1):7-9.ZHANG Yamei,QIN Honggen,SUN Wei,et al.Preliminary study on mix proportion design of recycled concrete[J].Concrete and Cement Products,2002(1):7-9.
[29]肖建庄,兰阳.再生粗骨料混凝土梁抗弯性能试验研究[J].特种结构,2006,23(1):9-12.XIAO Jiangzhuang,LANG Yang.Experimental study on flexural performance of recycled concrete beams[J].Special Structures,2006,23(1):9-12.
[30]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(7):1445-1452.XIAO Jianzhuang Experimental investigation on complete stress-strain curve of recycled concrete under uniaxial loading[J].Journal of Tongji University(Natural Science),2007,35(7):1445-1452.
[31]林俊.再生混凝土抗压和受弯性能研究[D].南宁:广西大学土木建筑工程学院,2007:28-40.LIN Jun.Experiment research on compressive strength of recycled concrete and performance of recycled reinforced concrete beam[D].Nanning:Guangxi University.College of Civil Engineering and Architecture,2007:28-40.
[32]赵军,邓志恒,林俊.再生混凝土配合比设计的试验研究[J].广西工学院学报,2007,9(3):80-84.ZHAO Jun,DENG Zhiheng,LIN Jun.Experimental study on mixture ratio design of recycled aggregate concrete[J].Journal of Guangxi Engineering College,2007,9(3):80-84.
[33]古松,雷挺,陶俊林.再生混凝土配合比设计及早期强度试验研究[J].工业建筑,2012,42(4):1-4.GU Song,LEI Ting,TAO Junlin.Experimental study on mix design and early strength of recycled aggregate[J].Industrial Construction,2012,42(4):1-4.
[34]徐蔚.再生粗骨料取代率对混凝土基本性能的影响[J].混凝土,2006(9):45-47.XU Wei.Experimental study on influence of recycled coarse aggregates contents on properties of recycled aggregate concrete[J].Concrete,2006(9):45-47.
[35]刘丰,白国良,柴园园,等.再生骨料混凝土抗压强度和抗剪强度试验研究[J].工业建筑,2010,40(12):70-74.LIU Feng,BAI Guoliang,CHAI Yuanyuan,et al.Experimental research on recycled aggregate concrete tensile and shear strength[J].Industrial Construction,2010,40(12):70-74.
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