钢管活性粉末混凝土界面粘结强度试验研究
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摘要
参照传统钢管混凝土粘结强度的设计理论与试验方法,设计2组钢管活性粉末混凝土(ReactivePowder Concrete,RPC)柱试件,进行钢管与RPC之间界面粘结强度试验研究。考虑施工条件以及工程造价等因素,对RPC配合比和试件养护条件进行了优化。通过试件的反复推出试验,得到钢管RPC柱的荷载-滑移曲线。试验研究结果表明,钢管RPC试件的第1次轴心推出试验曲线与普通钢管混凝土试件的轴心推出试验曲线有相似的规律,而其反复轴心推出试验曲线与普通钢管混凝土试件的反复轴心推出试验曲线的规律有差异,而且钢管RPC试件的奇数次轴心推出试验曲线与偶数次轴心推回试验曲线没有对称性;采用蔡绍怀提出的粘结强度计算公式计算得到的钢管RPC粘结强度与试验得到的结果相近;自然养护条件下RPC的立方体强度约为蒸汽养护条件下的88%,自然养护条件下钢管RPC的粘结强度低于蒸汽养护条件下钢管RPC的粘结强度。
Two sets of Reactive Powder Concrete(RPC) filled steel tubes were designed according to the conventional bond strength design theory,and the experimental method of concrete filled steel tube and the bond strength between the steel tube and RPC was tested.The mix proportion and the curing system are optimized considering the factors of construction condition and the engineering cost,etc.The load-slip curves for RPC filled steel tubes were investigated through repeated push-out tests.Test results show that the character of the first time push-out curves is similar to those from the conventional concrete filled steel tubes.However,the repeated push-out curves have some difference with those from the conventional concrete filled steel tubes.There is no symmetrical relationship of repeated push-out curves between the odd times and the even times for RPC filled steel tubes.Most of the tested bond strength results agree with the results calculated from the formula suggested by CAI Shaohuai.The cube strength of RPC with natural curing is 88% of that with steam curing.The bond strength of RPC filled steel tube with natural curing is lower than that with steam curing.
Two sets of Reactive Powder Concrete(RPC) filled steel tubes were designed according to the conventional bond strength design theory,and the experimental method of concrete filled steel tube and the bond strength between the steel tube and RPC was tested.The mix proportion and the curing system are optimized considering the factors of construction condition and the engineering cost,etc.The load-slip curves for RPC filled steel tubes were investigated through repeated push-out tests.Test results show that the character of the first time push-out curves is similar to those from the conventional concrete filled steel tubes.However,the repeated push-out curves have some difference with those from the conventional concrete filled steel tubes.There is no symmetrical relationship of repeated push-out curves between the odd times and the even times for RPC filled steel tubes.Most of the tested bond strength results agree with the results calculated from the formula suggested by CAI Shaohuai.The cube strength of RPC with natural curing is 88% of that with steam curing.The bond strength of RPC filled steel tube with natural curing is lower than that with steam curing.
引文
[1]蔡绍怀.现代钢管混凝土结构(修订版)[M].北京:人民交通出版社,2007.
[2]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2007.
[3]钟善桐.钢管混凝土结构[M].北京:清华大学出版社,2003.
[4]RICHARD P,CHEYREZY M.Composition of Reactive Powder Concrete[J].Cement and Concrete Research,1995,25(7):1501-1511.
[5]季文玉,周超民.预应力RPC箱梁剪力滞效应分析[J].中国铁道科学,2007,28(1):19-22.(JI Wenyu,ZHOU Chaomin.Shear Lag Analysis of Prestressed RPC Box Girder[J].China Railway Science,2007,28(1):19-22.in Chinese)
[6]吴炎海,林震宇.钢管活性粉末混凝土轴压短柱受力性能试验研究[J].中国公路学报,2005,18(1):57-62.(WU Yanhai,LIN Zhenyu.Experimental Study of Behavior on RPC Filled Steel Tubular Stub Columns under AxialCompression[J].China Journal of Highway and Transport,2005,18(1):57-62.in Chinese)
[7]林震宇,吴炎海,沈祖炎.圆钢管活性粉末混凝土轴压力学性能研究[J].建筑结构学报,2005,26(4):52-57.(LIN Zhenyu,WU Yanhai,SHEN Zuyan.Research on Behavior of RPC Filled Circular Steel Tube Column Subjectedto Axial Compression[J].Journal of Building Structures,2005,26(4):52-57.in Chinese)
[8]杨吴生.钢管活性粉末混凝土力学性能及其极限承载力研究[D].长沙:湖南大学,2003.
[9]田志敏,张想柏,冯建文,等.钢管超高性能RPC短柱的轴压特性研究[J].地震工程与工程振动,2008,28(1):99-107.(TIAN Zhimin,ZHANG Xiangbai,FENG Jianwen,et al.Characteristics of RPC-Filled Steel Tubular Puncheonswith Ultra High Performance Subjected to Axial Compressive Loading[J].Journal of Earthquake Engineering andEngineering Vibration,2008,28(1):99-107.in Chinese)
[10]孟世强,陈广智,覃维祖.钢管活性粉末混凝土初步研究[J].混凝土与水泥制品,2003(1):5-8.(MENG Shiqiang,CHEN Guangzhi,QIN Weizu.Primary Research of Reactive Powder Concrete-Filled Steel Tube[J].China Concrete and Cement Products,2003(1):5-8.in Chinese)
[11]薛立红,蔡绍怀.钢管混凝土柱组合界面的粘结强度(上)[J].建筑科学,1996(3):22-28.(XUE Lihong,CAI Shaohuai.Bond Strength at the Interface of Concrete-Filled Steel Tube Columns[J].BuildingScience,1996(3):22-28.in Chinese)
[12]池建军.钢管混凝土界面抗剪粘结性能的试验研究与有限元分析[D].长沙:长沙理工大学,2004.
[2]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2007.
[3]钟善桐.钢管混凝土结构[M].北京:清华大学出版社,2003.
[4]RICHARD P,CHEYREZY M.Composition of Reactive Powder Concrete[J].Cement and Concrete Research,1995,25(7):1501-1511.
[5]季文玉,周超民.预应力RPC箱梁剪力滞效应分析[J].中国铁道科学,2007,28(1):19-22.(JI Wenyu,ZHOU Chaomin.Shear Lag Analysis of Prestressed RPC Box Girder[J].China Railway Science,2007,28(1):19-22.in Chinese)
[6]吴炎海,林震宇.钢管活性粉末混凝土轴压短柱受力性能试验研究[J].中国公路学报,2005,18(1):57-62.(WU Yanhai,LIN Zhenyu.Experimental Study of Behavior on RPC Filled Steel Tubular Stub Columns under AxialCompression[J].China Journal of Highway and Transport,2005,18(1):57-62.in Chinese)
[7]林震宇,吴炎海,沈祖炎.圆钢管活性粉末混凝土轴压力学性能研究[J].建筑结构学报,2005,26(4):52-57.(LIN Zhenyu,WU Yanhai,SHEN Zuyan.Research on Behavior of RPC Filled Circular Steel Tube Column Subjectedto Axial Compression[J].Journal of Building Structures,2005,26(4):52-57.in Chinese)
[8]杨吴生.钢管活性粉末混凝土力学性能及其极限承载力研究[D].长沙:湖南大学,2003.
[9]田志敏,张想柏,冯建文,等.钢管超高性能RPC短柱的轴压特性研究[J].地震工程与工程振动,2008,28(1):99-107.(TIAN Zhimin,ZHANG Xiangbai,FENG Jianwen,et al.Characteristics of RPC-Filled Steel Tubular Puncheonswith Ultra High Performance Subjected to Axial Compressive Loading[J].Journal of Earthquake Engineering andEngineering Vibration,2008,28(1):99-107.in Chinese)
[10]孟世强,陈广智,覃维祖.钢管活性粉末混凝土初步研究[J].混凝土与水泥制品,2003(1):5-8.(MENG Shiqiang,CHEN Guangzhi,QIN Weizu.Primary Research of Reactive Powder Concrete-Filled Steel Tube[J].China Concrete and Cement Products,2003(1):5-8.in Chinese)
[11]薛立红,蔡绍怀.钢管混凝土柱组合界面的粘结强度(上)[J].建筑科学,1996(3):22-28.(XUE Lihong,CAI Shaohuai.Bond Strength at the Interface of Concrete-Filled Steel Tube Columns[J].BuildingScience,1996(3):22-28.in Chinese)
[12]池建军.钢管混凝土界面抗剪粘结性能的试验研究与有限元分析[D].长沙:长沙理工大学,2004.
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