圆钢管RPC短柱轴心受压极限承载力分析
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摘要
为了研究钢管活性粉末混凝土(钢管RPC)柱轴心受压力学特性,采用全截面受压方法进行了圆钢管RPC短柱轴心受压试验,测试了其在荷载作用下的变形、应变情况.试验结果表明,在荷载达到极限承载力时,钢管PRC短柱的变形主要处于弹性阶段,当承载力下降到极限承载力的80%～90%后趋于平缓,在总结相关试验资料的基础上,参照CECS 104:99中钢管高强混凝土极限承载力公式,提出了钢管RPC短柱的极限承载力计算经验公式.为了便于工程应用,把公式中的混凝土强度及其对应的系数α进行了扩展,采用扩展后的系数α对试验数据重新进行了计算,计算结果与试验数据符合良好,能满足工程应用.
In order to study the axial compressive mechanical performance of reactive powder concrete(RPC) filled steel tube,an experiment on circular RPC filled steel tube stub columns is conducted to test the deformation and the strain under the axial full section load.The test results show that the main deformation is in elastic stage when the load is up to its ultimate loading capacity and then the load declines to be 80%-90% of the ultimate load.The empirical formula of ultimate loading capacity for the RPC filled steel tube stub columns is suggested according to the formula of CECS 104: 99 with the referenced tested data.The strength of the concrete and the coefficient α used for CECS 104: 99 formula are extended in order to apply the empirical formula to the engineering design.The tested data is recalculated with the revised α.The calculated results are in good agreement with the tested data.It satisfies with the engineering requirements.
In order to study the axial compressive mechanical performance of reactive powder concrete(RPC) filled steel tube,an experiment on circular RPC filled steel tube stub columns is conducted to test the deformation and the strain under the axial full section load.The test results show that the main deformation is in elastic stage when the load is up to its ultimate loading capacity and then the load declines to be 80%-90% of the ultimate load.The empirical formula of ultimate loading capacity for the RPC filled steel tube stub columns is suggested according to the formula of CECS 104: 99 with the referenced tested data.The strength of the concrete and the coefficient α used for CECS 104: 99 formula are extended in order to apply the empirical formula to the engineering design.The tested data is recalculated with the revised α.The calculated results are in good agreement with the tested data.It satisfies with the engineering requirements.
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,2007:6-7.
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[4]RICHARD P,CHEYREZY M.Composition of reactive powder concrete[J].Cement and Concrete Research,1995,25(7):1501-1511.
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[8]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 Zhi-min,ZHANG Xiang-bai,FENG Jian-wen,et al.Characteristics of RPC-filled steel tubular puncheons with ultrahigh performance subjected to axial compressive loading[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):99-107.(in Chinese)
[9]哈尔滨建筑工程学院,中国建筑科学研究院.CECS 104:99高强混凝土结构技术规程[S].北京:中国工程建设标准化协会,1999.
[10]林震宇,张静,吴炎海,等.钢管RPC短柱轴心受压试验研究[J].福建建筑,2003(3):28-30.LIN Zhen-yu,ZHANG Jing,WU Yan-hai,et al.Experimental investigation on behavior of RPC filled steel stub-column[J].Fujian Architecture&Construction,2003(3):28-30.(in Chinese)
[2]钟善桐.钢管混凝土结构[M].北京:清华大学出版社,2003:20-22.
[3]陈宗弼,陈星,叶群英,等.广州新中国大厦结构设计[J].建筑结构学报,2000,21(3):2-9.CHEN Zong-bi,CHEN Xing.YE Qun-ying,et al.Structural design of Guangzhou new China mansion[J].Journal ofBuilding Structures,2000,21(3):2-9.(in Chinese)
[4]RICHARD P,CHEYREZY M.Composition of reactive powder concrete[J].Cement and Concrete Research,1995,25(7):1501-1511.
[5]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 Yan-hai,LIN Zhen-yu.Experimental study of behavior on RPC filled steel tubular stub columns under axial compression[J].China Journal of Highway and Transport,2005,18(1):57-62.(in Chinese)
[6]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 Zhen-yu,WU Yan-hai,SHEN Zu-yan.Research on behavior of RPC filled circular steel tube column subjected to axialcompression[J].Journal of Building Structures,2005,26(4):52-57.(in Chinese)
[7]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:湖南大学土木工程学院,2003.YANG Wu-sheng.Mechanical properties and the capacity of RPC-filled steel tube[D].Changsha:Hunan University,2003.(in Chinese)
[8]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 Zhi-min,ZHANG Xiang-bai,FENG Jian-wen,et al.Characteristics of RPC-filled steel tubular puncheons with ultrahigh performance subjected to axial compressive loading[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):99-107.(in Chinese)
[9]哈尔滨建筑工程学院,中国建筑科学研究院.CECS 104:99高强混凝土结构技术规程[S].北京:中国工程建设标准化协会,1999.
[10]林震宇,张静,吴炎海,等.钢管RPC短柱轴心受压试验研究[J].福建建筑,2003(3):28-30.LIN Zhen-yu,ZHANG Jing,WU Yan-hai,et al.Experimental investigation on behavior of RPC filled steel stub-column[J].Fujian Architecture&Construction,2003(3):28-30.(in Chinese)
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