圆端形钢管内约束混凝土轴压短柱的力学性能
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摘要
为改善圆端形钢管混凝土(CFRT)柱的力学性能,采取在钢管内部焊接拉筋的方式来提高对核心混凝土的约束效果,并采用ABAQUS对4种不同约束方式的圆端形钢管内约束混凝土(SCFRT)轴压短柱进行三维实体有限元分析,发现双向均匀对拉箍筋为最佳约束方式.最后,对2根圆端形钢管混凝土轴压短柱及2根双向均匀对拉约束方式的圆端形拉筋约束混凝土轴压短柱进行了试验研究,结果显示试验结果与数值模拟结果吻合较好,验证了双向均匀对拉约束方式的合理性.
In order to improve the mechanical properties of confinement concrete-filled round-ended steel tubular( CFRT) stub columns,this paper adopts the way of welding stirrups to enhance the constraint effect on core concrete. Then,the ABAQUS software is employed to analyze the finite element parameters of the 3D solid of stirrups confinement concrete-filled round-ended steel tubular( SCFRT) stub columns in four constraint ways,and the way of bidirectional butt joint stirrups is found to be the best. Finally,two sets of CFRT stub columns and two sets of SCFRT stub columns are investigated by experiments. It is found that the experimental results accord well with the simulation ones,which demonstrates that the way of bidirectional butt joint stirrups is rational.
In order to improve the mechanical properties of confinement concrete-filled round-ended steel tubular( CFRT) stub columns,this paper adopts the way of welding stirrups to enhance the constraint effect on core concrete. Then,the ABAQUS software is employed to analyze the finite element parameters of the 3D solid of stirrups confinement concrete-filled round-ended steel tubular( SCFRT) stub columns in four constraint ways,and the way of bidirectional butt joint stirrups is found to be the best. Finally,two sets of CFRT stub columns and two sets of SCFRT stub columns are investigated by experiments. It is found that the experimental results accord well with the simulation ones,which demonstrates that the way of bidirectional butt joint stirrups is rational.
引文
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[11]易贤仁,李彬,卢哲安,等.圆端形钢管微膨胀混凝土塔柱非线性接触分析[J].混凝土,2010,243(1):33-36.Yi Xian-ren,Li Bin,Lu Zhe-an,et al.Nonlinear contact analysis on round-end micro-expansive concrete filled steel tubes tower-column[J].Concrete,2010,243(1):33-36.
[12]谷利雄,丁发兴,付磊,等.圆端形钢管混凝土轴压短柱受力性能研究[J].中国公路学报,2014,27(1):123-129.Gu Li-xiong,Ding Fa-xing,Fu Lei,et al.Mechanical behavior of concrete-filled round-end steel tubular stub columns under axial load[J].China Journal of Highway and Transport,2014,27(1):123-129.
[13]Hibbitt,Karlson,Sorenson.ABAQUS version 6.4:theory manual,users’manual,verification manual and example problems manual[M].Hibbitt:Sorenson Inc,2003.
[14]Ding Fa-xing,Ying Xiao-yong,Zhou Lin-chao,et al.Unified calculation method and its application in determining the uniaxial mechanical properties of concrete[J].Frontiers of Architecture and Civil Engineering in China,2011,5(3):381-393.
[15]丁发兴,李刚,龚永智,等.钢骨-圆钢管混凝土轴压短柱力学性能分析[J].中南大学学报:自然科学版,2012,34(9):3625-3630.Ding Fa-xing,Li Gang,Gong Yong-zhi,et al.Behavior of tubular stub columns of axially loaded steel-reinforced concrete-filled circular steel[J].Journal of Central South Unversity:Science and Technology,2012,34(9):3625-3630.
[2]蒋丽忠,邵光强,姜静静,等.高速铁路圆端形实体桥墩抗震性能试验研究[J].土木工程学报,2013,46(3):86-95.Jiang Li-zhong,Shao Guang-qiang,Jiang Jing-jing,et al.Experimental study on seismic performance of solid piers with round ended cross-section in high-speed railway[J].China Civil Engineering Journal,2013,46(3):86-95.
[3]鞠彦忠,阎贵平,刘林.低配筋大比例尺圆端型桥墩抗震性能的试验研究[J].土木工程学报,2003,36(11):65-69.Ju Yan-zhong,Yan Gui-ping,Liu Lin.Experimental study on seismic behaviors of large-scale RC round-ended piers with low reinforcement ratio[J].China Civil Engineering Journal,2003,36(11):65-69.
[4]司炳君,李宏男,王东升,等.基于位移设计的钢筋混泥土桥墩抗震性能试验研究(I):拟静力试验[J].地震工程与工程震动,2008,28(1):123-129.Si Bing-jun,Li Hong-nan,Wang Dong-sheng,et al.Experimental evaluation of seismic performance of reinforced concrete bridge piers designed on the basis of displacement(I):quasi-static test[J].Journal of Earthquake Engineer and Engineer Vibration,2008,28(1):123-129.
[5]刘鸣,陆本燕,刘伯权.钢筋混凝土桥墩破坏模式识别方法[J].中国公路学报,2011,24(3):58-63.Liu Ming,Lu Ben-yan,Liu Bo-quan.Failure mode identification method of reinforced concrete bridge pier[J].China Journal of Highway and Transport,2011,24(3):58-63.
[6]尚维波,张春宁.高墩刚构桥系梁抗震分析[J].长安大学学报:自然科学版,2012,32(1):62-65.Shang Wei-bo,Zhang Chun-ning.Seismic analysis of tie beam of rigid frame bridge with high pier[J].Journal of Changan University:Natural Science Edition,2012,32(1):62-65.
[7]梁启智,汤海波.普通钢筋混凝土连续梁抗震性能的有限元分析[J].华南理工大学学报:自然科学版,1995,23(1):1-11.Liang Qi-zhi,Tang Hai-bo.Analysis of anti-seismic behavior of the reinforced concrete lintel beam by finite element method[J].Journal of South China University of Technology:Natural Science,1995,23(1):1-11.
[8]李彬,李新,周丹,等.圆端形钢管混凝土双肢塔柱受力性能试验研究[J].建材世界,2009,30(3):31-33.Li Bin,Li Xin,Zhou Dan,et al.Analysis of mechanical properties of round-end concrete filled steel tubes coupled column[J].The World of Building Materials,2009,30(3):31-33.
[9]蔡崇华,谢建雄,卢哲安,等.微膨胀圆端形钢管混凝土力学性能研究[J].建材世界,2009,30(2):31-33.Cai Chong-hua,Xie Jian-xiong,Lu Zhe-an,et al.Study on the mechanical properties of micro-expansive circle-end concrete filled steel[J].The World of Building Materials,2009,30(2):31-33.
[10]谢建雄,蔡崇华,卢哲安,等.微膨胀圆端形钢管混凝土双肢柱试验研究与数值模拟[J].武汉大学学报:工学版,2010,43(4):485-489.Xie Jian-xiong,Cai Chong-hua,Lu Zhe-an,et al.Test study and numerical simulation of micro-expansive round-end concrete filled steel tubes coupled column[J].Engineering Journal of Wuhan University:2010,43(4):485-489.
[11]易贤仁,李彬,卢哲安,等.圆端形钢管微膨胀混凝土塔柱非线性接触分析[J].混凝土,2010,243(1):33-36.Yi Xian-ren,Li Bin,Lu Zhe-an,et al.Nonlinear contact analysis on round-end micro-expansive concrete filled steel tubes tower-column[J].Concrete,2010,243(1):33-36.
[12]谷利雄,丁发兴,付磊,等.圆端形钢管混凝土轴压短柱受力性能研究[J].中国公路学报,2014,27(1):123-129.Gu Li-xiong,Ding Fa-xing,Fu Lei,et al.Mechanical behavior of concrete-filled round-end steel tubular stub columns under axial load[J].China Journal of Highway and Transport,2014,27(1):123-129.
[13]Hibbitt,Karlson,Sorenson.ABAQUS version 6.4:theory manual,users’manual,verification manual and example problems manual[M].Hibbitt:Sorenson Inc,2003.
[14]Ding Fa-xing,Ying Xiao-yong,Zhou Lin-chao,et al.Unified calculation method and its application in determining the uniaxial mechanical properties of concrete[J].Frontiers of Architecture and Civil Engineering in China,2011,5(3):381-393.
[15]丁发兴,李刚,龚永智,等.钢骨-圆钢管混凝土轴压短柱力学性能分析[J].中南大学学报:自然科学版,2012,34(9):3625-3630.Ding Fa-xing,Li Gang,Gong Yong-zhi,et al.Behavior of tubular stub columns of axially loaded steel-reinforced concrete-filled circular steel[J].Journal of Central South Unversity:Science and Technology,2012,34(9):3625-3630.
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