L形柱结构附加扭转试验及剪扭承载力分析
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摘要
在试验的基础上,考察了在低周反复荷载作用下L形柱所产生的扭转效应,并借鉴规范对复合受力构件剪扭承载力的计算方法,定量地分析了附加扭矩对L形柱所产生的影响。研究结果表明:单个L形柱和结构中的L形框架柱受扭性能不同,前者对水平荷载的加载角度表现敏感,非对称加载时,附加扭矩的影响不可忽略,设计中应考虑弯剪扭的复合作用;而后者作为结构中协同工作的一部分,抗扭性能明显改善。
The torsion effect of L-shaped column under low cyclic loading was discussed based on the experiment.The bearing capacity calculation method of shear and torsion of component under combined forces was gained by referring to standard,at the same time,the influence of additional torque to L-shaped column was quantitatively analyzed.The result shows that the torsion performance in single L-shaped column is different with that in column frame;the former is sensitive to loading angle of horizontal load,and its additional torque influence can not be ignored under asymmetric loading,meanwhile,the composite action of bending,shear and torsion in design should be considered in terms of the re-torsion capacity of latter,as a part of the structure that works together is advanced obviously.
The torsion effect of L-shaped column under low cyclic loading was discussed based on the experiment.The bearing capacity calculation method of shear and torsion of component under combined forces was gained by referring to standard,at the same time,the influence of additional torque to L-shaped column was quantitatively analyzed.The result shows that the torsion performance in single L-shaped column is different with that in column frame;the former is sensitive to loading angle of horizontal load,and its additional torque influence can not be ignored under asymmetric loading,meanwhile,the composite action of bending,shear and torsion in design should be considered in terms of the re-torsion capacity of latter,as a part of the structure that works together is advanced obviously.
引文
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[2]吴敏哲,郭棣.钢筋混凝土L形截面柱受力性能分析[J].世界地震工程,2002,18(1):66-72.WU Min-zhe,GUO Di.Behavior Anylysis of Rein-forced Concrete L Shaped Column[J].World Earth-quake Engineering,2002,18(1):66-72.
[3]冯建平.混凝土L形截面柱抗剪承载力的试验研究[J].华南理工大学学报:自然科学版,1995,23(1):68-75.FENG Jian-ping.The Experiment Study of ShearStrength of L-shaped Columns[J].Journal of SouthChina University of Technology:Natural Science Edi-tion,1995,23(1):68-75.
[4]康谷贻,巩长江.单调及低周反复荷载作用下异形截面框架柱的受剪性能[J].建筑结构学报,1997,18(5):22-31.KANG Gu-yi,GONG Chang-jiang.Shear Propertiesof Special Shaped Section Frame Columns UnderMonotonic and Horizontal Low Cyclic Loadings[J].Journal of Building Structures,1997,18(5):22-31.
[5]孙黄胜.钢筋混凝土复合受扭构件的开裂扭矩计算[J].青岛建筑工程学院学报,2001,22(3):5-8.SUN Huang-sheng.The Calculation of CrackingTorque of Reinforced Concrete Members Subjected toCombined Torsion[J].Journal of Qingdao Institute ofArchitecture and Engineering,2001,22(3):5-8.
[6]陆新征,江见鲸.利用斜支撑提高异形柱框架结构抗扭性能的研究[J].工业建筑,2002,32(6):39-41.LU Xin-zheng,JIANG Jian-jing.Studies on Improvingthe Torsion Resistance Ability of Special Shape Col-umn Frames Using Inclined Supports[J].IndustrialConstruction,2002,32(6):39-41.
[7]郭军庆,王雪韵,雷自学,等.加芯混凝土框架柱轴压比限值试验研究[J].建筑科学与工程学报,2005,22(4):45-49.GUO Jun-qing,WANG Xue-yun,LEI Zi-xue,et al.Experimental Research on Limit Value of Axial Com-pression Ratio for Concrete Frame Columns with Cen-tral Reinforcement[J].Journal of Architecture andCivil Engineering,2005,22(4):45-49.
[8]曹宝珠,周绪红,刘永健.钢管混凝土桁架新型节点试验研究[J].建筑科学与工程学报,2006,23(1):45-48.CAO Bao-zhu,ZHOU Xu-hong,LIU Yong-jian.Ex-perimental Research on New Joints of Concrete-filledSteel Tube Truss[J].Journal of Architecture and Civ-il Engineering,2006,23(1):45-48.
[9]单炜,李玉顺,于玲,等.异形截面斜拉桥索塔锚固区节段足尺模型试验研究[J].中国公路学报,2005,18(3):60-65.SHAN Wei,LI Yu-shun,YU Ling,et al.Experimen-tal Research on Full-scale Model for Anchorage Zoneof Pylon of Cable-stayed Bridge with Illegal-shapedSection[J].China Journal of Highway and Transport,2005,18(3):60-65.
[10]楼铁炯,郭乙木,王振林,等.任意截面无粘结预应力混凝土梁的极限非线性分析[J].中国公路学报,2005,18(1):77-80.LOU Tie-jiong,GUO Yi-mu,WANG Zhen-lin,et al.Nonlinear Analysis of Unbonded Prestressed Beamswith Arbitrary Section at Ultimate[J].China Journalof Highway and Transport,2005,18(1):77-80.
[11]王元清,张勇,石永久,等.吊索与钢管混凝土拱桥新型节点承载性能分析[J].建筑科学与工程学报,2005,22(3):55-58.WANG Yuan-qing,ZHANG Yong,SHI Yong-jiu,et al.Analysis of Load Capacity of New-style JointsBetween Cable and Concrete-filled Steel Tube ArchBridge[J].Journal of Architecture and Civil Engineer-ing,2005,22(3):55-58.
[12]沈蒲生,孟焕陵.框筒结构梁柱截面基于剪力滞最小的合理高度[J].建筑科学与工程学报,2005,22(3):16-19.SHEN Pu-sheng,MENG Huan-ling.Reasonable Sec-tion Height of Beam and Column Based on the Mini-mum Shear Lag in Framed Tube Structures[J].Jour-nal of Architecture and Civil Engineering,2005,22(3):16-19.
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