压弯剪扭作用下异形柱的抗扭性能研究
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摘要
为研究复合受力下异形柱的抗扭性能,进行了一根L形柱、四根T形柱和一根十字形柱在压弯剪扭复合受力下抗扭性能的试验研究,分析了轴压比、扭剪比、截面形状对异形柱抗扭性能的影响情况。利用有限元软件建立了复合受力下异形柱抗扭性能的数值分析模型,建议了相应的模型分析参数。研究结果表明:在试验参数范围内,轴压比和扭剪比会提高T形柱的抗扭性能。轴压比为0.314的T形柱的极限扭矩和极限扭转角比轴压比为0.114的提高了203.8%和41.7%。扭剪比为1.34的T形柱的极限扭矩和极限扭转角比扭剪比为0.57的提高了62.9%和112.5%。截面形状对压弯剪扭复合受力下异形柱的开裂扭矩、极限扭矩的影响规律较复杂。建立的有限元模型能够较准确的模拟压弯剪扭作用下异形柱的开裂扭矩和极限扭矩。
One L-shaped column, four T-shaped columns and one +-shaped column were tested under the combined actions of compression, bending, shear and torsion to investigate their torsion performances. The influence of axial load ratio, torsion-shear ratio and sectional shape on the torsion behavior of specially shaped columns was analyzed. The numerical model for the torsion performances of specially shaped columns under the combined actions was established by finite element software, and the corresponding model parameters were suggested. The results show that within the scope of test parameters, the torsion performances of T-shaped columns are increased with axial load ratios and with torsion-shear ratios. With the increase of axial load ratios from 0.114 to 0.314, the ultimate torque and the ultimate torsion angle of T-shaped column are increased by203.8% and 41.7%. With the increase of torsion-shear ratios from 0.57 to 1.34, the ultimate torque and the ultimate torsion angle of T-shaped column are increased by 62.9% and 112.5%. The effect of sectional shape on the cracking torque and the ultimate torque of specially shaped columns is complicated. The cracking torque and the ultimate torque are well predicted by the proposed finite element model.
One L-shaped column, four T-shaped columns and one +-shaped column were tested under the combined actions of compression, bending, shear and torsion to investigate their torsion performances. The influence of axial load ratio, torsion-shear ratio and sectional shape on the torsion behavior of specially shaped columns was analyzed. The numerical model for the torsion performances of specially shaped columns under the combined actions was established by finite element software, and the corresponding model parameters were suggested. The results show that within the scope of test parameters, the torsion performances of T-shaped columns are increased with axial load ratios and with torsion-shear ratios. With the increase of axial load ratios from 0.114 to 0.314, the ultimate torque and the ultimate torsion angle of T-shaped column are increased by203.8% and 41.7%. With the increase of torsion-shear ratios from 0.57 to 1.34, the ultimate torque and the ultimate torsion angle of T-shaped column are increased by 62.9% and 112.5%. The effect of sectional shape on the cracking torque and the ultimate torque of specially shaped columns is complicated. The cracking torque and the ultimate torque are well predicted by the proposed finite element model.
引文
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[11]程文瀼,康谷贻,颜德姮,等.混凝土结构设计原理[M].北京:中国建筑工业出版社,2002:196―197.Cheng Wenrang,Kang Guyi,Yan Deheng,et al.Design principles for concrete structures[M].Beijing:China Architecture and Building Press,2002:196―197.(in Chinese)
[12]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005:47―48.Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005:47―48.(in Chinese)
[2]赵嘉康,张连德,卫云亭.钢筋混凝土压弯剪扭构件的抗扭强度研究[J].土木工程学报,1993,26(1):20―30.Zhao Jiakang,Zhang Liande,Wei Yunting.Torsional strength of RC members subjected to compression,bending,shear and torsion[J].China Civil Engineering Journal,1993,26(1):20―30.(in Chinese)
[3]王东方,秦卫红.钢筋混凝土压弯剪扭构件的扭转刚度[J].同济大学学报,2004,32(2):167―171.Wang Dongfang,Qin Weihong.Torsion stiffness of reinforced concrete compression-flexure-shear-torsion components[J].Journal of Tongji University,2004,32(2):167―171.(in Chinese)
[4]林咏梅,周小真,张连德.钢筋混凝土双向压弯剪构件在单调扭矩作用下抗扭性能的研究[J].建筑结构学报,1996,17(1):29―39.Lin Yongmei,Zhou Xiaozhen,Zhang Liande.Study on torsional behavior of RC members subjected to biaxial eccentric compression,biaxial shear and monotonic torsion[J].Journal of Building Structures,1996,17(1):29―39.(in Chinese)
[5]刘继明,孙黄胜,张连德.钢筋混凝土双向偏压剪构件在反复扭矩作用下受扭性能试验研究[J].建筑结构学报,2001,22(3):48―53.Liu Jiming,Sun Huangsheng,Zhang Liande.Experimental study on torsional behavior of R.C.members subjected to biaxial eccentric compression,shear,and reversed cyclic torsion[J].Journal of Building Structures,2001,22(3):48―53.(in Chinese)
[6]门进杰,史庆轩,刘继明,李家富.高强钢筋混凝土复合受扭构件开裂性能试验研究[J].西安建筑科技大学学报(自然科学版),2007,39(2):193―198.Men Jinjie,Shi Qingxuan,Liu Jiming,Li Jiafu.Strain of steel reinforcement and ultimate torque on torsional behaviors of high-strength reinforced concrete members subjected to combined torsion[J].Journal of Xi’an University of Architecture&Technology(Natural Science Edition),2007,39(2):193―198.(in Chinese)
[7]Navarro Gregori J,Miguel Sosa P,Fernández Prada M A,Filippou F C.A 3D numerical model for reinforced and prestressed concrete elements subjected to combined axial,bending,shear and torsion loading[J].Engineering Structures,2007,29(2):3404―3419.
[8]陆新征,江见鲸.利用斜支撑提高异型柱框架结构抗扭性能的研究[J].工业建筑,2002,32(6):39―41,67.Lu Xinzheng,Jiang Jianjing.Studies on improving the torsion resistance ability of special shape column frames using inclined supports[J].Industrial Construction,2002,32(6):39―41,67.(in Chinese)
[9]徐玉野,邱政和,何叶,柴振岭.压扭作用下混凝土异形柱的抗扭性能[J].2012,43(10):中南大学学报(自然科学版),2012,43(10):4029―4037.Xu Yuye,Qiu Zhenghe,He Ye,Chai Zhenling.Torsion behavior of reinforced concrete special-shaped columns under pressure and torque[J].Journal of Central South University(Science and Technology),2012,43(10):4029―4037.(in Chinese)
[10]何叶,徐玉野,林燕卿,罗漪.钢筋混凝土异形柱抗扭性能的数值模拟[J].华侨大学学报(自然科学版),2012,33(4):429―434.He Ye,Xu Yuye,Lin Yanqing,Luo Yi.Numerical simulation of the torsional behavior for reinforced concrete specially-shaped columns[J].Journal of Huaqiao University(Natural Science),2012,33(4):429―434.(in Chinese)
[11]程文瀼,康谷贻,颜德姮,等.混凝土结构设计原理[M].北京:中国建筑工业出版社,2002:196―197.Cheng Wenrang,Kang Guyi,Yan Deheng,et al.Design principles for concrete structures[M].Beijing:China Architecture and Building Press,2002:196―197.(in Chinese)
[12]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005:47―48.Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005:47―48.(in Chinese)