T形配钢型钢混凝土柱-钢梁框架抗震性能研究
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摘要
为研究T形配钢型钢混凝土柱-钢梁框架的抗震性能,进行了1榀3层2跨、缩尺比例为1∶3的框架试件拟静力试验,了解其破坏形态、滞回曲线和骨架曲线,分析了试件的延性、耗能能力、刚度和强度退化规律。基于纤维模型对框架试件进行了数值模拟,研究了结构抗震性能在不同轴压比、配钢率和混凝土强度下的变化规律。结果表明:在水平低周往复荷载作用下,试件出现"梁铰"破坏,具有良好的延性和耗能能力,满足"强柱弱梁,强剪弱弯,强节点弱构件"的抗震设计要求。轴压比对试件屈服后的性能影响较大,结构的承载力和延性随轴压比增大而有所降低,设计时需合理控制轴压比;配钢率主要影响初始刚度和极限承载力,结构的抗震性能随配钢率增大得到有效改善;结构的极限承载力随着混凝土强度增大而提高,但结构的延性会略有降低,设计时需合理考虑。研究成果可为该类结构的设计提供可靠的支撑。
To study the seismic behavior of frames with T-shaped steel reinforced concrete columns and steel beams, a pseudo-static test of a 1/3 scaled, 3-story 2-bay specimen was carried out. The main results such as the failure pattern, hysteretic and skeleton curves were obtained. The ductility, energy dissipation capacity and degradation of stiffness and strength of the specimen were analyzed. Numerical simulations were conducted with the fiber model to study the effects of different design parameters such as the axial compression ratio, steel ratio and concrete strength on the seismic performance of the frame. It was demonstrated that the specimen exhibited a beam-hinge failure mode under the condition of horizontal cyclic loading. The specimen had good ductility and energy dissipation capacity and it met the seismic design requirements of strong column-weak beam, strong shear-weak bending and strong joint-weak pole. The axial compression ratio has great influence on the performance of the specimen after yielding. With the increase of the axial compression ratio, the strength and ductility of the structure will decrease. It is necessary to control the axial compression ratio in a reasonable range in the design. The steel ratio mainly affects the initial stiffness and ultimate strength, while its increase can effectively improve the seismic performance of the frame. The increase of concrete strength can increase the ultimate strength of the structure, but reduce the ductility slightly. It is of great significance to consider concrete strength comprehensively in the design. The research results can provide reliable support for the design of this kind of structures.
To study the seismic behavior of frames with T-shaped steel reinforced concrete columns and steel beams, a pseudo-static test of a 1/3 scaled, 3-story 2-bay specimen was carried out. The main results such as the failure pattern, hysteretic and skeleton curves were obtained. The ductility, energy dissipation capacity and degradation of stiffness and strength of the specimen were analyzed. Numerical simulations were conducted with the fiber model to study the effects of different design parameters such as the axial compression ratio, steel ratio and concrete strength on the seismic performance of the frame. It was demonstrated that the specimen exhibited a beam-hinge failure mode under the condition of horizontal cyclic loading. The specimen had good ductility and energy dissipation capacity and it met the seismic design requirements of strong column-weak beam, strong shear-weak bending and strong joint-weak pole. The axial compression ratio has great influence on the performance of the specimen after yielding. With the increase of the axial compression ratio, the strength and ductility of the structure will decrease. It is necessary to control the axial compression ratio in a reasonable range in the design. The steel ratio mainly affects the initial stiffness and ultimate strength, while its increase can effectively improve the seismic performance of the frame. The increase of concrete strength can increase the ultimate strength of the structure, but reduce the ductility slightly. It is of great significance to consider concrete strength comprehensively in the design. The research results can provide reliable support for the design of this kind of structures.
引文
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[11]布欣,谷倩,王新武.剖分T型钢梁柱连接框架中柱空间节点抗震试验研究[J].工程力学,2017,34(8):105-116.Bu Xin,Gu Qian,Wang Xinwu.Experimental study on the seismic performance of three-dimensional beam to middle column connection with T-stub[J].Engineering Mechanics,2017,34(8):105-116.(in Chinese)
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[14]杨涛,张喜德,钟海牛,等.T形截面钢骨混凝土异形柱框架抗震性能拟动力试验[J].中南大学学报:自然科学版,2015,46(6):2171-2177.Yang Tao,Zhang Xide,Zhong Hainiu,et al.Pseudo-dynamic test on seismic behavior of frame with T-shaped SRC columns[J].Journal of Central South University(Science and Technology),2015,46(6):2171-2177.(in Chinese)
[15]薛建阳,张昭祥,刘祖强,等.实腹式型钢混凝土异形柱中框架拟静力试验及静力弹塑性分析[J].工程力学,2014,31(5):137-144.Xue Jianyang,Zhang Zhaoxiang,Liu Zuqiang,et al.Pseudo-static test and static elasto-plastic analysis of middle frame with solid steel reinforced concrete special-shaped columns[J].Engineering Mechanics,2014,31(5):137-144.(in Chinese)
[16]刘祖强,薛建阳,赵鸿铁.型钢混凝土异形柱框架滞回性能分析[J].工程力学,2016,33(7):73-83.Liu Zuqiang,Xue Jianyang,Zhao Hongtie.Analysis on hysteretic behavior of steel reinforced concrete frame with special-shaped columns[J].Engineering Mechanics,2016,33(7):73-83.(in Chinese)
[17]Wang G Y,Shi Y,Zhang D M,et al.Experimental research on post-fire seismic performance of steel reinforced concrete columns[J].Procedia Engineering,2017,210(11):456-463.
[18]GB 50010―2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.GB 50010―2010,Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[19]GB 50011―2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011―2010,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[20]JGJ 138―2001,型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2001.JGJ138-2001,Technical specification for steel reinforced concrete composnte structures[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
[21]任雯婷.非对称配钢型钢混凝土柱-钢梁框架结构抗震性能试验研究及有限元分析[D].荆州:长江大学,2018:33-46.Ren Wenting,Experimental study and finite element analysis on seismic behavior of frame structures composed of concrete encased columns with special section and steel beams[D].Jingzhou:Yangtze University,2018:33-46.(in Chinese)
[22]JGJ 101―96,建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.JGJ 101―96,Specificating of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese)
[23]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(1):1969-1990.
[2]Luo Y,Wang M Y,Zhou M,et al.Optimal topology design of steel-concrete composite structures under stiffness and strength constraints[J].Computers&Structures,2012,112(4):433-444.
[3]Papavasileiou G S,Charmpis D C.Seismic design optimization of multi-storey steel-concrete composite buildings[J].Computers&Structures,2016,170:49-61.
[4]张超,薛素铎,王广勇,等.火灾后型钢混凝土框架结构力学性能试验研究及分析[J].工程力学,2018,35(5):152―161.Zhang chao,Xue suduo,Wang guangyong,et al.Experimental research and analysis on the post-fire performance of steel reinforced concrete frame structures[J].Engineering Mechanics,2018,35(5):152―161.(in Chinese)
[5]邓明科,马福栋,李勃志,等.基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析[J].工程力学,2017,34(12):95―103.Deng Mingke,Ma Fudong,Li Bozhi,et al.Analysis on shear capacity of SRC deep beams based on modified strut-and-tie model[J].Engineering Mechanics,2017,34(12):95―103.(in Chinese)
[6]曾磊,涂祥,许成祥,等.非对称配钢钢骨混凝土柱抗震性能试验研究[J].建筑结构学报,2013,34(3):141-151.Zeng Lei,Tu Xiang,Xu Chengxiang,et al.Experimental study on seismic behavior of steel reinforced concrete column with unsymmetrical steel cross-sections[J].Journal of Building Structures,2013,34(3):141-151.(in Chinese)
[7]Xue B,Gong J.Study on steel reinforced concrete-filled GFRP tubular column under compression[J].Thin-Walled Structures,2016,106(4):1-8.
[8]曾磊,涂祥,吴园园.T形配钢型钢混凝土构件正截面承载力计算方法[J].工程力学,2013,30(10):115-121.Zeng Lei,Tu Xiang,Wu Yuanyuan.Normal section bearing capacity calculation of steel reinforced concrete members with T-shaped steel[J].Engineering Mechanics,2013,30(10):115-121.(in Chinese)
[9]Chen S,Wu P.Analytical model for predicting axial compressive behavior of steel reinforced concrete column[J].Journal of Constructional Steel Research,2017,128(1):649-660.
[10]曾磊,吴园园,张地,等.钢骨混凝土异形柱-钢梁节点抗震性能试验研究[J].振动与冲击,2016,35(4):224-229,240.Zeng Lei,Wu Yuanyuan,Zhang Di,et al.Tests for aseismic behavior of frame joints between a steel reinforced concrete special column and a steel beam[J].Journal of Vibration and Shock,2016,35(4):224-229,240.(in Chinese)
[11]布欣,谷倩,王新武.剖分T型钢梁柱连接框架中柱空间节点抗震试验研究[J].工程力学,2017,34(8):105-116.Bu Xin,Gu Qian,Wang Xinwu.Experimental study on the seismic performance of three-dimensional beam to middle column connection with T-stub[J].Engineering Mechanics,2017,34(8):105-116.(in Chinese)
[12]Braconi A,Elamary A,Salvatore W.Seismic behaviour of beam-to-column partial-strength joints for steelconcrete composite frames[J].Journal of Constructional Steel Research,2010,66(12):1431-1444.
[13]刘祖强,薛建阳,韩琛,等.实腹式型钢混凝土T形柱抗震性能试验研究[J].工程力学,2018,35(5):17-26.Liu Zuqiang,Xue Jianyang,Han Chen,et al.Experimental study on aseismic performance of solid steel reinforced concrete T-shaped column[J].Engineering Mechanics,2018,35(5):17-26.(in Chinese)
[14]杨涛,张喜德,钟海牛,等.T形截面钢骨混凝土异形柱框架抗震性能拟动力试验[J].中南大学学报:自然科学版,2015,46(6):2171-2177.Yang Tao,Zhang Xide,Zhong Hainiu,et al.Pseudo-dynamic test on seismic behavior of frame with T-shaped SRC columns[J].Journal of Central South University(Science and Technology),2015,46(6):2171-2177.(in Chinese)
[15]薛建阳,张昭祥,刘祖强,等.实腹式型钢混凝土异形柱中框架拟静力试验及静力弹塑性分析[J].工程力学,2014,31(5):137-144.Xue Jianyang,Zhang Zhaoxiang,Liu Zuqiang,et al.Pseudo-static test and static elasto-plastic analysis of middle frame with solid steel reinforced concrete special-shaped columns[J].Engineering Mechanics,2014,31(5):137-144.(in Chinese)
[16]刘祖强,薛建阳,赵鸿铁.型钢混凝土异形柱框架滞回性能分析[J].工程力学,2016,33(7):73-83.Liu Zuqiang,Xue Jianyang,Zhao Hongtie.Analysis on hysteretic behavior of steel reinforced concrete frame with special-shaped columns[J].Engineering Mechanics,2016,33(7):73-83.(in Chinese)
[17]Wang G Y,Shi Y,Zhang D M,et al.Experimental research on post-fire seismic performance of steel reinforced concrete columns[J].Procedia Engineering,2017,210(11):456-463.
[18]GB 50010―2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.GB 50010―2010,Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[19]GB 50011―2010,建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011―2010,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[20]JGJ 138―2001,型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2001.JGJ138-2001,Technical specification for steel reinforced concrete composnte structures[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
[21]任雯婷.非对称配钢型钢混凝土柱-钢梁框架结构抗震性能试验研究及有限元分析[D].荆州:长江大学,2018:33-46.Ren Wenting,Experimental study and finite element analysis on seismic behavior of frame structures composed of concrete encased columns with special section and steel beams[D].Jingzhou:Yangtze University,2018:33-46.(in Chinese)
[22]JGJ 101―96,建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.JGJ 101―96,Specificating of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese)
[23]Kent D C,Park R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(1):1969-1990.