型钢混凝土十形柱及其节点抗震性能演变、传递机制及设计理念
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摘要
为研究型钢混凝土十形柱与型钢混凝土十形柱框架节点在抗震性能方面的演变规律,通过13个型钢混凝土十形柱及其框架节点的反复荷载试验,揭示了型钢混凝土十形柱、十形柱平面节点、十形柱空间节点的震损机理及性能差异,深入分析了配钢形式、加载方向、剪跨比以及轴压比等关键参数对此类构件抗震性能的影响;考虑荷载加载方向对双向受剪性能的影响,提出了型钢混凝土十形柱及其节点的受剪承载力统一预测模型;采用Open SEEs零长单元并引入荷载加载角对弯曲型破坏的型钢混凝土十形柱双向压弯承载力进行了全过程受力性能模拟并证实其可行性。结果表明:型钢混凝土十形柱及其节点由平面受力转变至空间受力时,其受剪承载力和耗能能力也随之提高;十形柱的位移延性系数最大,而平面节点的位移延性系数最小。试验轴压比在0.5范围内时,提高轴压比有利于构件和节点受剪承载力及耗能能力的增长;试验轴压比小于0.3时,随着轴压比的增大,十形柱及其节点的延性随之提高,而试验轴压比大于0.3时则随之降低。型钢混凝土十形柱及其框架节点的弹性及弹塑性层间变形能力均大于规范规定的要求。基于综合性能研究成果,给出了型钢混凝土十形柱合理配钢形式的设计建议、轴压比控制原理、最不利地震作用验算方向等结构设计理念。
In order to investigate the seismic performance evolution from steel reinforced concrete(SRC) columns to their joints, thirteen cross-shaped SRC columns and the corresponding joints were tested under the cyclic reversed loading to study the seismic failure mechanism and performance difference of the specimens. The effect of steel form, loading direction, shear-span ratio and axial compression ratio on the seismic performance of cross-shaped SRC columns, planar joints and 3 D joints were deeply analyzed. The generalized prediction model of bi-directional shear carrying capacity of cross-shaped SRC columns and the corresponding joints was proposed considering the loading direction. The bi-compression-bending capacity of cross-shaped SRC columns was calculated and verified by using Zero Length Element in Open SEEs and by introducing the loading angle. The results show that when loading direction changes from 2 D to 3 D, the shear capacity and energy-dissipation capacity of cross-shaped SRC columns and the corresponding joints were enhanced accordingly. The displacement ductility coefficients in cross-shaped columns were the maximum, but those for planar joints were the minimum. When the test axial compression ratio is in the range of 0.5, the larger axial compression ratio may lead to higher shear capacity and energy-dissipating capacity of cross-shaped SRC columns and the corresponding joints. The ductility of cross-shaped SRC columns and the corresponding joints increases with the growth of axial compression ratio, when the test axial compression ratio is lower than 0.3; while the test axial compression ratio is over 0.3, the ductility of cross-shaped SRC columns and the corresponding joints decreases with the growth of axial compression ratio. The elastic and elastoplastic drifts of cross-shaped SRC columns and the corresponding joints are much larger than the requirement in Chinese Code. Finally, the design suggestion of reasonable steel form, the principle of axial compression ratio and the calculation direction of the most unfavorable earthquake action were proposed based on the comprehensive performance studies.
In order to investigate the seismic performance evolution from steel reinforced concrete(SRC) columns to their joints, thirteen cross-shaped SRC columns and the corresponding joints were tested under the cyclic reversed loading to study the seismic failure mechanism and performance difference of the specimens. The effect of steel form, loading direction, shear-span ratio and axial compression ratio on the seismic performance of cross-shaped SRC columns, planar joints and 3 D joints were deeply analyzed. The generalized prediction model of bi-directional shear carrying capacity of cross-shaped SRC columns and the corresponding joints was proposed considering the loading direction. The bi-compression-bending capacity of cross-shaped SRC columns was calculated and verified by using Zero Length Element in Open SEEs and by introducing the loading angle. The results show that when loading direction changes from 2 D to 3 D, the shear capacity and energy-dissipation capacity of cross-shaped SRC columns and the corresponding joints were enhanced accordingly. The displacement ductility coefficients in cross-shaped columns were the maximum, but those for planar joints were the minimum. When the test axial compression ratio is in the range of 0.5, the larger axial compression ratio may lead to higher shear capacity and energy-dissipating capacity of cross-shaped SRC columns and the corresponding joints. The ductility of cross-shaped SRC columns and the corresponding joints increases with the growth of axial compression ratio, when the test axial compression ratio is lower than 0.3; while the test axial compression ratio is over 0.3, the ductility of cross-shaped SRC columns and the corresponding joints decreases with the growth of axial compression ratio. The elastic and elastoplastic drifts of cross-shaped SRC columns and the corresponding joints are much larger than the requirement in Chinese Code. Finally, the design suggestion of reasonable steel form, the principle of axial compression ratio and the calculation direction of the most unfavorable earthquake action were proposed based on the comprehensive performance studies.
引文
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[12]陈宗平,徐金俊,陈宇良,等.基于修正Park-Ang模型的型钢混凝土异形柱框架节点地震损伤研究[J].建筑结构学报,2015,36(8):90-98(Chen Zongping,Xu Jinjun,Chen Yuliang,et al.Seismic damage of SRC special shaped column frame joints based on modified Park-Ang model[J].Journal of Building Structures,2015,36(8):90-98(in Chinese))
[13]JGJ 149—2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006(JGJ 149—2006 Technical specification for concrete structures with specially shaped columns[S].Beijing:China Architecture and Building Press,2006(in Chinese))
[14]张素梅,刘界鹏,王玉银,等.双向压弯方钢管高强混凝土构件滞回性能试验与分析[J].建筑结构学报,2005,26(3):9-18(Zhang Sumei,Liu Jiepeng,Wang Yuyin,et al.Hysteretic behavior of biaxially loaded high strength concrete-filled square hollow section beam-columns[J].Journal of Building Structures,2005,26(3):9-18(in Chinese))
[15]薛建阳,刘祖强.型钢混疑土异形柱框架抗震分析与设计[M].北京:科学出版社,2013
[16]陈宗平,徐金俊,薛建阳,等.基于变形和能量双重准则的型钢混凝土异形柱地震损伤行为研究[J].土木工程学报,2015,48(8):29-37(Chen Zongping,Xu Jinjun,Xue Jianyang,et al.Deformation and energy-based seismic damage behavior of SRC specially shaped columns[J].China Civil Engineering Journal,2015,48(8):29-37(in Chinese))
[17]Chen Z P,Xu J J,Chen Y L,et al.Axial compression ratio limit values for steel reinforced concrete(SRC)special shaped columns[J].Steel and Composite Structures,2016,20(2):295-316
[2]陈宗平,王妮,钟铭,等.型钢混凝土异形柱正截面承载力试验及有限元分析[J].建筑结构学报,2013,34(10):108-119(Chen Zongping,Wang Ni,Zhong Ming,et al.Experimental study and finite element analysis on normal section bearing capacity of steel reinforced concrete special-shaped columns[J].Journal of Building Structures,2013,34(10):108-119(in Chinese))
[3]Chen Z P,Xu J J,Xue J Y.Hysteretic behavior of special shaped columns composed of steel and reinforced concrete(SRC)[J].Earthquake Engineering and Engineering Vibration,2015,14(2):329-345
[4]薛建阳,韩琛,刘祖强,等.不同加载方式下实腹式型钢混凝土T形截面柱损伤试验研究[J].建筑结构学报,2016,37(5):112-121(Xue Jianyang,Han Chen,Liu Zuqiang,et al.Experimental investigation on damage of solid-web steel reinforced concrete T-shaped columns under different loading patterns[J].Journal of Building Structures,2016,37(5):112-121(in Chinese))
[5]方林,张波,金国芳,等.型钢混凝土十字形异形柱抗震性能试验及有限元分析[J].中南大学学报:自然科学版,2015,46(3):1027-1033(Fang Lin,Zhang Bo,Jin Guofang,et al.Experimental study and finite element analysis on seismic behavior of steel reinforced concrete cross-shaped columns[J].Journal of Central South University:Science and Technology Edition,2015,46(3):1027-1033(in Chinese))
[6]薛建阳,刘义,赵鸿铁,等.型钢混凝土异形柱框架节点抗震性能试验研究[J].建筑结构学报,2009,30(4):69-77(Xue Jianyang,Liu Yi,Zhao Hongtie,et al.Experimental study on seismic behavior of steel reinforced concrete special-shaped column-beam joints[J].Journal of Building Structures,2009,30(4):69-77(in Chinese))
[7]Chen Z P,Xu J J,Xue J Y,et al.Seismic behavior of steel reinforced concrete(SRC)T-shaped column-beam planar and 3D hybrid joints under cyclic loads[J].Earthquakes and Structures,2015,8(3):553-572
[8]陈宗平,徐金俊,薛建阳.型钢混凝土十形截面柱-梁平面与空间节点滞回性能试验研究[J].建筑结构学报,2014,35(8):80-87(Chen Zongping,Xu Jinjun,Xue Jianyang.Experimental investigation on hysteretic behavior of planar and 3D joints in cruciform SRC column frame[J].Journal of Building Structures,2014,35(8):80-87(in Chinese))
[9]薛建阳,陈宗平,赵鸿铁.型钢混凝土异形柱结构的性能、设计方法及其工程应用[M].北京:中国建筑工业出版社,2011
[10]张士前,陈宗平,王妮,等.型钢混凝土十形柱空间节点受剪机理及抗剪强度研究[J].土木工程学报,2014,47(9):84-93(Zhang Shiqian,Chen Zongping,Wang Ni,et al.Shear mechanism and shear strength of steel reinforced concrete(SRC)cross-shaped 3D column-beam joints[J].China Civil Engineering Journal,2014,47(9):84-93(in Chinese))
[11]JGJ 101—1996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—1996 Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997(in Chinese))
[12]陈宗平,徐金俊,陈宇良,等.基于修正Park-Ang模型的型钢混凝土异形柱框架节点地震损伤研究[J].建筑结构学报,2015,36(8):90-98(Chen Zongping,Xu Jinjun,Chen Yuliang,et al.Seismic damage of SRC special shaped column frame joints based on modified Park-Ang model[J].Journal of Building Structures,2015,36(8):90-98(in Chinese))
[13]JGJ 149—2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006(JGJ 149—2006 Technical specification for concrete structures with specially shaped columns[S].Beijing:China Architecture and Building Press,2006(in Chinese))
[14]张素梅,刘界鹏,王玉银,等.双向压弯方钢管高强混凝土构件滞回性能试验与分析[J].建筑结构学报,2005,26(3):9-18(Zhang Sumei,Liu Jiepeng,Wang Yuyin,et al.Hysteretic behavior of biaxially loaded high strength concrete-filled square hollow section beam-columns[J].Journal of Building Structures,2005,26(3):9-18(in Chinese))
[15]薛建阳,刘祖强.型钢混疑土异形柱框架抗震分析与设计[M].北京:科学出版社,2013
[16]陈宗平,徐金俊,薛建阳,等.基于变形和能量双重准则的型钢混凝土异形柱地震损伤行为研究[J].土木工程学报,2015,48(8):29-37(Chen Zongping,Xu Jinjun,Xue Jianyang,et al.Deformation and energy-based seismic damage behavior of SRC specially shaped columns[J].China Civil Engineering Journal,2015,48(8):29-37(in Chinese))
[17]Chen Z P,Xu J J,Chen Y L,et al.Axial compression ratio limit values for steel reinforced concrete(SRC)special shaped columns[J].Steel and Composite Structures,2016,20(2):295-316