型钢混凝土L形柱空间角节点抗震性能分析
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摘要
为研究型钢混凝土L形柱空间角节点的抗震性能,对8个节点试件进行低周反复荷载试验和有限元模拟,二者结果吻合较好。基于此考虑了柱配钢形式、轴压比和加载角度3个变化参数,通过ABAQUS非线性有限元模拟,分析了变化参数对其峰值荷载、耗能和延性的影响规律,并提出可供工程设计参考的建议。研究结果表明,型钢混凝土L形柱空间角节点破坏形态以剪切斜压和弯曲破坏为主,扭转伴随黏结破坏为辅;实腹配钢试件综合抗震性能最好,其峰值荷载较空腹配钢试件提高了10%;随轴压比的增加,不同配钢形式试件的位移延性下降程度不同,实腹配钢试件下降缓慢,建议轴压比限值设计值为0.5;45°加载角度以内,随着加载角度的增加,峰值荷载增加,耗能和延性逐渐降低,45°加载试件与0°平面节点相比,峰值荷载提高了约30%,延性系数降低约10%,最不利加载方向为0°加载。
In order to study the seismic performance of steel reinforced concrete L-shaped column space corner joints, low-cycle reversed loading tests and finite element simulations for 8 specimens were carried out. It indicated that the results of the numerical analysis exhibited a good agreement with those of experiments. While considering three parameters based on the above results, which were the column section steel form, load angle and axial compression ratio, the influences of the three parameters on the seismic performance indicators including the peak load, energy dissipation capacity and displacement ductility were analyzed by using Abaqus nonlinear finite element simulation. Suggestions for engineering design reference were proposed. The results indicated that the failure pattern of steel reinforced concrete L-shaped column space corner joints is dominated by compression-shear and flexural failure, followed by torsion and bond failure. The overall seismic performance of the solid web steel specimen is the best, with its peak load increased by 10% as compared with hollow steel specimens. While increasing the axial compression ratio, the displacement ductility of the specimens with different forms of steel was decreased by different degrees, with solid web steel specimens declining slowly. A value of 0.5 was suggested for the axial compression ratio limit for design. Moreover, when the load angle is less than 45°, the peak load increased while the energy dissipation and ductility decreased gradually with the increase of the load angle. The peak load and the ductility coefficient of the 45° loading specimens were increased by about 30% and decreased by 10% as compared with the 0° loading specimens, which is the most disadvantageous loading direction.
In order to study the seismic performance of steel reinforced concrete L-shaped column space corner joints, low-cycle reversed loading tests and finite element simulations for 8 specimens were carried out. It indicated that the results of the numerical analysis exhibited a good agreement with those of experiments. While considering three parameters based on the above results, which were the column section steel form, load angle and axial compression ratio, the influences of the three parameters on the seismic performance indicators including the peak load, energy dissipation capacity and displacement ductility were analyzed by using Abaqus nonlinear finite element simulation. Suggestions for engineering design reference were proposed. The results indicated that the failure pattern of steel reinforced concrete L-shaped column space corner joints is dominated by compression-shear and flexural failure, followed by torsion and bond failure. The overall seismic performance of the solid web steel specimen is the best, with its peak load increased by 10% as compared with hollow steel specimens. While increasing the axial compression ratio, the displacement ductility of the specimens with different forms of steel was decreased by different degrees, with solid web steel specimens declining slowly. A value of 0.5 was suggested for the axial compression ratio limit for design. Moreover, when the load angle is less than 45°, the peak load increased while the energy dissipation and ductility decreased gradually with the increase of the load angle. The peak load and the ductility coefficient of the 45° loading specimens were increased by about 30% and decreased by 10% as compared with the 0° loading specimens, which is the most disadvantageous loading direction.
引文
[1]李哲,张小峰,郭增玉,等.钢骨混凝土T形截面短柱力学性能的试验研究[J].土木工程学报,2007,40(1):1―5.Li Zhe,Zhang Xiaofeng,Guo Zengyu,et al.Experimental study on the mechanical property of steel reinforced concrete short columns of T-shaped cross-section[J].China Civil Engineering Journal,2007,40(1):1―5.(in Chinese)
[2]柯晓军,陈宗平,薛建阳,等.反复荷载下型钢混凝土异形柱粘结滑移性能研究[J].工程力学,2013,30(2):211―218.Ke Xiaojun,Chen Zongping,Xue Jianyang,et al.Study on bond slip behavior of SRC special-shaped columns under cyclic reversed loading[J].Engineering Mechanics,2013,30(2):211―218.(in Chinese)
[3]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱抗震性能试验研究[J].建筑结构学报,2007,28(3):53―61.Chen Zongping,Xue Jianyang,Zhao Hongtie,et al.Experimental research on seismic behavior of steel reinforced concrete special-shaped columns[J].Journal of Building Structures,2007,28(3):53―61.(in Chinese)
[4]Tokgoz S,Dundar C.Tests of eccentrically loaded L-shaped section steel fibre high strength reinforced concrete and composite columns[J].Engineering Structures,2012,38(5):134―141.
[5]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 research on seismic behavior of steel reinforced concrete special-shaped column-beam joints[J].Journal of Building Structures,2009,30(4):69―77.(in Chinese)
[6]Rong X,Zhang J X,Li Y Y.Seismic behavior of shaped column joints with X-shaped reinforcement[J].Transactions of Tianjin University,2013,19(2):110―117.
[7]邓志恒,唐光暹,向平,等.钢骨混凝土T形截面柱节点抗震性能研究[J].建筑结构,2010,40(6):44―47.Deng Zhiheng,Tang Guangxian,Xiang Ping,et al.Experimental study on seismic behavior of SRC T-shaped column joints under low cyclic reversed loading[J].Building Structures,2010,40(6):44―47.(in Chinese)
[8]Li L M,Mander J B,Dhakal R P.Bidirectional cyclic loading experiment on a 3D beam-column joint designed for damage avoidance[J].Journal of Structural Engineering,2008,134(11):1733―1742.
[9]樊健生,周慧,聂建国,等.双向荷载作用下方钢管混凝土柱-组合梁空间节点抗震性能试验研究[J].建筑结构学报,2012,33(6):50―58.Fan Jiansheng,Zhou Hui,Nie Jianguo,et al.Research on seismic responses of 3D joints with CFT column and composite beam under bi-directional loading[J].Journal of Building Structures,2012,33(6):50―58.(in Chinese)
[10]薛伟辰,姜东升,陈以一,等.预应力混凝土空间节点抗震性能试验研究[J].建筑结构学报,2007,28(1):43―51.Xue Weichen,Jiang Dongsheng,Chen Yiyi,et al.Experimental study of seismic performance of prestressed concrete spatial joints[J].Jourmal of Building Structures,2007,28(1):43―51.(in Chinese)
[11]陈宗平,徐金俊,薛建阳.型钢混凝土异形柱-钢梁空间边节点的抗震性能及影响因素分析[J].工程力学,2015,32(2):105―113.Chen Zongping,Xu Jinjun,Xue Jianyang.Seismic behavior and influence factor analysis on 3D side joints composed of steel reinforced concrete special-shaped columns and steel beams[J].Engineering Mechanics,2015,32(2):105―113.(in Chinese)
[12]王妮,陈宗平,张士前,等.型钢混凝土异形柱中节点受力性能试验及有限元分析[J].建筑结构学报,2013,34(s1):102―109.Wang Ni,Chen Zongping,Zhang Shiqian,et al.Experimental research and FEA on mechanical behavior of steel interior joint between SRC special shaped column and steel beam[J].Journal of Building Structures,2013,34(s1):102―109.(in Chinese)
[13]王妮,陈宗平,陈宇良,等.反复荷载下型钢混凝土异形柱空间角节点破坏机理及损伤分析[J].工程力学,2015,32(3):140―150.Wang Ni,Chen Zongping,Chen Yuliang,et al.Failure mechanism damage analysis of space corner joint of SRC L-shaped columns under cyclic loading[J].Engineering Mechanics,2015,32(3):140―150.(in Chinese)
[14]徐金俊.型钢混凝土T形柱-钢梁空间节点的震损机制与计算理论[D].南宁:广西大学,2016.Xu Jinjun.Seismic damage mechanism and calculation theory for T-shaped steel reinforced concrete column-steel beam 3D joints[D].Nanning:Guangxi University,2016.(in Chinese)
[15]贾金青,姜睿,厚童.钢骨超高强混凝土框架柱抗震性能的试验研究[J].土木工程学报,2006,39(8):14―18.Jia Jinqing,Jiang Rui,Hou Tong.An experimental study on the seismic performance of steel reinforced super high-strength concrete columns[J].China Civil Engineering Journal,2006,39(8):14―18.(in Chinese)
[16]鉄骨鉄筋コンクーリト構造計算規準.同解說[S].第5版.东京:日本建築学会,2001.Standard for structural calculation about steel reinforced concrete.Commentary[S].5th ed.Tokyo:Japanese Architecture Institute,2001.(in Japanese)
[2]柯晓军,陈宗平,薛建阳,等.反复荷载下型钢混凝土异形柱粘结滑移性能研究[J].工程力学,2013,30(2):211―218.Ke Xiaojun,Chen Zongping,Xue Jianyang,et al.Study on bond slip behavior of SRC special-shaped columns under cyclic reversed loading[J].Engineering Mechanics,2013,30(2):211―218.(in Chinese)
[3]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱抗震性能试验研究[J].建筑结构学报,2007,28(3):53―61.Chen Zongping,Xue Jianyang,Zhao Hongtie,et al.Experimental research on seismic behavior of steel reinforced concrete special-shaped columns[J].Journal of Building Structures,2007,28(3):53―61.(in Chinese)
[4]Tokgoz S,Dundar C.Tests of eccentrically loaded L-shaped section steel fibre high strength reinforced concrete and composite columns[J].Engineering Structures,2012,38(5):134―141.
[5]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 research on seismic behavior of steel reinforced concrete special-shaped column-beam joints[J].Journal of Building Structures,2009,30(4):69―77.(in Chinese)
[6]Rong X,Zhang J X,Li Y Y.Seismic behavior of shaped column joints with X-shaped reinforcement[J].Transactions of Tianjin University,2013,19(2):110―117.
[7]邓志恒,唐光暹,向平,等.钢骨混凝土T形截面柱节点抗震性能研究[J].建筑结构,2010,40(6):44―47.Deng Zhiheng,Tang Guangxian,Xiang Ping,et al.Experimental study on seismic behavior of SRC T-shaped column joints under low cyclic reversed loading[J].Building Structures,2010,40(6):44―47.(in Chinese)
[8]Li L M,Mander J B,Dhakal R P.Bidirectional cyclic loading experiment on a 3D beam-column joint designed for damage avoidance[J].Journal of Structural Engineering,2008,134(11):1733―1742.
[9]樊健生,周慧,聂建国,等.双向荷载作用下方钢管混凝土柱-组合梁空间节点抗震性能试验研究[J].建筑结构学报,2012,33(6):50―58.Fan Jiansheng,Zhou Hui,Nie Jianguo,et al.Research on seismic responses of 3D joints with CFT column and composite beam under bi-directional loading[J].Journal of Building Structures,2012,33(6):50―58.(in Chinese)
[10]薛伟辰,姜东升,陈以一,等.预应力混凝土空间节点抗震性能试验研究[J].建筑结构学报,2007,28(1):43―51.Xue Weichen,Jiang Dongsheng,Chen Yiyi,et al.Experimental study of seismic performance of prestressed concrete spatial joints[J].Jourmal of Building Structures,2007,28(1):43―51.(in Chinese)
[11]陈宗平,徐金俊,薛建阳.型钢混凝土异形柱-钢梁空间边节点的抗震性能及影响因素分析[J].工程力学,2015,32(2):105―113.Chen Zongping,Xu Jinjun,Xue Jianyang.Seismic behavior and influence factor analysis on 3D side joints composed of steel reinforced concrete special-shaped columns and steel beams[J].Engineering Mechanics,2015,32(2):105―113.(in Chinese)
[12]王妮,陈宗平,张士前,等.型钢混凝土异形柱中节点受力性能试验及有限元分析[J].建筑结构学报,2013,34(s1):102―109.Wang Ni,Chen Zongping,Zhang Shiqian,et al.Experimental research and FEA on mechanical behavior of steel interior joint between SRC special shaped column and steel beam[J].Journal of Building Structures,2013,34(s1):102―109.(in Chinese)
[13]王妮,陈宗平,陈宇良,等.反复荷载下型钢混凝土异形柱空间角节点破坏机理及损伤分析[J].工程力学,2015,32(3):140―150.Wang Ni,Chen Zongping,Chen Yuliang,et al.Failure mechanism damage analysis of space corner joint of SRC L-shaped columns under cyclic loading[J].Engineering Mechanics,2015,32(3):140―150.(in Chinese)
[14]徐金俊.型钢混凝土T形柱-钢梁空间节点的震损机制与计算理论[D].南宁:广西大学,2016.Xu Jinjun.Seismic damage mechanism and calculation theory for T-shaped steel reinforced concrete column-steel beam 3D joints[D].Nanning:Guangxi University,2016.(in Chinese)
[15]贾金青,姜睿,厚童.钢骨超高强混凝土框架柱抗震性能的试验研究[J].土木工程学报,2006,39(8):14―18.Jia Jinqing,Jiang Rui,Hou Tong.An experimental study on the seismic performance of steel reinforced super high-strength concrete columns[J].China Civil Engineering Journal,2006,39(8):14―18.(in Chinese)
[16]鉄骨鉄筋コンクーリト構造計算規準.同解說[S].第5版.东京:日本建築学会,2001.Standard for structural calculation about steel reinforced concrete.Commentary[S].5th ed.Tokyo:Japanese Architecture Institute,2001.(in Japanese)