SCFST柱框架-支撑结构恢复力模型
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摘要
通过对SCFST柱框架-支撑结构进行拟静力性能研究发现,支撑、梁、柱依次发生破坏,结构破坏机制合理,滞回曲线呈梭形,无捏拢现象,耗能能力良好,骨架曲线的下降过程较为平缓,延性较好,结构在整体上表现出较好的抗震性能,有限元数值模拟与试验结果符合程度较高,验证了有限元模型的正确性。主要研究支撑两边柱的轴压比、单肢柱不同组合截面形式和框架-支撑结构中支撑钢管的刚度等因素,基于大量的有限元数值模型对其进行分析,得到了SCFST柱框架-支撑抗侧力结构的恢复力模型。运用回归分析方法建立结构的三折线骨架模型,明确了SCFST柱框架-支撑结构的滞回和退化规律,建立了此体系框架-支撑结构简化的滞回模型,并与试验结果进行对比分析,二者骨架曲线基本一致,滞回环形状均呈近似的平行四边形,吻合度较高。
Special-shaped column composed of concrete-filled square steel tubes(the SCFST column)braced frame has broad prospects of applications in high-rise steel structure residence for the reason that it represents considerable lateral stiffness,good seismic performance and outstanding architecture effect.Quasi-static tests were conducted to explore the seismic behavior mechanism,and beams and columns were destroyed in turn.The hysteretic curves of the structure were diamond-shaped with no pinch phenomenon,which illustrated that the structure performed well in energy dissipation.The structure had good ductility and seismic behavior in that the skeleton curve declined slowly.The finite element(FE)numerical simulation agreed well with the experimental result,verifying the correctness of the FE model.The restoring force model of the SCFST column-steel beam braced frame took axial compression ratio,the section of the column and the stiffness of the brace as main research factors.By linear regression analysis,the trilinear skeleton model was established which showed the hysteretic behavior and stiffness degradation of the SCFST column braced frame.As seen by from the comparison of the results of the model with those of the experiment,the skeleton curves of the model and the experiment were nearly the same,both of the hysteretic curves were in the shape of a parallelogram,and the anastomosis degree was high.In conclusions the restoring force model is an effective way to simulate the behavior of the frame and it canpresent the load displacement curve of the SCFST column braced frame under low reversed cyclic loading.
Special-shaped column composed of concrete-filled square steel tubes(the SCFST column)braced frame has broad prospects of applications in high-rise steel structure residence for the reason that it represents considerable lateral stiffness,good seismic performance and outstanding architecture effect.Quasi-static tests were conducted to explore the seismic behavior mechanism,and beams and columns were destroyed in turn.The hysteretic curves of the structure were diamond-shaped with no pinch phenomenon,which illustrated that the structure performed well in energy dissipation.The structure had good ductility and seismic behavior in that the skeleton curve declined slowly.The finite element(FE)numerical simulation agreed well with the experimental result,verifying the correctness of the FE model.The restoring force model of the SCFST column-steel beam braced frame took axial compression ratio,the section of the column and the stiffness of the brace as main research factors.By linear regression analysis,the trilinear skeleton model was established which showed the hysteretic behavior and stiffness degradation of the SCFST column braced frame.As seen by from the comparison of the results of the model with those of the experiment,the skeleton curves of the model and the experiment were nearly the same,both of the hysteretic curves were in the shape of a parallelogram,and the anastomosis degree was high.In conclusions the restoring force model is an effective way to simulate the behavior of the frame and it canpresent the load displacement curve of the SCFST column braced frame under low reversed cyclic loading.
引文
[1]韩林海.钢管混凝土结构-理论与实践(第二版)[M].北京:科学出版社,2007.HAN Linhai.Concrete filled steel tube-theory and practice(the Second edition)[M].Beijing:Science Press,2007.(in Chinese)
[2]雷敏,沈祖炎,李元齐,等.异形钢管混凝土柱研究现状[J].结构工程师,2013,29(3):155-163.LEI Min,SHEN Zuyan,LI Yuanqi,et al.State-of-the-art of concrete-filled specially shaped steel tubes[J].Structural Engineers,2013,29(3):155-163.(in Chinese)
[3]Chen Z H,Rong B,Fafitis A.Axial compression stability of a crisscross section column composed of concrete-filled square steel tubes[J].Journal of Mechanics of Materials and Structures,2010,4(10):1787-1799.
[4]Zhou T,Xu M Y,Chen Z H,et al.Eccentric loading behavior of L-Shaped columns composed of concrete-filled steel tubes[C]//Zhou T,Xu M Y,Chen Z H,et al.eds.Volume 12 Number 3.The Hong Kong Institute of Steel Construction,2016:227-244.
[5]Zhou T,Chen Z H,Liu H B.Seismic behavior of special shaped column composed of concrete filled steel tubes[J].Journal of Constructional Steel Research,2012,75:131-141.
[6]陈志华,苗纪奎,赵莉华,等.方钢管混凝土柱-H型钢梁节点研究[J].建筑结构,2007,37(1):50-56,59.CHEN Zhihua,MIAO Jikui,ZHAO Lihua,et al.Study on joint of concrete-filled rectangular tublar column and Hshaped steel beam[J].Building Structure,2007,37(1):50-56,59.(in Chinese)
[7]王亚雯,闫翔宇,周婷.SCFT柱-H型钢梁平面框架抗震性能分析[J].天津大学学报(自然科学与工程技术版),2015,48(B07):9-16.WANG Yawen,YAN Xiangyu,ZHOU Ting.Seismic behavior of SCFT column-h section steel beam plane frame[J].Journal of Tianjin University(Science and Technology),2015,48(B07):9-16.(in Chinese)
[8]Zhou T,Jia Y M,Xu M Y,et al.Experimental study on the seismic performance of L-shaped column composed of concrete-filled steel tubes frame structures[J].Journal of Constructional Steel Research,2015,114:77-88.
[9]Zhao B Z,Zhou T,Chen Z H,et al.Experimental seismic behavior of SCFRT column chevron concentrically braced frames[J].Journal of Constructional Steel Research,2017,133:141-155.
[10]沈聚敏.抗震工程学[M].北京:中国建筑工业出版社,2000.SHEN Jumin.Asesimic Engineering[M].Beijing:China Building Industry Press,2000.(in Chinese)
[11]王来,王铁成,齐建伟,等.方钢管混凝土框架滞回性能试验与理论研究[J].天津大学学报(自然科学与工程技术版),2005,38(1):41-46.WANG Lai,WANG Tiecheng,QI Jianwei,et al.Experimental and theoretical study on hysteretic behavior of concrete-filled rectangular steel tubular frame[J].Journal of Tianjin University(Science and Technology),2005,38(1):41-46.(in Chinese)
[12]王先铁,周超,马尤苏夫,等.方钢管混凝土平面框架的恢复力模型研究[J].地震工程与工程振动,2014,34(5):94-99.WANG Xiantie,ZHOU Chao,MA Yousufu,et al.Study on restoring force model of concrete filled square steel tube planar frames[J].Earthquake Engineering and Engineering Dynamics,2014,34(5):94-99.(in Chinese)
[13]张向冈,陈宗平,薛建阳,等.钢管再生混凝土框架的恢复力模型研究[J].世界地震工程,2016,32(1):277-283.ZHANG Xianggang,CHEN Zongping,XUE Jianyang,et al.Study on restoring force model of recycled aggregate concrete filled steel tube frame[J].World Earthquake Engineering,2016,32(1):277-283.(in Chinese)
[14]王铁成,李新华,王天柱,等.反复荷载作用下的异形柱框架滞回性能[J].吉林大学学报(工学版),2007,37(1):224-228.WANG Tiecheng,LI Xinhua,WANG Tianzhu,et al.Hysteretic behavior of frame with specially shaped columns subjected to cyclic loading[J].Journal of Jilin University Engineering and Technology Edition,2007,37(1):224-228.(in Chinese)
[2]雷敏,沈祖炎,李元齐,等.异形钢管混凝土柱研究现状[J].结构工程师,2013,29(3):155-163.LEI Min,SHEN Zuyan,LI Yuanqi,et al.State-of-the-art of concrete-filled specially shaped steel tubes[J].Structural Engineers,2013,29(3):155-163.(in Chinese)
[3]Chen Z H,Rong B,Fafitis A.Axial compression stability of a crisscross section column composed of concrete-filled square steel tubes[J].Journal of Mechanics of Materials and Structures,2010,4(10):1787-1799.
[4]Zhou T,Xu M Y,Chen Z H,et al.Eccentric loading behavior of L-Shaped columns composed of concrete-filled steel tubes[C]//Zhou T,Xu M Y,Chen Z H,et al.eds.Volume 12 Number 3.The Hong Kong Institute of Steel Construction,2016:227-244.
[5]Zhou T,Chen Z H,Liu H B.Seismic behavior of special shaped column composed of concrete filled steel tubes[J].Journal of Constructional Steel Research,2012,75:131-141.
[6]陈志华,苗纪奎,赵莉华,等.方钢管混凝土柱-H型钢梁节点研究[J].建筑结构,2007,37(1):50-56,59.CHEN Zhihua,MIAO Jikui,ZHAO Lihua,et al.Study on joint of concrete-filled rectangular tublar column and Hshaped steel beam[J].Building Structure,2007,37(1):50-56,59.(in Chinese)
[7]王亚雯,闫翔宇,周婷.SCFT柱-H型钢梁平面框架抗震性能分析[J].天津大学学报(自然科学与工程技术版),2015,48(B07):9-16.WANG Yawen,YAN Xiangyu,ZHOU Ting.Seismic behavior of SCFT column-h section steel beam plane frame[J].Journal of Tianjin University(Science and Technology),2015,48(B07):9-16.(in Chinese)
[8]Zhou T,Jia Y M,Xu M Y,et al.Experimental study on the seismic performance of L-shaped column composed of concrete-filled steel tubes frame structures[J].Journal of Constructional Steel Research,2015,114:77-88.
[9]Zhao B Z,Zhou T,Chen Z H,et al.Experimental seismic behavior of SCFRT column chevron concentrically braced frames[J].Journal of Constructional Steel Research,2017,133:141-155.
[10]沈聚敏.抗震工程学[M].北京:中国建筑工业出版社,2000.SHEN Jumin.Asesimic Engineering[M].Beijing:China Building Industry Press,2000.(in Chinese)
[11]王来,王铁成,齐建伟,等.方钢管混凝土框架滞回性能试验与理论研究[J].天津大学学报(自然科学与工程技术版),2005,38(1):41-46.WANG Lai,WANG Tiecheng,QI Jianwei,et al.Experimental and theoretical study on hysteretic behavior of concrete-filled rectangular steel tubular frame[J].Journal of Tianjin University(Science and Technology),2005,38(1):41-46.(in Chinese)
[12]王先铁,周超,马尤苏夫,等.方钢管混凝土平面框架的恢复力模型研究[J].地震工程与工程振动,2014,34(5):94-99.WANG Xiantie,ZHOU Chao,MA Yousufu,et al.Study on restoring force model of concrete filled square steel tube planar frames[J].Earthquake Engineering and Engineering Dynamics,2014,34(5):94-99.(in Chinese)
[13]张向冈,陈宗平,薛建阳,等.钢管再生混凝土框架的恢复力模型研究[J].世界地震工程,2016,32(1):277-283.ZHANG Xianggang,CHEN Zongping,XUE Jianyang,et al.Study on restoring force model of recycled aggregate concrete filled steel tube frame[J].World Earthquake Engineering,2016,32(1):277-283.(in Chinese)
[14]王铁成,李新华,王天柱,等.反复荷载作用下的异形柱框架滞回性能[J].吉林大学学报(工学版),2007,37(1):224-228.WANG Tiecheng,LI Xinhua,WANG Tianzhu,et al.Hysteretic behavior of frame with specially shaped columns subjected to cyclic loading[J].Journal of Jilin University Engineering and Technology Edition,2007,37(1):224-228.(in Chinese)