耗能梁段与RC框架梁连接节点滞回性能的有限元分析
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摘要
为了系统研究耗能梁段与RC框架梁连接节点的滞回性能,基于文献[11]所进行的低周往复加载试验,以S-5试件为BASE试件,设计了螺杆布置位置、螺杆数量、U型板侧边加胶、底板长度、螺杆钢材强度等级5个系列9个试件。采用ABAQUS对S-5及系列试件的滞回性能进行了模拟,分析了相关设计参数对连接节点滞回性能、承载力、抗侧刚度、耗能的影响规律。研究结果表明:耗能梁段与RC梁之间的连接可采用螺杆加外包钢的构造方式,螺杆位置、底板长度、螺杆钢材强度等级对此类节点的力学性能影响相对较小。但螺杆数量需合理确定,其数量过少将导致螺杆承载力不足,节点易发生脆性破坏。U型侧板同RC梁侧面增设结构胶可改善节点的刚度、承载力及耗能能力。
In order to investigate the hysteretic behavior of the connection between RC frame beam and energy dissipation link,the test specimen S-5 in reference [11] is selected as the base model for a further FE analysis.A series of models are designed,with critical parameters such as the layout of steel shaft,the number of steel shaft,structural glue,the length of bottom plate,and steel strength of steel shaft.The ABAQUS program is used to simulate the structural performance of this connection,and the hysteretic behavior,lateral strength,stiffness degradation and energy dissipation are analyzed.The results show that the connected detail between RC beam and energy dissipation link can use steel shaft and U-shape steel plate.The layout of steel shaft,length of bottom plate,and strength of steel shaft had a slight effect on the hysteretic behavior of connection.The number of steel shaft should be determined reasonablly,which would lead to the fracture failure due to less steel shaft number.In addition,the structural glue used between RC beam and U shaped steel plate can increase the stiffness,lateral strength and energy dissipation.
In order to investigate the hysteretic behavior of the connection between RC frame beam and energy dissipation link,the test specimen S-5 in reference [11] is selected as the base model for a further FE analysis.A series of models are designed,with critical parameters such as the layout of steel shaft,the number of steel shaft,structural glue,the length of bottom plate,and steel strength of steel shaft.The ABAQUS program is used to simulate the structural performance of this connection,and the hysteretic behavior,lateral strength,stiffness degradation and energy dissipation are analyzed.The results show that the connected detail between RC beam and energy dissipation link can use steel shaft and U-shape steel plate.The layout of steel shaft,length of bottom plate,and strength of steel shaft had a slight effect on the hysteretic behavior of connection.The number of steel shaft should be determined reasonablly,which would lead to the fracture failure due to less steel shaft number.In addition,the structural glue used between RC beam and U shaped steel plate can increase the stiffness,lateral strength and energy dissipation.
引文
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[10]何绪杰,于安林,方有珍.RC框架内填Y型偏心钢支撑的有限元分析[J].苏州科技学院学报(工程技术版),2010,23(1):34～39He Xu-jie,Yu An-lin,Fang You-zhen.Finite Element Analysis of RC Frames with Y-eccentrically Brace[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(1):34～39(in Chinese)
[11]盛邵山.耗能梁段与RC框架梁连接节点的滞回性能研究[D].苏州:苏州科技学院,2012Sheng Shao-shan.Hysteretic Behavior of the Connection between RC Frame Beam and Energy Dissipation Link[D].Suzhou:Suzhou University of Science and Technology,2012(in Chinese)
[12]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006Wang Jin-chang,Chen Ye-kai.Application of ABAQUS in Civil Engineering[M].Hangzhou:Zhejiang University Press,2006(in Chinese)
[2]Abou-Elfath H,Ghobarah A.Behaviour of Reinforced Concrete Frames Rehabilitated with Concentric Steel Bracing[J].Canadian Journal of Civil Engineering,2000,27:433～444
[3]Maheri M R,Kousari R,Razazan M.Pushover Tests on Steel X-braced and Knee-braced RC Frames[J].Engineering Structures,2003,25:1697～1705
[4]Youssef M A,Ghaffarzadeh H,Nehdi M.Seismic Performance of RC Frames with Concentric Internal Steel Bracing[J].Engineering Structures2007,29(7):1561～1568
[5]Maheri M R,Ghaffarzadeh H.Connection Overstrength in Steel-braced RC Frames[J].Engineering Structures,2008,30:1938～1948
[6]张斌,李晓燕,于安林.Y型支撑钢框架抗震性能研究[J].西安建筑科技大学学报(自然科学版),2000,32(1):20～23Zhang Bin,Li Xiao-yan,Yu An-lin.An Analysis on the Aseismic Property of Y-type Eccentrically Braced Steel Frame[J].Journal of Xi‘an University of Architecture&Technology,2000,32(1):20～23(in Chinese)
[7]赵宝成,顾强.Y型偏心支撑钢框架在循环荷载作用下的滞回性能分析[J].钢结构,2006,21(3):75～78Zhao Bao-cheng,Gu Qiang.Y-eccentrically Braced Steel Frame Energy Dissipation under Cyclic Load[J].Steel Construction,2006,21(3):75～78(in Chinese)
[8]于安林,赵宝成,李仁达,沈淼.耗能段腹板高厚比对Y型偏心支撑钢框架滞回性能影响的试验研究[J].地震工程与工程振动,2009,29(6):143～148Yu An-lin,Zhao Bao-cheng,Li Ren-da,Shen Miao.Experimental Study on Effect of Link Beam Web Depththickness Ratio on Energy-dissipation of Y-shaped Eccentrically Braced Steel Frames[J].Journal of Earhthquake Engineering Vibration,2009,29(6):143～148(in Chinese)(上接第23页)
[9]杨禹丞,于安林,赵宝成.循环荷载作用下RC框架内填Y型钢支撑的试验研究[J].苏州科技学院学报(工程技术版),2010,23(2):41～45Yang Yu-cheng,Yu An-lin,Zhao Bao-cheng.Experimental Study on Reinforced Concrete Frames with Y-eccentrically Brace under Cyclic Loading[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(2):41～45.(in Chinese)
[10]何绪杰,于安林,方有珍.RC框架内填Y型偏心钢支撑的有限元分析[J].苏州科技学院学报(工程技术版),2010,23(1):34～39He Xu-jie,Yu An-lin,Fang You-zhen.Finite Element Analysis of RC Frames with Y-eccentrically Brace[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(1):34～39(in Chinese)
[11]盛邵山.耗能梁段与RC框架梁连接节点的滞回性能研究[D].苏州:苏州科技学院,2012Sheng Shao-shan.Hysteretic Behavior of the Connection between RC Frame Beam and Energy Dissipation Link[D].Suzhou:Suzhou University of Science and Technology,2012(in Chinese)
[12]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006Wang Jin-chang,Chen Ye-kai.Application of ABAQUS in Civil Engineering[M].Hangzhou:Zhejiang University Press,2006(in Chinese)
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