Y形偏心钢支撑RC框架结构滞回性能试验研究
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摘要
为了研究耗能段与RC框架梁采用不同连接节点形式对Y形偏心钢支撑RC框架结构滞回性能的影响,进行了2榀1/3缩尺Y形偏心钢支撑RC框架的低周反复荷载试验。介绍了试验过程,分析了试件在循环荷载作用下的破坏机理、滞回性能、延性、刚度退化规律以及耗能能力。试验结果表明:应用Y形偏心钢支撑加固RC框架合理可行,Y形偏心钢支撑承担了结构80%以上的水平荷载;U型外包钢与框架横梁连接的试件连接节点承载能力较高,耗能段耗能充分,结构的滞回曲线饱满;钢板与框架横梁底部连接的试件滞回曲线捏缩,耗能段耗能不充分,结构整体耗能能力差;U形外包钢与框架横梁连接的试件,耗能段破坏导致结构失效;钢板与框架梁底部连接的试件,连接节点破坏导致结构失效。
In order to research the energy-dissipation of Y-eccentrically steel braced RC frames of different connected nodes between link and RC frame beam,the one-bay two-story test specimens at one-third scale were carried out under low reversed cyclic loading.Process of test was introduced.Failure mechanism,hysteretic behavior,ductility,rigidity degeneration and energy-dissipation of specimens were analysed.Experimental studies and analysis show that Y-eccentrically steel brace reinforced RC frame is rational and feasible,and 80% of the lateral load was carried by Link.Frame beams and link connected node have higher bearing capacity,when the U shaped steel connect frame beams and the specimen of the hysteresis curve are full.The specimen has poor energy consumption capacity,when the steel slab connects the bottom of frame beams and the hysteresis of specimen curve demonstrate pinch phenomenon.If U shaped steel connects frame beams,the link failure would cause the structure failure.If Steel slab connects the bottom of frame beams,the failure of connection would cause the failure of the structure.
In order to research the energy-dissipation of Y-eccentrically steel braced RC frames of different connected nodes between link and RC frame beam,the one-bay two-story test specimens at one-third scale were carried out under low reversed cyclic loading.Process of test was introduced.Failure mechanism,hysteretic behavior,ductility,rigidity degeneration and energy-dissipation of specimens were analysed.Experimental studies and analysis show that Y-eccentrically steel brace reinforced RC frame is rational and feasible,and 80% of the lateral load was carried by Link.Frame beams and link connected node have higher bearing capacity,when the U shaped steel connect frame beams and the specimen of the hysteresis curve are full.The specimen has poor energy consumption capacity,when the steel slab connects the bottom of frame beams and the hysteresis of specimen curve demonstrate pinch phenomenon.If U shaped steel connects frame beams,the link failure would cause the structure failure.If Steel slab connects the bottom of frame beams,the failure of connection would cause the failure of the structure.
引文
[1]Bush T D,Jones E A,Jirsa J O.Behavior of RC frame strengthened using structural steel bracing[J].Journal of Structural Engineering,1991,117(4):1115-1126.
[2]Maheri M R.Use of steel bracing in reinforced concrete frames[J].Engineering Structures,1997,19(12):1018-1024.
[3]Maheri M R,Kousari R,Razazan M.Pushover tests on steel X-braced and Knee-braced RC frames[J].Engineering Structures,2003,25(7):1697-1705.
[4]Youssef M A,Ghaffarzadeh H,Nehdi.M.Seismic performance of RC frames with concentric internal steel bracing[J].Engineering Structures,2007,29(8):1561-1568.
[5]于安林,赵宝成,李仁达,等.耗能梁段腹板高厚比影响Y型偏心支撑钢框架滞回性能的试验研究[J].地震工程与工程振动,2009,29(6):143-148.YU Anlin,ZHAO Baocheng,LI Renda,et al.Experimental investigation of link beam web depth-thickness ratio effect on Y-eccentrically bracedsteel frames[J].Journal of Earthquake Engineeringand Engineering Vibration,2009,29(6):143-148.(in Chinese)
[6]郭兵,刘国鹏,徐超,等.偏心支撑半刚接钢框架的动力特性及抗震性能试验研究[J].建筑结构学报,2011,32(10):90-96.GUO Bing,LIU Guopeng,XU Chao,et al.Experimental study on dynamic characteristics and seismic performance of semi-rigid steel frame with ec-centric brace[J].Journal of Building Structures,2011,32(10):90-96.(in Chinese)
[7]石永久,熊俊,王元清,等.多层钢框架偏心支撑的抗震性能试验研究[J].建筑结构学报,2010,31(2):29-34.SHI Yongjiu,XIONG Jun,WANG Yuanqing,et al.Experimental studies on seismic performance of multi-storey steel frame with eccentricbrace[J].Journal of Building Structures,2010,31(2):29-34.(in Chinese)
[8]Ghobarah A,Habou Elfath.Rehabilitation of reinforced concrete frame using eccentric steel bracing[J].Engineering Structures,2001,23(9):745-755.
[9]Gonzalez Sola Luis.Retrofitting of RC structures on ravity columns using inverted-Y steel bracing[D].M.S.,University of Puerto Rico,Mayaguez(Puerto Rico),2007.
[10]GB/T50081-2002普通混凝土力学性能试验方法标准[S].GB/T 50081-2002 Standard for Test Method of Mechanical Properties on Ordinary Concrete[S].(in Chinese)
[11]GB/T228-2002金属材料室温拉伸试验方法[S].GB/T 228-2002 Metallic materials—Tensile Testing at Ambient Temperature[S].(in Chinese)
[12]GB/T2975-1998钢及钢产品力学性能试验取样位置及试样制备[S].GB/T 2975-1998Steel and Steel Products-Location and Preparation of Test Pieces for Mechanical Testing[S].(in Chinese)
[2]Maheri M R.Use of steel bracing in reinforced concrete frames[J].Engineering Structures,1997,19(12):1018-1024.
[3]Maheri M R,Kousari R,Razazan M.Pushover tests on steel X-braced and Knee-braced RC frames[J].Engineering Structures,2003,25(7):1697-1705.
[4]Youssef M A,Ghaffarzadeh H,Nehdi.M.Seismic performance of RC frames with concentric internal steel bracing[J].Engineering Structures,2007,29(8):1561-1568.
[5]于安林,赵宝成,李仁达,等.耗能梁段腹板高厚比影响Y型偏心支撑钢框架滞回性能的试验研究[J].地震工程与工程振动,2009,29(6):143-148.YU Anlin,ZHAO Baocheng,LI Renda,et al.Experimental investigation of link beam web depth-thickness ratio effect on Y-eccentrically bracedsteel frames[J].Journal of Earthquake Engineeringand Engineering Vibration,2009,29(6):143-148.(in Chinese)
[6]郭兵,刘国鹏,徐超,等.偏心支撑半刚接钢框架的动力特性及抗震性能试验研究[J].建筑结构学报,2011,32(10):90-96.GUO Bing,LIU Guopeng,XU Chao,et al.Experimental study on dynamic characteristics and seismic performance of semi-rigid steel frame with ec-centric brace[J].Journal of Building Structures,2011,32(10):90-96.(in Chinese)
[7]石永久,熊俊,王元清,等.多层钢框架偏心支撑的抗震性能试验研究[J].建筑结构学报,2010,31(2):29-34.SHI Yongjiu,XIONG Jun,WANG Yuanqing,et al.Experimental studies on seismic performance of multi-storey steel frame with eccentricbrace[J].Journal of Building Structures,2010,31(2):29-34.(in Chinese)
[8]Ghobarah A,Habou Elfath.Rehabilitation of reinforced concrete frame using eccentric steel bracing[J].Engineering Structures,2001,23(9):745-755.
[9]Gonzalez Sola Luis.Retrofitting of RC structures on ravity columns using inverted-Y steel bracing[D].M.S.,University of Puerto Rico,Mayaguez(Puerto Rico),2007.
[10]GB/T50081-2002普通混凝土力学性能试验方法标准[S].GB/T 50081-2002 Standard for Test Method of Mechanical Properties on Ordinary Concrete[S].(in Chinese)
[11]GB/T228-2002金属材料室温拉伸试验方法[S].GB/T 228-2002 Metallic materials—Tensile Testing at Ambient Temperature[S].(in Chinese)
[12]GB/T2975-1998钢及钢产品力学性能试验取样位置及试样制备[S].GB/T 2975-1998Steel and Steel Products-Location and Preparation of Test Pieces for Mechanical Testing[S].(in Chinese)
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