地震力作用角度对短肢剪力墙抗震性能的影响
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摘要
通过低周反复试验研究了加载角度对"一"字形截面钢筋混凝土短肢剪力墙抗震性能的影响,加载角度为0°,25°,45°。记录了试件由开裂、屈服到破坏的整个过程,观察到不同角度加载造成的剪力墙不同的破坏模式,可以发现,短肢墙的破坏形式由弯剪破坏到弯曲破坏变化。定量分析试件的恢复力曲线(即滞回曲线和骨架曲线)、延性、耗能能力等指标发现,随着加载角度的增大,构件的极限承载力变小,极限位移、延性、耗能能力增大。
The influence of loading angle on the seismic performance of I-shaped reinforced concrete(RC) short-leg shear wall was studied through experiments.Three RC short-leg shear walls were subjected to cyclic loads,which were applied with the angles of 0 degree,25 degree and 45 degree to the in-plane direction of shear walls,respectively.The whole process of members from cracking,rebar yielding to failure was described in this paper.It was noted that the failure pattern of short-leg shear wall was changed from shear and bending combined failures to mere bending failure.The indexes,such as hysteretic curves,ductility,and energy dissipation ability were analyzed quantificationally.With the increase of load angle,the value of peak strength dropped,while the ultimate displacement,ductility and energy dissipation ability showed an increasing trend.
The influence of loading angle on the seismic performance of I-shaped reinforced concrete(RC) short-leg shear wall was studied through experiments.Three RC short-leg shear walls were subjected to cyclic loads,which were applied with the angles of 0 degree,25 degree and 45 degree to the in-plane direction of shear walls,respectively.The whole process of members from cracking,rebar yielding to failure was described in this paper.It was noted that the failure pattern of short-leg shear wall was changed from shear and bending combined failures to mere bending failure.The indexes,such as hysteretic curves,ductility,and energy dissipation ability were analyzed quantificationally.With the increase of load angle,the value of peak strength dropped,while the ultimate displacement,ductility and energy dissipation ability showed an increasing trend.
引文
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[11]曹万林,张建伟,田宝发,等.带暗支撑低矮剪力墙抗震性能试验及承载力计算[J].土木工程学报,2004,37(3):44-53.Cao Wanlin,Zhang Jianwei,Tianbaofa,et al.Exper-??imental study on a seismatic peoperty and calculation of load-carrying capacity for low-rise RC shear walls with concealed bracings[J].China Civil Engineering Journal,2004,37(3):44-53.(in Chinese)
[12]吴敏哲,杨玉东,郭棣.T形型钢短肢剪力墙低周反复荷载试验研究[J].西安建筑科技大学学报,2009,41(4):461-466.Wu Minzhe,Yang Yudong,Cuodi.An experimental study on the behavior of steel reinforced concrete shortlimbed shear wall structure under different directional cyclic loading[J].Journal of Xi'an University of Architecture&technology,2009,41(4);461466.(in Chinese)
[13]中国建筑科学研究院.JGJ 101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.China Academy of Building Research.JGJ 101—96 Specification of testing methods for earthquake resistant building[S].Beijing;China Architecture and Building Press,1997.(in Chinese)
[14]李宏男.结构多维抗震理论[M].北京:科学出版社,2006.Li Hongnan.Theoretical analysis of structures to multiple earthquake excitations[M].Beijing;Science Press,2006.(in Chinese)
[2]Thomas N Salonikios,Andreas J.Kappos.Cyclic load behavior of low-slenderness reinforced concrete walls:design basis and test results[J],Structural Journal,July-Aug 1999:649-660.
[3]Thomas N Salonikios,Andreas J.Kappos.Cyclic load behavior of low-Slenderness reinforced concrete walls:failure modes,strength and deformation analysis,and design implications[J].Structural Journal,Jan-Feb,2000:132-142.
[4]Zhang Yunfeng,Wang Zhihao.Seismic behavior of reinforced concrete shear walls sbujected to high axial loading[J].Structural Journal,Sep-Oct 2000;739750.
[5]曹万林,张建伟,黄选明,等.带暗支撑短肢剪力墙及核心筒抗震研究与应用[J].工程力学,2005,22(9):94-106.Cao Wanlin,Zhang Jianwei,Huang Xuanming,et al.Seismic performance and engineering application of RC short-pier shear walls and core walls with concealed bracings[J].Engineering Mechanics,2005,22(9):94-106.(in Chinese)
[6]曹万林,赵长军,张建伟,等.带暗支撑短肢剪力墙结构振动台试验研究[J].建筑结构学报,2008,29(1):49-56.Cao Wanlin,Zhao Changjun,Zhang Jianwei,et al.Earthquake simulation test on short pier RC shear wall structure with concealed bracings[J].Journal of Building Structures,2008,29(1):49-56.(in Chinese)
[7]曹万林,张建伟,常卫华,等.带暗支撑双肢短肢剪力墙抗震性能试验研究[J].地震工程与工程振动,2006,26(1):64-70.Cao Wanlin,Zhang Jianwei,Chang Weihua,et al.Experiment study on seismic behavior RC coupled short-pier shear wall with concealed bracings[J].Earthquake Engineering and Engineering Vibration,2006,26(1):64-70.(in Chinese)
[8]曹万林,王丽,胡国振,等.钢筋混凝土带暗支撑Z形截面短肢剪力墙抗震性能试验研究[J].世界地震工程,2004,20(2):84-89.??Cao Wanlin,Wang Li,Hu Guozhen,et al.Experimental study on seismic performance of Z-shaped short pier RC shear wall with concealed bracings[J].World Information on Earthquake Engineering,2004,20(2):84-89.(in Chinese)
[9]黄选明,曹万林,吕西林.不同型式暗支撑短肢剪力墙抗震性能试验研究[J].地震工程与工程振动,2005,25(3).60-66.Huang Xuanming,Cao Wanlin,Lu Xilin.Experimental study on seismic behavior of short pier RC shear walls with different forms of concealed bracings[J].Earthquake Engineering and Engineering Vibration,2005,25(3):60-66.(in Chinese)
[10]曹万林,杨兴民,黄选明,等.钢筋混凝土带暗支撑一字形截面短肢剪力墙抗震性能试验研究[J].世界地震工程,2004,20(4):30-35.Cao Wanlin,Yang Xingmin,Huang Xuanming,et al.Experimental study on seismic performance of 1shaped short pier RC shear wall with concealed bracing[J].World Information on Earthquake Engineering,2004,20(4):30-35.(in Chinese)
[11]曹万林,张建伟,田宝发,等.带暗支撑低矮剪力墙抗震性能试验及承载力计算[J].土木工程学报,2004,37(3):44-53.Cao Wanlin,Zhang Jianwei,Tianbaofa,et al.Exper-??imental study on a seismatic peoperty and calculation of load-carrying capacity for low-rise RC shear walls with concealed bracings[J].China Civil Engineering Journal,2004,37(3):44-53.(in Chinese)
[12]吴敏哲,杨玉东,郭棣.T形型钢短肢剪力墙低周反复荷载试验研究[J].西安建筑科技大学学报,2009,41(4):461-466.Wu Minzhe,Yang Yudong,Cuodi.An experimental study on the behavior of steel reinforced concrete shortlimbed shear wall structure under different directional cyclic loading[J].Journal of Xi'an University of Architecture&technology,2009,41(4);461466.(in Chinese)
[13]中国建筑科学研究院.JGJ 101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.China Academy of Building Research.JGJ 101—96 Specification of testing methods for earthquake resistant building[S].Beijing;China Architecture and Building Press,1997.(in Chinese)
[14]李宏男.结构多维抗震理论[M].北京:科学出版社,2006.Li Hongnan.Theoretical analysis of structures to multiple earthquake excitations[M].Beijing;Science Press,2006.(in Chinese)