三层预压装配式预应力混凝土框架抗震性能试验研究
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摘要
通过对一榀三层预压装配式混凝土框架的拟静力试验,了解框架承载力和破坏模式,得到框架位移滞回曲线、梁端转角滞回曲线,研究预压装配式混凝土框架的破坏机制、刚度退化、滞回性能、耗能能力、梁端转角延性等抗震性能。研究结果表明:在低周反复荷载作用下,框架梁端率先出现塑性铰,梁端截面转角延性系数在3.64至5.62之间;节点在柱轴向压力和水平预应力的共同作用下,核心区处于双向受压状态,节点的抗裂性能、框架整体抗侧刚度和变形恢复能力较好;加载至框架层间位移角为1/42～1/67时,框架承载能力没有出现明显下降,预压装配式框架属"强柱弱梁"型结构。
Based on the pseudo static experimental study of a specimen of three story post-tensioned precast concrete frame,this paper investigated the load-bearing capacity and the failure mode of frame,the story shear-displacement hysteresis curve of frame and the moment-rotation hysteresis curves at both ends of the beams.The research included the seismic performance of failure mechanism,rigidity degradation,hysteretic behavior,rotation ductility and etc.The results indicate that the plastic hinges first appear at the ends of beam at lower stories and the rotation ductility coefficient is between 3.64 and 5.62 with good ductility.The connections are under bi-directional compression caused by column axial pressure and horizontal prestressing stress.The cracking resistance of the connection,the frame lateral stiffness and deformation recovery can be improved greatly compared with those of ordinary frames.The load carrying capacity of frame can be sustained without serious degradation at story drifts between 1/42 and 1/67.The post-tensioned prestressed precast concrete frame is a 'strong column weak beam' structure.
Based on the pseudo static experimental study of a specimen of three story post-tensioned precast concrete frame,this paper investigated the load-bearing capacity and the failure mode of frame,the story shear-displacement hysteresis curve of frame and the moment-rotation hysteresis curves at both ends of the beams.The research included the seismic performance of failure mechanism,rigidity degradation,hysteretic behavior,rotation ductility and etc.The results indicate that the plastic hinges first appear at the ends of beam at lower stories and the rotation ductility coefficient is between 3.64 and 5.62 with good ductility.The connections are under bi-directional compression caused by column axial pressure and horizontal prestressing stress.The cracking resistance of the connection,the frame lateral stiffness and deformation recovery can be improved greatly compared with those of ordinary frames.The load carrying capacity of frame can be sustained without serious degradation at story drifts between 1/42 and 1/67.The post-tensioned prestressed precast concrete frame is a 'strong column weak beam' structure.
引文
[1]范力,吕西林,赵斌.预制混凝土框架结构抗震性能研究综述[J].结构工程师,2007,23(4):90-97.(FAN Li,LU Xilin,ZHAO Bin.Summary ofinvestigation on seismic behavior of precast concreteframe structures[J].Structural Engineers,2007,23(4):90-97.(in Chinese))
[2]种迅,孟少平,潘其健,等.部分无黏结预制预应力混凝土框架及其节点抗震能力研究[J].地震工程与工程振动2,007,27(4):55-60.(CHONG Xun,MENGShaoping,PAN Qijian,et al.Research on seismicbehavior of partially unbonded precast prestressedconcrete frames and beam-column subassemblies[J].Journal of Earthquake Engineering and StructuralDynamics,2007,27(4):55-60.(in Chinese))
[3]Kaya M,Arslan A.Analytical modeling of post-tensioned precast beam-to-column connections[J].Materials and Design,2009,30(9):3802-3811.
[4]柳炳康,田井锋,张瑜中,等.低周反复荷载下预压装配式PC框架延性性能和耗能能力[J].建筑结构学报,2007,28(3):74-81.(LIU Bingkang,TIANJingfeng,ZHANG Yuzhong,et al.Behavior of ductilityand energy dissipation of prestressed fabricated PCframe under low-cyclic reversed loading[J].Journal ofBuilding Structures,2007,28(3):74-81.(in Chinese))
[5]柳炳康,宋满荣,蒋亚琼,等.预制预应力混凝土装配整体式框架抗震性能试验研究[J].建筑结构学报,2011,32(2):24-32.(LIU Bingkang,SONGManrong,JIANG Yaqiong,et al.Experimental studyon seismic performance of post-tensioned precastprestressed concrete frame[J].Journal of BuildingStructures,2011,32(2):24-32.(in Chinese))
[6]JGJ 101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ 101—1996Specification of testing methods for earthquake resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997.(in Chinese))
[7]赵国藩主编.高等钢筋混凝土结构学[M].北京:机械工业出版社,2005:380-413.
[2]种迅,孟少平,潘其健,等.部分无黏结预制预应力混凝土框架及其节点抗震能力研究[J].地震工程与工程振动2,007,27(4):55-60.(CHONG Xun,MENGShaoping,PAN Qijian,et al.Research on seismicbehavior of partially unbonded precast prestressedconcrete frames and beam-column subassemblies[J].Journal of Earthquake Engineering and StructuralDynamics,2007,27(4):55-60.(in Chinese))
[3]Kaya M,Arslan A.Analytical modeling of post-tensioned precast beam-to-column connections[J].Materials and Design,2009,30(9):3802-3811.
[4]柳炳康,田井锋,张瑜中,等.低周反复荷载下预压装配式PC框架延性性能和耗能能力[J].建筑结构学报,2007,28(3):74-81.(LIU Bingkang,TIANJingfeng,ZHANG Yuzhong,et al.Behavior of ductilityand energy dissipation of prestressed fabricated PCframe under low-cyclic reversed loading[J].Journal ofBuilding Structures,2007,28(3):74-81.(in Chinese))
[5]柳炳康,宋满荣,蒋亚琼,等.预制预应力混凝土装配整体式框架抗震性能试验研究[J].建筑结构学报,2011,32(2):24-32.(LIU Bingkang,SONGManrong,JIANG Yaqiong,et al.Experimental studyon seismic performance of post-tensioned precastprestressed concrete frame[J].Journal of BuildingStructures,2011,32(2):24-32.(in Chinese))
[6]JGJ 101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ 101—1996Specification of testing methods for earthquake resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997.(in Chinese))
[7]赵国藩主编.高等钢筋混凝土结构学[M].北京:机械工业出版社,2005:380-413.
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