预制预应力混凝土装配整体式框架抗震性能试验研究
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摘要
对一榀二跨二层预应力装配式混凝土框架进行了拟动力和拟静力试验,采用不同加速度峰值的El Centro地震波激励加载,并以拟动力试验的屈服位移为加载起点施加低周反复荷载,得到了不同加载工况下框架时程曲线、恢复力-位移滞回曲线。研究了预应力混凝土装配整体式框架的破坏机制、变形性能、刚度退化及耗能能力等抗震性能。研究结果表明:试验框架梁端率先出现塑性铰,节点核心区有着较强的刚性,提高了框架整体抗侧刚度,在层间位移角达到1/42时,框架梁、柱未产生较严重破坏。采用分析程序DRAIN-2DX对模型结构进行弹塑性动力分析,有限元计算位移值略小于实测位移值。
Pseudo-dynamic and pseudo-static test were conducted on tow storey double-span post-tensioned precast prestressed concrete model frame.The frame was first subjected different peak acceleration based on the El Centro ground motion,and then subjected to cyclic loading at starting point of yield displacement.The displacement-history curves and hysteresis curves of restoring force-displacement of experiment under different load condition were recorded and analyzed.The main parameters investigated were the failure mechanism,deformation properties,rigidity degradation and energy dissipation capacity of the frame under seismic action.The results indicate that the plastic hinge first appeared at the end of beam and post-tensioned prestressed beam have strong deformation recovery capabilities.The connections of frame on bi-direction compression enhanced joint stiffness to improve the frame lateral rigidity.The beam and column do not result in more serious damage at story drifts of 1/42.The results obtained from analysis using DRAIN-2DX are compared with the test results,indicating that the displacement of the analytical models is lower than that of the test structure.
Pseudo-dynamic and pseudo-static test were conducted on tow storey double-span post-tensioned precast prestressed concrete model frame.The frame was first subjected different peak acceleration based on the El Centro ground motion,and then subjected to cyclic loading at starting point of yield displacement.The displacement-history curves and hysteresis curves of restoring force-displacement of experiment under different load condition were recorded and analyzed.The main parameters investigated were the failure mechanism,deformation properties,rigidity degradation and energy dissipation capacity of the frame under seismic action.The results indicate that the plastic hinge first appeared at the end of beam and post-tensioned prestressed beam have strong deformation recovery capabilities.The connections of frame on bi-direction compression enhanced joint stiffness to improve the frame lateral rigidity.The beam and column do not result in more serious damage at story drifts of 1/42.The results obtained from analysis using DRAIN-2DX are compared with the test results,indicating that the displacement of the analytical models is lower than that of the test 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))
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[3]Brian G Morgen,Yahya C Kurama.Seismic design offriction-damped precast concrete frame structures[J].Journal of Structural Engineering,ASCE,2007,133(11):1501-1511.
[4]Brad D Weldon,Yahya C Kurama.Coupling of concretewalls using post-tensioned precast concrete beams[DB/OL].[2006-10-01].http://www.ascelibrary.org
[5]张瑜中,藤本一郎.PCプレストレストコンクりトのPC压着工法システムにょる二次应力と歪みにっぃての研究[C]//日本建築学会大会学術講演梗概集.东京:日本建築学会,1995.
[6]Kaya M,Arslan A.Analytical modeling of post-tensioned precast beam-to-column connections[J].Materials and Design,2009(30):3802-3811.
[7]柳炳康,张瑜中,晋哲锋,等.预压装配式预应力混凝土框架接合部抗震性能试验研究[J].建筑结构学报,2005,26(2):60-65.(LIU Bingkang,ZHANGYuzhong,JIN Zhefeng,et al.Experimental study onseismic behavior of prestressed fabricated PC frameconnections[J].Journal of Building Structures,2005,26(2):60-65.(in Chinese))
[8]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.(inChinese))
[9]JGJ 101—96建筑抗震试验方法规程[S].(JGJ101—96 Specification of testing methods forearthquake resistant building[S].(in Chinese))
[10]吕西林,范力,赵斌.装配式预制混凝土框架结构缩尺模型拟动力试验研究[J].建筑结构学报,2008,29(1):58-65.(LU Xilin,FAN Li,ZHAO Bin.Pseudodynamic test on a reduced scale jointed precastconcrete frame structure[J].Journal of BuildingStructures,2008,29(1):58-65.(in Chinese))
[11]程浩德,房贞政.有粘结预应力混凝土和无粘结预应力混凝土扁梁框架拟动力试验研究和有限元分析[J].福州大学学报:自然科学版,2008,36(6):850-856.(CHENG Haode,FANG Zhenzheng.Pseudo-dynamic experiment study and finite element analysis onbonded prestressed concrete flat beam frame andunbonded prestressed concrete flat beam frame[J].Journal of Fuzhou University:Natural Science,2008,36(6):850-856.(in Chinese))
[12]GB 50011—2008建筑抗震设计规范[S].(GB50011—2008 Code for seismic design of buildings[S].(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,2007,27(4):56-60.(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):56-60.(in Chinese))
[3]Brian G Morgen,Yahya C Kurama.Seismic design offriction-damped precast concrete frame structures[J].Journal of Structural Engineering,ASCE,2007,133(11):1501-1511.
[4]Brad D Weldon,Yahya C Kurama.Coupling of concretewalls using post-tensioned precast concrete beams[DB/OL].[2006-10-01].http://www.ascelibrary.org
[5]张瑜中,藤本一郎.PCプレストレストコンクりトのPC压着工法システムにょる二次应力と歪みにっぃての研究[C]//日本建築学会大会学術講演梗概集.东京:日本建築学会,1995.
[6]Kaya M,Arslan A.Analytical modeling of post-tensioned precast beam-to-column connections[J].Materials and Design,2009(30):3802-3811.
[7]柳炳康,张瑜中,晋哲锋,等.预压装配式预应力混凝土框架接合部抗震性能试验研究[J].建筑结构学报,2005,26(2):60-65.(LIU Bingkang,ZHANGYuzhong,JIN Zhefeng,et al.Experimental study onseismic behavior of prestressed fabricated PC frameconnections[J].Journal of Building Structures,2005,26(2):60-65.(in Chinese))
[8]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.(inChinese))
[9]JGJ 101—96建筑抗震试验方法规程[S].(JGJ101—96 Specification of testing methods forearthquake resistant building[S].(in Chinese))
[10]吕西林,范力,赵斌.装配式预制混凝土框架结构缩尺模型拟动力试验研究[J].建筑结构学报,2008,29(1):58-65.(LU Xilin,FAN Li,ZHAO Bin.Pseudodynamic test on a reduced scale jointed precastconcrete frame structure[J].Journal of BuildingStructures,2008,29(1):58-65.(in Chinese))
[11]程浩德,房贞政.有粘结预应力混凝土和无粘结预应力混凝土扁梁框架拟动力试验研究和有限元分析[J].福州大学学报:自然科学版,2008,36(6):850-856.(CHENG Haode,FANG Zhenzheng.Pseudo-dynamic experiment study and finite element analysis onbonded prestressed concrete flat beam frame andunbonded prestressed concrete flat beam frame[J].Journal of Fuzhou University:Natural Science,2008,36(6):850-856.(in Chinese))
[12]GB 50011—2008建筑抗震设计规范[S].(GB50011—2008 Code for seismic design of buildings[S].(in Chinese))
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