新型预制装配混凝土框架梁柱节点耗能能力分析
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摘要
为综合研究一种非对称配筋的新型装配式框架节点的耗能能力,采用OPENSEES对1个新型预制节点(PC)及一个现浇(XJ)的抗震性能开展了低周反复数值模拟计算,由于新型节点预制梁采用非对称配筋,从滞回曲线和骨架曲线均可看出在反复荷载作用下其反应特性明显区别于普通钢筋混凝土构件特性。为了深入了解新型节点的耗能能力,分别对试件向上和向下加载的单调滞回耗能能力进行了计算分析,并比较了各个试件的等效粘结阻尼系数。结果表明,在加载前期,新型节点的耗能能力弱于现浇节点,但是待荷载施加到接近极限荷载时,现浇节点滞回曲线开始出现捏缩,等效黏滞阻尼系数下降,而新型节点黏滞阻尼系数在不断增大,说明新型节点有着较大的安全储备。
In order to comprehensively study the energy consumption of a new type of precast frame joint with asymmetric reinforcement,a low-cycle repeated numerical simulation calculation for the seismic performance of a new precast( PC) and a cast-in-place( XJ)joint is carried out by using OPENSEES. Because the new type of precast beam adopts asymmetric reinforcement,it can be seen from the hysteresis curve and the skeleton curve that the reaction characteristics are obviously different from those of ordinary reinforced concrete component. In order to understand the energy consumption of the new joint,the monotonic hysteretic energy dissipation capacity of the specimen is calculated,and the equivalent damping coefficient of each specimens are compared. The results show that the energy dissipation capacity of the new joint is weaker than the cast-in-place joint in the early loading,but when the load is applied close to the ultimate load,the hysteresis curve of the cast-in-place joint begins to shrink,while the viscous damping coefficient of the new type joint is increasing which shows that the new joint has a large security reserve.
In order to comprehensively study the energy consumption of a new type of precast frame joint with asymmetric reinforcement,a low-cycle repeated numerical simulation calculation for the seismic performance of a new precast( PC) and a cast-in-place( XJ)joint is carried out by using OPENSEES. Because the new type of precast beam adopts asymmetric reinforcement,it can be seen from the hysteresis curve and the skeleton curve that the reaction characteristics are obviously different from those of ordinary reinforced concrete component. In order to understand the energy consumption of the new joint,the monotonic hysteretic energy dissipation capacity of the specimen is calculated,and the equivalent damping coefficient of each specimens are compared. The results show that the energy dissipation capacity of the new joint is weaker than the cast-in-place joint in the early loading,but when the load is applied close to the ultimate load,the hysteresis curve of the cast-in-place joint begins to shrink,while the viscous damping coefficient of the new type joint is increasing which shows that the new joint has a large security reserve.
引文
[1] Alcocer S M,Carranza R,Perez-Navaratte D. Seismic tests of beam to column connections in a precast concrete frame[J]. PCI Journal,2002,47(3):70-89
[2] Nigel Priestley M J. Preliminary results and conclusions from the PRESSS five-story precast concrete test building[J]. PCI Journal,1999,44(6),42-54
[3] Sudhakar A. Kulkarni,Bing Li,Woon Kwong Yip,Finite element analysis of precast hybrid-steel concrete connections under cyclic loading[J]. Journal of Constructional Steel Research,2008,64(2),190-201
[4] Priestley M, Tao J. Seismic response of precast prestressed concrete frames with partially debonded tendons[J]. PCI Journal,1993 38(1),58-67
[5] Loo Y C,Yao B Z. Static and repeated load tests on precast concrete beam-to-column connections[J]. PCI Journal,1995,(2):106-115
[6] Alcocer S M,Carranza R,et al. Seismic tests of beamto-column connections in a precast concrete frame[J].PCI Journal,2002,47(3):70-89
[7] Dennis Lam. Khoo H,Li B,Yip K. Tests on precast concrete frames with connections constructed away from column faces[J]. ACI Structural Journal,2006(10)18-27.
[8]于建兵,郭正兴,管东芝.新型预制装配混凝土梁柱节点抗震性能研究[J].湖南大学学报(自然科学版),2015,42(7):42-47Yu Jian-bing, Guo Zheng-xing, Guan Dong-zhi.Research on seismic behavior of a new style precast concrete beam to column connection(Natural Science)[J]. Journal of Hunan University,2015,42(7):42-47(in Chinese)
[9]朱张峰,郭正兴.预制装配式剪力墙结构节点抗震性能试验研究[J].土木工程学报,2012,45(1):69-76Zhu Zhang-feng, Guo Zheng-xing. Seismic test and analysis of joints of new precast concrete shear wall structure[J]. China Civil Engineering Journal,2012,45(1):69-76(in Chinese)
[10]管东芝,郭正兴,于建兵,杨森.钢绞线锚入式预制砼框架节点构造及试验[J].浙江大学学报(工学版),2016,50(2):282-291Guan Dong-zhi,Guo Zheng-xing,Yu Jian-bing,Yang Sen. Structural measures and experimental study of precast concrete joints of anchored prestressing strands in frames[J].Journal of Zhejian University(Engineering Science),2016,50(2):282-291(in Chinese)
[11]肖全东,郭正兴.预制混凝土双板剪力墙的耗能能力[J].湖南大学学报(自然科学版),2014,41(9):35-41Xiao Quan-dong,Guo Zheng-xing. Energy double-wall precast concrete shear walls[J]. Journal of Hunan University(Natural Science),2014,41(9):35-41(in Chinese)
[12] GB 50011-2010,建筑抗震设计规范[S]GB 50011-2010,Code for seismic design of buildings[S](in Chinese)
[13] JGJ 101-96,建筑抗震动试验方法规程[S]JGJ 101-96, Regulation for seismic test method of building[S](in Chinese)
[2] Nigel Priestley M J. Preliminary results and conclusions from the PRESSS five-story precast concrete test building[J]. PCI Journal,1999,44(6),42-54
[3] Sudhakar A. Kulkarni,Bing Li,Woon Kwong Yip,Finite element analysis of precast hybrid-steel concrete connections under cyclic loading[J]. Journal of Constructional Steel Research,2008,64(2),190-201
[4] Priestley M, Tao J. Seismic response of precast prestressed concrete frames with partially debonded tendons[J]. PCI Journal,1993 38(1),58-67
[5] Loo Y C,Yao B Z. Static and repeated load tests on precast concrete beam-to-column connections[J]. PCI Journal,1995,(2):106-115
[6] Alcocer S M,Carranza R,et al. Seismic tests of beamto-column connections in a precast concrete frame[J].PCI Journal,2002,47(3):70-89
[7] Dennis Lam. Khoo H,Li B,Yip K. Tests on precast concrete frames with connections constructed away from column faces[J]. ACI Structural Journal,2006(10)18-27.
[8]于建兵,郭正兴,管东芝.新型预制装配混凝土梁柱节点抗震性能研究[J].湖南大学学报(自然科学版),2015,42(7):42-47Yu Jian-bing, Guo Zheng-xing, Guan Dong-zhi.Research on seismic behavior of a new style precast concrete beam to column connection(Natural Science)[J]. Journal of Hunan University,2015,42(7):42-47(in Chinese)
[9]朱张峰,郭正兴.预制装配式剪力墙结构节点抗震性能试验研究[J].土木工程学报,2012,45(1):69-76Zhu Zhang-feng, Guo Zheng-xing. Seismic test and analysis of joints of new precast concrete shear wall structure[J]. China Civil Engineering Journal,2012,45(1):69-76(in Chinese)
[10]管东芝,郭正兴,于建兵,杨森.钢绞线锚入式预制砼框架节点构造及试验[J].浙江大学学报(工学版),2016,50(2):282-291Guan Dong-zhi,Guo Zheng-xing,Yu Jian-bing,Yang Sen. Structural measures and experimental study of precast concrete joints of anchored prestressing strands in frames[J].Journal of Zhejian University(Engineering Science),2016,50(2):282-291(in Chinese)
[11]肖全东,郭正兴.预制混凝土双板剪力墙的耗能能力[J].湖南大学学报(自然科学版),2014,41(9):35-41Xiao Quan-dong,Guo Zheng-xing. Energy double-wall precast concrete shear walls[J]. Journal of Hunan University(Natural Science),2014,41(9):35-41(in Chinese)
[12] GB 50011-2010,建筑抗震设计规范[S]GB 50011-2010,Code for seismic design of buildings[S](in Chinese)
[13] JGJ 101-96,建筑抗震动试验方法规程[S]JGJ 101-96, Regulation for seismic test method of building[S](in Chinese)