高强钢组合K形偏心支撑钢框架抗震性能混合试验
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摘要
为进一步研究混合试验方法的有效性以及高强钢组合K形偏心支撑钢框架的抗震性能,建立了一套基于OpenFresco试验平台的混合试验系统,进行了一个1∶2缩尺的3层高强钢组合K形偏心支撑钢框架结构模型的混合试验。首先通过小工况的预加载研究试验系统的有效性,分析了试验子结构的位移加载精度,作动器加载时差。然后对试件进行正式的混合试验加载,分析了高强钢组合K形偏心支撑钢框架结构在不同工况下的自振频率、位移反应、水平地震作用、滞回性能以及关键部位应变。结果表明:作动器加载位移峰值与计算位移峰值比较接近,最大相对误差为13.60%,各工况下作动器平均每步的加载时差保持在20 ms左右;随着地震波加速度峰值的增大,模型的自振频率下降,刚度出现了一定的退化。各层的变形主要产生在消能梁段的腹板处,以剪切变形为主。模型结构在多遇地震和罕遇地震作用下的最大层间侧移角分别为1/1068和1/197,符合抗震设计规范对层间侧移角限值。综上,基于OpenFresco试验平台的混合试验系统能够较好的反应结构的地震响应,高强钢组合K形偏心支撑钢框架结构具有良好的抗震性能。
A loading system of hybrid testing based on OpenFresco was established to study the effectiveness of the system. A hybrid test of a 1/2 scaled three-story high strength steel composite K-eccentrically braced steel frame(K-HSS-EBF) was conducted to investigate the seismic performance of the structure model. The effectiveness of the test system is studied by preloading the specimen under small load conditions. The displacement loading precision of the experimental substructure and the loading time difference of the actuators are analyzed. The natural frequency, displacement response, horizontal seismic force, hysteretic behavior and the strain of key parts were obtained from the hybrid test. The results show that the peak displacement of the actuator is close to the calculated peak displacement. The maximum relative error is 13.60% and the average loading time difference of the actuator was kept at approximately 20 ms under different conditions. With the increase of the seismic peak acceleration, the natural frequency decreases and the stiffness of the structure degrades slightly. The deformation of each story is mainly in the web of the energy dissipation beam, which is mainly shear deformation.The maximum inter-story drift of the model structure under the frequent and rare earthquakes are 1/1068 and1/197, respectively, which meet the inter-story drift limit in the seismic design code for buildings. In conclusion,the hybrid test system based on OpenFresco can better respond to the seismic response of the structure and the K-HSS-EBFs have good seismic performance.
A loading system of hybrid testing based on OpenFresco was established to study the effectiveness of the system. A hybrid test of a 1/2 scaled three-story high strength steel composite K-eccentrically braced steel frame(K-HSS-EBF) was conducted to investigate the seismic performance of the structure model. The effectiveness of the test system is studied by preloading the specimen under small load conditions. The displacement loading precision of the experimental substructure and the loading time difference of the actuators are analyzed. The natural frequency, displacement response, horizontal seismic force, hysteretic behavior and the strain of key parts were obtained from the hybrid test. The results show that the peak displacement of the actuator is close to the calculated peak displacement. The maximum relative error is 13.60% and the average loading time difference of the actuator was kept at approximately 20 ms under different conditions. With the increase of the seismic peak acceleration, the natural frequency decreases and the stiffness of the structure degrades slightly. The deformation of each story is mainly in the web of the energy dissipation beam, which is mainly shear deformation.The maximum inter-story drift of the model structure under the frequent and rare earthquakes are 1/1068 and1/197, respectively, which meet the inter-story drift limit in the seismic design code for buildings. In conclusion,the hybrid test system based on OpenFresco can better respond to the seismic response of the structure and the K-HSS-EBFs have good seismic performance.
引文
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[13]李慎,连鸣,苏明周.高强钢组合K形偏心支撑钢框架弹塑性状态的层剪力分布研究[J].工程力学,2016,33(12):167-175.Li Shen,Lian Ming,Su Mingzhou.Seismic shear of K-type eccentrically braced steel frames with high strength steel in elasto-plastic state[J].Engineering Mechanics,2016,33(12):167-175.(in Chinese)
[14]李慎,苏明周,连鸣.基于性能设计的高强钢组合K形偏心支撑钢框架抗震性能研究[J].建筑结构,2015,45(6):71-79.Li Shen,Lian Ming,Su Mingzhou.Seismic behavior study of K-typed eccentricially braced steel frames with high strength steel combination based on performance design method[J].Building Structure,2015,45(6):71-79.(in Chinese)
[15]GB 50011―2010(2016年版),建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011―2010(2016 edition),Code for seismic design of buildings[S].Beijing:China Architecture Industry Press,2010.(in Chinese)
[16]Schellenberg A,Kim H K,Takahashi Y,et al.Open Fresco command language manual[M].Berkeley,US:The Regents of the University of California,2009:38-39.
[2]Stojadinovic B,Mosqueda G,Mahin S A.Event-driven control system for geographically distributed hybrid simulation[J].Journal of Structural Engineering,2006,132(1):68-77.
[3]Chae Y,Ricles J M,Sause R.Large-scale real-time hybrid simulation of a three-story steel frame building with magneto-rheological dampers[J].Earthquake Engineering&Structural Dynamics,2015,43(13):1915-1933.
[4]Pan P,Tomofuji H,Wang T,et al.Development of peer-to-peer(P2P)internet online hybrid test system[J].Earthquake Engineering&Structural Dynamics,2006,35(7):867-890.
[5]郭玉荣,范云蕾,曾东,等.网络化结构实验室:桥梁结构远程拟动力试验平台开发与应用[J].工程力学,2010,27(增刊1):94-98.Guo Yurong,Fan Yunlei,Zeng Dong,et al.Networked structural laboratories:development and application of remote pseudo-dynamic testing platforms for bridge structures[J].Engineering Mechanics,2010,27(Suppl1):94-98.(in Chinese)
[6]郭珺,唐贞云,陈适才,等.试件-加载系统相互作用对实时子结构试验系统稳定性影响[J].工程力学,2016,33(11):59-67.Guo Jun,Tang Zhenyun,Chen Shicai,et al.The influence of specimen-transfer-system interaction on the stability of real-time substructuring system[J].Engineering Mechanics,2014,33(11):59-67.(in Chinese)
[7]王贞,刘进进,吴斌.实时混合试验近完全时滞补偿方法的参数确定[J].工程力学,2014,31(10):158-166.Wang Zhen,Liu Jinjin,Wu Bin.Parameter determination of near complete time delay compensation method for real time hybrid test[J].Engineering Mechanics,2014,31(10):158-166.(in Chinese)
[8]杨格,王贞,吴斌,等.建筑结构混合试验平台HyTest开发研究[J].建筑结构学报,2015,36(11):149-156.Yang Ge,Wang Zhen,Wu Bin,et al.Development of HyTest for structural hybrid simulation[J].Journal of Building Structures,2015,36(11):149-156.(in Chinese)
[9]Dubina D,Stratan A,Dinu F.Dual high-strength steel eccentrically braced frames with removable links[J].Earthquake Engineering&Structural Dynamics,2008,37(15):1703-1720
[10]段留省,苏明周,郝麒麟,等.高强钢组合K形偏心支撑钢框架抗震性能试验研究[J].建筑结构学报,2014,35(7):18-25.Duan Liusheng,Su Mingzhou,Hao Qilin,et al.Experimental study on seismic behavior of high strength steel composite K-type eccentrically braced frames.Journal of Building Structures,2014,35(7):18-25.
[11]田小红,苏明周,连鸣,等.高强钢组合K形偏心支撑框架结构振动台试验研究[J].土木工程学报,2016,49(3):56-63.Tian Xiaohong,Su Mingzhou,Lian Ming,et al.Shake table test of high-strength steel composite K-eccentrically braced frames[J].China Civil Engineering Journal,2016,49(3):56-63.(in Chinese)
[12]李慎,苏明周,连鸣,等.多层高强钢组合K形偏心支撑钢框架抗震性能研究[J].土木工程学报,2015,48(10):38-47.Li Shen,Lian Ming,Su Mingzhou,et al.Seismic behavior of multi-storey high strength steel composite K-eccentrically braced steel frame[J].China Civil Engineering Journal,2015,48(10):38-47.(in Chinese)
[13]李慎,连鸣,苏明周.高强钢组合K形偏心支撑钢框架弹塑性状态的层剪力分布研究[J].工程力学,2016,33(12):167-175.Li Shen,Lian Ming,Su Mingzhou.Seismic shear of K-type eccentrically braced steel frames with high strength steel in elasto-plastic state[J].Engineering Mechanics,2016,33(12):167-175.(in Chinese)
[14]李慎,苏明周,连鸣.基于性能设计的高强钢组合K形偏心支撑钢框架抗震性能研究[J].建筑结构,2015,45(6):71-79.Li Shen,Lian Ming,Su Mingzhou.Seismic behavior study of K-typed eccentricially braced steel frames with high strength steel combination based on performance design method[J].Building Structure,2015,45(6):71-79.(in Chinese)
[15]GB 50011―2010(2016年版),建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011―2010(2016 edition),Code for seismic design of buildings[S].Beijing:China Architecture Industry Press,2010.(in Chinese)
[16]Schellenberg A,Kim H K,Takahashi Y,et al.Open Fresco command language manual[M].Berkeley,US:The Regents of the University of California,2009:38-39.
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