T型钢半刚性连接梁柱节点抗震性能试验研究
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摘要
通过对两组T型钢连接梁柱节点的单向与循环加载试验,了解该类型节点的抗震性能以及翼缘厚度对节点抗震性能的影响,并通过IDARC程序模拟节点的受荷过程,讨论T型钢连接梁柱节点理论建模的方法。试验研究表明:T型钢梁柱连接滞回曲线饱满,连接表现出了良好的延性,极限转角均超过了欧洲规范规定的极限转角0.03rad,具有较为理想的抗震性能;T型钢翼缘越厚,节点初始刚度、承载力以及耗能能力越大;对于半刚性连接中螺栓刚度大于T型钢翼缘刚度的试件应按T型钢的极限承载力设计。程序分析表明:利用刚度均匀变化的节点板模拟T型钢的半刚性连接具有较高的模拟精度,通过调整节点板底部刚度以及屈服弯矩可以模拟不同翼缘厚的T型钢半刚性连接。
The uniaxial and cyclic loading experiments are carried out on two groups of T-stub beam-column joints specimens to obtain the seismic behavior of T-stub joints and flange thickness effects on the seismic behavior of joint.The theoretical modeling method of T-stub beam-column joints is discussed based on the loading process of joint by IDARC program simulation.The experimental results show that for T-stub beam-column joints the hysteresis loops is plump and the ductility is good.The limiting rotation angles all exceed 0.03rad regulated by Euro code.Ductility,bearing and energy dissipation capacity of the connections increase along with the increasing of T-stub flange's thickness.When the stiffness of bolt is greater than that of T-sub' flange,the ultimate bearing capacity of T-sub shall be in accordance with the bolt.IDARC analysis shows that using a gusset plate to simulate the T-stub semi-rigid connections will result in a higher accuracy.By adjusting the stiffness of gusset plate bottom and yield moment can simulate the T-stub semi-rigid connections of different flange thicknesses.
The uniaxial and cyclic loading experiments are carried out on two groups of T-stub beam-column joints specimens to obtain the seismic behavior of T-stub joints and flange thickness effects on the seismic behavior of joint.The theoretical modeling method of T-stub beam-column joints is discussed based on the loading process of joint by IDARC program simulation.The experimental results show that for T-stub beam-column joints the hysteresis loops is plump and the ductility is good.The limiting rotation angles all exceed 0.03rad regulated by Euro code.Ductility,bearing and energy dissipation capacity of the connections increase along with the increasing of T-stub flange's thickness.When the stiffness of bolt is greater than that of T-sub' flange,the ultimate bearing capacity of T-sub shall be in accordance with the bolt.IDARC analysis shows that using a gusset plate to simulate the T-stub semi-rigid connections will result in a higher accuracy.By adjusting the stiffness of gusset plate bottom and yield moment can simulate the T-stub semi-rigid connections of different flange thicknesses.
引文
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[3]王新武.H型钢梁柱T型连接的研究[C]//第二届全国现代结构工程学术研讨会论文集,2002:20-22.WANG Xinwu.Research on H-shape Steel T-type connections of beam-to-column[C]//The Second National Symposium Papers on Modern Struc-ture Engineering,2002,20-22.(in Chinese)
[4]徐凌,徐亮,高松.外伸端板螺栓连接节点的强度和刚度研究[J].地震工程与工程振动,2006,26(2):88-91.XU Ling,XU Liang,GAO Song.Research on strength and stiffness of the nodes connected with overhanging end plate[J].Journal of EarthquakeEngineering and Engineering Vibration,2006,26(2):88-91.(in Chinese)
[5]张丽娟,王新武.半刚性连接节点的类型及其受力性能[J].洛阳理工学院学报:自然科学版,2009,19(1):25-28.ZHANG Lijuan,WANG Xinwu.Mechanical behavior and types of semi-rigid connections[J].Journal of Luoyang Institute of Science and Technol-ogy:Natural Science Edition,2009,19(1):25-28.(in Chinese)
[6]彭海雁.半刚性T型钢梁柱连接在循环荷载作用的的受力性能研究[D].长沙:长沙理工大学,2010.PENG Haiyan.Study on the mechanical behaviors of semi-rigid T-stub beam-to-column connection under cyclic load[D].Changsha:Changsha U-niversity of Science&Technology,2010.(in Chinese)
[7]GB50017-2003钢结构设计规范[S].GB 50017-2003 Code for Design of Steel Structures[S].(in Chinese)
[8]戴邵斌,黄俊,朱健.钢框架T型钢连接节点的受力性能研究[J].工业建筑,2005,35(9):90-93.DAI Shaobing,HUANG Jun,ZHU Jian.Research on mechanical performance of T-joint of steel frame[J].Industrial Construction,2005,35(9):90-93.(in Chinese)
[9]Valles R E,Reinhorn A M,Kunnath S K,et al.IDARC2D Version4.0:A Computer program for the inelastic damage analysis of building[R].Re-port No.NCEER-96-0010.NationalCenter for Earthquake Engineering Research.State University of New york at Buffalo,1996.
[10]程显锋,马心俐.半刚性节点的转动刚度及其影响[J].山西建筑,2009,35(23):48-50.CHENG Xianfeng,MA Xinli.Semi-rigid joint stiffness of the rotational and it's effects[J].Shanxi Architecture,2009,35(23):48-50.(in Chi-nese)
[11]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003.ZHANG Xinpei.Reinforced concrete aseismic structure nonlinear analysis[M].Beijing:Science Press,2003.(in Chinese)
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