中厚壁冷弯型钢外伸端板连接节点抗震性能数值研究  

Numerical Study on Earthquake Resistance Behavior of Medium Thick-walled Cold-formed Steel Extended-end-plate Joint

作　　者：刘记雄[1] 戴绍斌[2] 黄俊[1,2] 彭忠[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]武汉理工大设计研究院,武汉430070

出　　处：《武汉理工大学学报》2013年第12期114-119,共6页Journal of Wuhan University of Technology

基　　金：湖北省自然科学基金(2012FFB05112);中央高校基本科研业务费专项资金(2013-ZY-065)

摘　　要：设计了3个中厚壁冷弯型钢外伸端板连接节点试件,并在低周往复荷载作用下对节点抗震性能进行了ABAQUS非线性有限元分析。结果表明,3个试件破坏特征基本一致,节点破坏源于外伸端板局部外鼓及节点区钢梁翼缘屈曲;各试件滞回曲线饱满呈纺锤形,延性系数均大于5.1,等效粘滞阻尼系数均大于0.279,节点具有较好耗能能力;试件割线刚度变化规律较为相似,刚度退化明显;相较于外伸端板厚度,高强螺栓直径对节点承载力和初始刚度影响更为显著;螺栓直径增大,节点延性、耗能性能显著增强,但增加端板厚度无明显影响。3 medium thick-walled cold-formed steel extended-end-plate joints were designed. The ABAQUS nontinear finite element analysis on earthquake resistance Behaviors of the joints were conducted under low cyclic loading. The re-suits indicate that the fallure processes and failure modes of 3 specimens are basically the same, the destruction of joints derives from bulging of the extended-end-plate and buckling of the steel beam flanges; the shapes of hysteresis curves of all specimens are full and present spindle, the displacement ductility factors are more than 5.1, the equivalent damping fac-tors are more than 0. 279, all the specimens possess good energy dissipation capacity. The secant stiffness variations are al- most similar, each specimen represents significant degradation. Compared with end-plate thickness, high-strength bolt di-ameter have a more significant influence on the bearing capacity and initial stiffness of joints,increasing the bolt diameter, the ductility and energy dissipation capacity enhance obviously, however, there is no apparent effect while increasing the thickness of end-plate.

关 键 词：中厚壁冷弯型钢 外伸端板连接节点 抗震性能 非线性有限元分析 

分 类 号：TU311[建筑科学—结构工程]