翼缘削弱型节点钢结构的力学性能研究  

STUDY OF THE MECHANICAL PERFORMANCE OF STEEL STRUCTURES WITH REDUCED BEAM SECTION CONNECTIONS

作　　者：韩明岚[1] 王燕[2] 陈建林[1] 王慧[2] 

机构地区：[1]青岛理工大学理学院,山东青岛266033 [2]青岛理工大学土木工程学院,山东青岛266033

出　　处：《钢结构》2016年第5期6-11,5,共7页Steel Construction

基　　金：国家自然科学基金项目(51278259);山东省联合专项基金项目(ZR2012EEL26)

摘　　要：对翼缘削弱型节点框架进行变形、平面内稳定承载力以及梁平面外屈曲等方面的综合分析。利用MATLAB数值语言编制有限元程序对框架进行变形分析;利用ANSYS有限元软件对框架结构进行特征值屈曲分析和非线性屈曲分析;在梁临界弯矩计算式基础上,采用梁单元对梁进行了平面外屈曲分析;将以上几方面的分析结果和普通节点框架的计算结果进行对比,详细阐述梁端削弱对翼缘削弱型节点钢框架的力学性能影响。研究结果表明:梁翼缘削弱会增大钢框架的侧向变形、降低钢框架的稳定承载力,导致梁更易发生平面外屈曲,在工程应用中要充分考虑梁翼缘削弱的影响。The comprehensive analysis of steel frame with reduced beam section connections was performed in terms of deformation,stable bearing capacity and out-plane bucking of beam. The deformation analysis was also conducted by using finite element program written by numerical language MATLAB. The eigenvalue buckling and nonlinear buckling analysis were carried out in steel structures by using software ANSYS. On the basis of critical moment formulation of beam,outplane bucking of the beam was analyzed by using beam elements. The results were compared to that of steel structures with ordinary connections,and the influence of beam end cut on the mechanical properties of the steel buildings with reduced beam section connections were described in detail. The results showed that reduced flange could increase the lateral deformation of the steel frames,and decrease the stable bearing capacity,even easily cause beam to occur out-plane buckling. As a result,the influence of reduced beam flange should be considered thoroughly in practical application.

关 键 词：翼缘削弱型节点 钢结构 变形分析 稳定承载力 平面外屈曲 

分 类 号：TU391[建筑科学—结构工程]