An Inelastic Material Model for Lateral Torsional Buckling and Biaxial Bending of Steel W-Shapes

作     者：Barry T.Rosson 

作者机构：Department of CivilEnvironmental and Geomatics EngineeringFlorida Atlantic UniversityBoca RatonFL 33431USA 

出 版 物：《Journal of Civil Engineering and Architecture》 (土木工程与建筑（英文版）)

年 卷 期：2021年第15卷第12期

页      面：599-603页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Nonlinear analysis lateral torsional buckling biaxial bending stiffness reduction material model 

摘      要：A new material model for beam elements was developed for use as normalized tangent modulus expressions when performing 3-dimensional second-order inelastic analyses of steel I-section *** stiffness matrix of a 14 degree-of-freedom beam element was updated to include the effects of yielding on ***’s torsion and bimoment stiffness at the initial and terminal nodes.A validation study compared the new model’s results with those from published detailed finite element analyses and was found to be in very close agreement.A biaxial end-moment study with two different depth-to-flange-width ratios provided expected and consistent results over a range of moment conditions.