| A New Beam Column Element of Space Framed Structures for Nonlinear Analysis of Geometric Material |
| |
| 作者姓名： | ZHANG Jun feng HAO Ji ping and WANG Lian kun |
| |
| 作者单位： | School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China;;School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China;School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China |
| |
| 摘 要： | An incremental virtual work equation of three dimensional(3D) beam column element is proposed based on the UL method. The geometric nonlinear tangent stiffness matrix for 3D beam column element is deduced with the consideration of warping, shear deformation and effects of moment spatial rotation. Material nonlinearity is addressed by introducing plastic hinges at the element ends. And the Orbison sectional strength is modified in order to consider the effects of torsion moment and warping. The elastic plastic tangent stiffness matrix is acquired as the element ends are in plastic phase based on the flow theory. With a case studied, it is shown that the model can be used to predict accurately the ultimate bearing capacity and instability mode of 3Dspace frames by only one or two elements, and address the effects of warping and shear deformations effectively.
|
| 关 键 词： | nonlinear spaced framed structure warping shear deformation plastic hinge ultimate bearing capacity |
| 收稿时间： | 2009-01-05 |
|
| 点击此处可从《保鲜与加工》浏览原始摘要信息 |
|
点击此处可从《保鲜与加工》下载全文 |
|
