THE ADVANCED ANALYSIS THEORY AND PROGRAM OF 3-DIMENSIONAL STEEL FRAME STRUCTURES
A second-order plastic-zone program has been developed for analyzing 3D steel frames. Motion of beam-columns is described by the updated Lagrange formulation, and the stiff matrixes are derived by taking the solution of differential equation of tension, compression and bending component as the shape functions. The Von Mises yield criterion in combination with the Zeigler mixed hardening assumption and an association flow rule is incorporated into the material nonlinearity consideration, and the constitutive equations based on isotropic plastic accumulative damage are derived. Gradual yielding is modeled through the numerical integration at all integration points on member cross-sections, which are located at the selected integration points along the member length. The program can be used to trace the limit load, flex point of space structure, the validity of the theory and programs are verified by a number of testing examples. Finally, the potential application of plastic-zone analysis for large-scale building frames is illustrated.
Advanced analysis program beam-column element stiff matrix plastic-zone model steel frame structure
J. P. Hao L. K. Wang M. H. Wang J. F. Zhang
School of Civil Engineering, Xian University of Architecture and Technology, Xian, China College of Civil Engineering and Traffic Engineering, Beijing Institute of Civil Engineering and Arc
国际会议
上海
英文
265-273
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）