ELASTIC FLEXURAL-TORSIONAL BUCKLING ANALYSIS USING FINITE ELEMENT METHOD AND OBJECT-ORIENTED TECHNOLOGY WITH C/C++

摘要: Flexural-torsional buckling is an important limit state that must be considered in structural steel design. occurs when a member experiences significant out-of-plane bending and twisting. This type of failure suddenly members with much greater in-plane stiffness than torsional or lateral stiffness. loads may predicted using energy methods. thesis considers the total potential equation for flexural-torsional beam-column element. The formulated by summing strain external loads. Setting second variation equal to zero provides equilibrium position where transitions from stable unstable state. finite element method applied conjunction analyze problem. To apply method, displacement functions are assumed cubic polynomials, shape used derive geometric matrices. matrices assembled obtain global structure. final obtained form eigenvalue structure determined solving equation. compatible software development so computer technology utilized aid analysis process. One most preferred types object-oriented approach. Object-oriented technique organizing around real world objects. An existing package which calculates elastic plane frame was previous research. program refactored into design improve increase its flexibility. Several examples presented compare results solutions. These show acceptable analyzing subjected concentrated moments concentrated, axial, distributed