الفهرس 
INTRODUCTlON AND LITERJ\RTURE REVIEWOnly 14 pages are availabe for public view
 |  | from | 141 |  |  |
| | | from | 141 | | |
Abstract
ABSTRACT
In this Thesis, the structural behavior of thin-walled columns with different shapes of cross section under centerical and eccentricalloads is studied.
The differential equations relating to external and internal loads for column with unsymmetrical cross section are presented . The interaction between local and overall buckling of thin-walled beam-columns under different loading is analyzed by means of the general elastic stability theory. Initial imperfections and residual stresses are taken into consideration.
A numerical solution is introduced in order to solve the system of differential equations by using a combination of the finite difference and the successive approximation methods.
The verification of the analytical method is realized by using almost all-previous-tests results. The good agreement between tests and analytical results permits to give the proposed method a good validity in determining the critical loads as well as the behavior of columns for different cases of loading and end conditions.
The limits for the local buckling are studied for columns with C and Z cross sections and compared with the Egyptian Code, Euro Code and the American Code.
The critical load is calculated for C and Z sectior.s with lip and without lip, and for equal angle with lip under centerical and eccentricalloads . The charts are drawn to present these relationships.
The critical loads and the different deformations are calculated with a computer program coded in FORTRAN 77 by the author.