TY - JOUR ID - 1113 TI - Non-linear elastic stability of rectangular frames under various loading JO - Iranian Journal of Science and Technology Transactions of Civil Engineering JA - IJSTC LA - en SN - 2228-6160 Y1 - 2013 PY - 2013 VL - 28 IS - 5 SP - 615 EP - 618 KW - Non-linear KW - post-buckling KW - Stability KW - frames KW - perturbation DO - 10.22099/ijstc.2013.1113 N2 - The post-buckling behavior of rectangular frames in an elastic domain is studied in depth. In analysis, unsymmetrical geometry, sway possibility and support conditions are considered in order to find their influences on load-deflection paths and non-linear deformations. The static perturbation technique is used for analysis and discussion. The first, a second order perturbation problem as an accurate measurement for the frame, is solved and the solutions compared with previously published papers. The results reveal that symmetric frames with a sway movement, due to lack of an axial force in the beam in the first order perturbation analysis, have a symmetric bifurcation point. However, the post-buckling behavior of un-symmetric frames with or without sway is bifurcated in an asymmetric manner UR - https://ijstc.shirazu.ac.ir/article_1113.html L1 - ER -