Abstract:
This research aims to study buckling and postbuckling behaviors of two-member rigid-jointed frames,
which are fix-supported at both ends having a point load applied at the connecting point of the two members. Two
types of loads are considered consisting of non-follower and follower forces. The approximate solutions of buckling
shapes and load-displacement curves for both buckling and postbuckling behaviors are determined using the ABAQUS
finite element software in which shear and axial deformations are insignificant and negligible. The results illustrate
theoretically that, for any particular frame, there exist many possible postbuckling behavior curves. These curves consist
of the different buckling shapes and different postbuckling behavior-related critical loads. The lowest of these loads is
taken as the critical load. Considering the geometry of frame, a symmetrical frame can exhibit both symmetrical and
non-symmetrical buckling shapes. Importantly, these non-symmetrical buckling shapes are associated with the critical loads.