|
Cold-formed steel member has a high capacity , light weight , economy , construction of low labor intensity and many other advantages , being more and more widely applied to the field of architecture . Cold-formed steel , determine the carrying capacity , the distortional buckling factors that must be considered . Distortional buckling is different from a new member overall buckling and board of local buckling buckling mode . Cold-formed steel member buckling modes include: overall buckling, local buckling and distortional buckling . Firstly, according to the distortional buckling of cold-formed thin-walled C flexural modes , the establishment of distortional buckling differential equations in the horizontal and vertical load under pure bending of differential equations to derive the critical moment formula . Secondly, this paper test distortional buckling performance of cold-formed thin-walled C-shaped steel flexural distortional buckling of cold-formed C-shaped steel bending when the critical moment , according to the criteria of the distortional buckling , by comparison of the experimental and theoretical values ??, engineering applicable safety coefficient . Again , by the test method , analysis of the distortional buckling from the control effect of cold-formed C-shaped steel seismic performance . And test results were processed through the test from the hysteresis curve analysis to study the seismic energy dissipation . Finally, for distortional buckling of cold-formed thin-walled C-shaped steel flexural modes , the ridge at the intersection of the web and flange set the division of measures to improve the buckling load different partition layout and the partition forms of distortion buckling load impact effect by the finite element analysis .
|