When the structure faces the in-plug compression load its plates do not displace until that compression load reaches the critical buckling load
denoted by [P.sub.cr].
where [M.sub.PR] is the reduced plastic moment capacity of the steel column section, L is the column length, and [P.sub.cr] and k are the Euler buckling load
and the effective length factor of the column, respectively.
In this case, the induced gain on the buckling load
For stress calculations, the safety factor was set equal to 2.0, while for buckling load
, the safety factor was taken as 3.0.
It was also concluded that the design rules given in Eurocode 4 for circular and rectangular CFST columns may be adopted to calculate the axial buckling load
of elliptical CFST columns although using the imperfection of length/300 specified in the Eurocode 4 might be over- conservative for elliptical CFST columns with lower non-dimensional slenderness.
The condition for the stabilization of the progressive crushing mode was that the buckling load
should be sufficiently greater than the progressive crushing load.
This is a load equal to the critical buckling load
of the FRP minus the yield load carried by the FRP ([P.sub.cr_sf_vart2] + [P.sub.sfy] < [P.sub.sfu]).
They come to the conclusion that increasing porosity decreases buckling load
and the plate will be unstable by then.
If the axial force is smaller than the critical buckling load
, the tubular string lies on the bottom of the wellbore.
The model presently estimates the critical buckling load
in any drilling situation to estimate loads and stresses that can be safely applied on the drill string .
The CFRP strengthening has demonstrated higher buckling load
and compressive load bearing capacities.
In this study we apply HAM to find the critical buckling load
of a column under end load dependent on direction.