Stability behavior of channels with inclined simple edge stiffeners under eccentric compression loading

Abstract:

In order to promote the engineering application of the channels with inclined simple edge stiffeners and definite the difference between it and lipped channels,a total of 70 examples with seven stiffener inclined angles and ten different eccentricities under eccentric compression loading acted in the plane of axis of symmetry were selected to be studied by nonlinear finite element analysis using program ANSYS.Effects of the above parameters on stability capacity,buckling modes and deflection behavior of channels with inclined simple edge stiffeners under eccentric compression loading were investigated.The result shows that the stability capacity and buckling modes are notably affected by eccentricity.No member got the maximum carrying capacity at zero-eccentricity.At the same negative eccentricity,the carrying capacity of member gradually reduced with the stiffener inclined angles increasing,but little differences among the carrying capacities could be observed when the stiffener inclined angle is an obtuse angle,which doesn’t affect the carrying capacity anymore.The earlier distortional buckling occurred,the lower carrying capacity of member would be obtained under the positive eccentric compression loading.