Effect of residual stresses on the strength of partially encased composite columns (Research Note)

The effect of residual stresses on the load-carrying capacity of partially encased composite columns subjected to eccentric loads has been studied. Linear residual stress distribution of 0.33 Fy in tension and in compression has been used for the flanges of the I-section while the web is assumed to be free of residual stresses. The maximum strength of pin-ended partially encased composite columns in single curvature is obtained by deflection methods using numerical integration. The effect of residual stresses on M-P- φ behavior, and on the failure loads of nineteen columns tested at the University of Jordan is presented in this report. (author). 6 refs., 6 figs., 2 tab