Abstract
A theoretical analysis is performed on the post local buckling behavior of wide-flange beam-columns subjected to alternating horizontal load under constant vertical load. The method that was reported in previous paper (Part 1) is applied to the beam-columns subjected to alternating loading. The basic equation [Eq. (1)] is given by the principle of virtual velocities and principle of maximum specific power of dissipation. Analytical results based on the collapse mechanism shown in Fig.3 are compared with ones obtained in the previous paper [Ref.8)] and test results [Ref.6)]. Furthermore, corelation of the moment-rotation curves between under monotonic and alternating loading is investigated. The results may be summarised as follows, 1) The collapse mechanism curve based on the analysis shown in this paper is higher in strength than ones based on the analysis shown in the ref. 3). 2) The feature of the experimental moment-rotation curves are well predicted by the analysis. 3) Hysteretic loops of a beam-columns can be estimated from the curve obtained under monotonic loading.
