FLEXURAL-TORSIONAL BUCKLING OF PIN-ENDED ARCHES WITH T-SECTION UNDER A CENTRAL RADIAL CONCENTRATED LOAD

It focus on the flexural-torsional buckling load of pin-ended arches with T-section under a central concentrated load. In this paper, the strain-displacement relationship of T-section is obtained considering the influence of shear deformation. And then accurate prebuckling analyses for in-plane internal forces are performed. According to the principle of stationary potential energy and Rayleigh-Ritz method, the analytical solution for the flexural-torsional buckling load of T-section arch is obtained. The theoretical results of the flexural-torsional buckling loads are in good agreement with the finite element results, which demonstrates the correctness of the theoretical analysis. It is found that the monosymmetry parameters β_x affects the flexural-torsional buckling load obviously while the shear deformation affects the flexural-torsional buckling load of shallow arches significantly.