For mega-scale frame structures, the shear deformations of mega beams and columns are significant, and thus necessary to be considered in the stability analysis of the structure systems. The stability of rigid frame structures is analyzed by considering the effects of beam and column shear deformations. The stability of symmetric frames with symmetric or asymmetric loads on the top of columns and the stability of asymmetric frames with asymmetric loads on the top of columns are studied, respectively. The ef...