Abstract
In previous studies, growth phenomena of bow-shaped deflection mode in multistory multibay weak-beam-type planar frames has been predicted by symmetry limit theory and equilibrium path bifurcation theory. To verify the validity of the theoretical prediction of the bow-shaped mode appearance, static and dynamic loading tests on the 3-story 1-span miniature model frame of weak-beam-type have been carried out. In the present article, Part I, the results of static loading tests are shown. The theoretical prediction method for the bow-shaped mode appearance is verified and the characteristics of the collapse behavior of the frame under repeated loading is clarified. In Part II, the results of dynamic loading tests will be shown. The gradually drifting phenomena of the sway-mode vibration center will be shown in the frame under the condition that the growth of the bow-shaped mode can be suppressed.
