Abstract
In this report, an Ultimate State Aseismic Design Method is proposed with criticism against the two kinds of Specifications for Seismic Loading, No.1 by Building Research Institute and No.2 by Profs. Kobori and Minai proposed and discussed in the committee of A.I.J.. It is pointed out that both the proposed Specifications for Seismic Loading, No.1 and No.2, are composed on the basis only of the abstract and digital results derived from elasto-plastic response analysis without reference to the Ultimate State of real structures. The Ultimate State Aseismic Design Method proposed here by the authors is, however, based on new fundamental aseismic concepts, i.e. Resonance Capacity (Eq.6 or 13) and Spacial Characteristics of Resonance Capacity (Fig.5), which are induced through the synthesis of the physical phenomena and characteristics of real structures and structural members, i.e. fracture, fatigue and hysteretic damping, and of the fundamental vibration phenomenon, i.e. steady-state resonance as the Ultimate State of structures.
