RESEARCH OF STRUCTURAL DAMAGE IN THE HYOGOKEN-NANBU EARTHQUAKE : Evaluation of new seismic design method and seismic assessments method based on damage of structures

Abstract

The Hyogoken-Nanbu Earthquake damaged a great amount of buildings in a various extent, seriously to slightly. We investigated 22 such buildings mainly located in or in the vicinity of the Sannomiya, Central district of Kobe city, where the seismic intensity (JMA) was estimated as VII. The New Seismic Design Method as well as the Seismic Assessments Method for existing reinforced concrete buildings and steel reinforced concrete buildings are applied to such buildings. Using these methods, their Structural Coefficient D_s and the Structural Aseismitic Index I_s are obtained. In general, the structural aseismitic performance is evaluated through the comparisons between the D_s and I_s value with the certain standard value for each of them. In this paper, we have tried to examine these standards by referring them to the corresponding extent of the earthquake damages.