多層建物の損傷と相関が高い地震動の強さの指標

概要

論文の詳細を見る
PGA or PGV is used to normalize ground motions in the seismic response analysis of buildings. However, these are not proper measures for the wide range of the natural periods. A new intensity measure, a modified maximum impulse, is proposed which is defined as a small value between the maximum impulse and the product of PGA and a quarter of the natural period. The correlation coefficients between seismic damage of multistory buildings and four normalization intensities including these three measures are analyzed by the time history response analysis using about seventy strong motions obtained in Japan, U.S.A. and China. Seismic damage is defined as the yielding shear force of a multistory building corresponding to the critical ductility factor of 2 or 4. The correlation coefficient between structural damage and the modified maximum impulse are over 80% for the natural periods from 0.2 second to 1.0 second.
一般社団法人日本建築学会の論文
2004-03-20