Seismic Capacity Required for the Safety Limit Design of High-rise RC Buildings under Long-period Ground Motions in Osaka, JAPAN and its Estimation Based on the Equivalent Linearization Method
Keywords:
Earthquake response analysis, Equivalent linearization method, Hysteretic damping, Long-period ground motion, Reinforced concreteAbstract
In June 2016, the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) in Japan delivered countermeasures against long-period ground motions caused by strong earthquakes along the Nankai trough. However, the countermeasures do not cover high-rise buildings equal to or shorter than 60 m in height, which do not require earthquake response analyses in the seismic design. Hence, in the present study, earthquake response analyses for such high-rise reinforced concrete (RC) buildings were performed under artificial ground motions assumed in the OS1 and OS2 regions to determine the base shear coefficients that satisfy a given safety demand. Furthermore, the results from the earthquake response analyses were estimated by the authors' proposed method based on the equivalent linearization method, showing good agreement and inspiring suggestions for more accurate and simplified estimations.
