STUDY OF MAXIMUM RESPONSE OF STRUCTURES SUBJECTED TO ARTIFICIAL GROUND MOTIONS HAVING EQUIVALENT PHASE PROPERTIES AND DIFFERENT LEVELS OF ENERGY SPECTRUM

Abstract

Influences of energy level of artificial ground motions on characteristics of response spectrum are discussed. The 10%-damped energy spectra and 10%-damped acceleration response spectra are computed in various frequency bands using artificial ground motions with equivalent phase properties and different energy characteristics. As a result, though all artificial ground motions are compatible with a 5%-damped design acceleration response spectrum defined in Japan’s code, tendencies for the acceleration response spectrum to decrease as the level of the energy spectrum increase are observed in almost all frequency bands. Consequently, it is recommended that designers consider the characteristics of the energy spectrum, as well as the phase properties of design artificial ground motions.