2024 Volume 80 Issue 13 Article ID: 23-13111
In the seismic design of road bridge specifications, when considering level 2 earthquake motion, the effects of various phase characteristics of earthquake motion are taken into account by selecting acceleration waveforms with phase characteristics that increase the nonlinear response of the bridge and inputting at least three waveforms. However, it is not clear whether the effects of phase characteristics on structures can be taken into account by inputting at least three waveforms for all types of structures. In this study, the appropriate number of input earthquake motions was examined using three different models of single piers as examples. As a result, it was statistically confirmed that at least three waveforms were input and the average of the response values was obtained with the same reliability as that obtained by inputting a large number of waves (about 20 waves).
