2021 Volume 59 Issue 1 Pages 15-23
This work presents an evaluation method of the dynamic pressure acting on the cylindrical liquid storage tank for the modified seismic coefficient method which is a foremost important seismic resistant design method. A sim-ple equation of motion for the seismic response of cylindrical tanks from a velocity potential flow and the shear beam approach was developed for examining combination methods of two kinds of dynamic pressures acting on the cylindrical tank shell; namely, the dynamic pressures induced by the rigid motion and it induced by the flexile deformation of the tank shell. The time history analyses using by the artificial seismic wave, which represent the design response spectrum in the modified seismic coefficient method, were conducted. As the results, a rational combination method of two kinds of dynamic pressures for evaluating the modified seismic coefficient method is presented. The evaluated dynamic pressures obtained by the pre-sented method are compared and discussed with the dynamic pressures ob-tained by the current seismic resistant design guideline, and the applicability of the presented method is demonstrated.
