Seismic response analysis and damping method of spherical liquid storage tank

Abstract

Abstract Earthquake is a natural disaster with outburst and ruinous in the world. The damage of spherical liquid storage tank due to earthquake can result in serious deaths and economic loss. In this thesis, the analysis of seismic response of spherical tank, which considering interior pressure, gravity, liquid sloshing and earthquake, is carried out. Seismic response analysis shows that the spherical tank rotates horizontally while rotating a small amount around the horizontal axis, mainly around the vertical axis. Time-history analysis of the tank under passive control is performed. The spherical tank model with dissipative bracing system installed has a very good damping effect by comparing the seismic responses of controlled and uncontrolled structures.