Response spectrum calculation method for liquid storage structure subjected to ground shock

Abstract

The protective performance of liquid storage structures (LSSs) is intrinsically linked to the safety reserves of strategic resources, necessitating the development of a simplified calculation framework to assess their dynamic responses to ground shock resulting from explosions. Utilizing a two-dimensional generalized single-degree-of-freedom theoretical model in conjunction with seismic response spectrum theory, this study proposes a methodology for calculating the response spectrum associated with the effects of explosion-induced ground shock on LSSs, taking into account various explosion parameters. The validity of this calculation method is substantiated through model tests conducted on an explosion shock and vibration simulation platform. This approach enables the determination of maximum values for structural displacement, velocity, acceleration, shear force, and bending moment. Furthermore, the introduction of intermediate coefficients and corresponding value tables streamlines the computation of essential dynamic characteristic parameters, thereby enhancing the practicality for engineering calculations. The calculation process for assessing the effects of the ground shock on LSSs is presented, accompanied by an analysis of a specific case study. The findings indicate that the ground shock poses a greater risk of inducing significant deformation in LSSs compared to natural ground motion, particularly in low-period structures.