Dynamic Behaviour of Elevated Concrete Water Tank with Alternate Impulsive Mass Configurations

摘要

Analysis of hydrodynamic structure such as elevated concrete water tank is quite complicated when compared with other structures. As well as dynamic fluid-structure interaction (FSI) plays an important effects in this complexity for which research suggests solution by using different methods. This paper presents the dynamic behavior of elevated concrete water tank with alternative impulsive masses configurations. Six models were simulated to determine the effects of impulsive mass mode. Simulation of the models was carried out in three-dimensional finite element method via LUSAS FEA 14.1. An artificial ground motion compatible with a target response spectrum that developed by other researchers has been generated according to Gasparini and Vanmarcke procedure. The mass of impulsive mode has been obtained according to Errucode-8. The results of time for impulsive mode of free vibration and the response (time history) of node at highest level of the tank were then compared with added mass approach (Westergaard).