Dynamic Properties of a Spillway Radial Gate

Abstract

This paper presents the dynamic properties of a spillway radial gate. Recently, the seismic safety evaluation of the dam itself seems to be insufficient because the damage or failure of dam relevant structures and their equipment could bring about the dam failure and cause disastrous losses to the cities located downstream. Hence, the seismic safety of the dam relevant structures and their relate equipment must be taken into account. This study focuses on a spillway radial gate since it plays an important role to a dam spillway. Besides, any damage of a spillway radial gate may cause severe losses owing to flash flood caused by the uncontrollable release of the reservoir water. In this study, the representative spillway radial gate is selected from the dam located in Northern Thailand. The nonlinear response history analysis of the spillway radial gate is performed using finite element analysis. For the input motions, the maximum considered Earthquake (MCE) were considered. The earthquake records were then selected followingThailand, Seismic design criteria in National Standard DPT1302-6. Therefore, the dynamic properties of a spillway radial gate is then presented along with the note on the seismic safety of a spillway radial gate.