Performance evaluation of vibration control device for sedimentation device with inclined plates by vibration experiment

Abstract

Sedimentation device with inclined plates used in sedimentation tanks of water purification plants are often damaged by earthquakes, and the damage is caused by sloshing in addition to seismic response. In this study, the vibration control performance of a steel damper developed to prevent sloshing of sedimentation device with inclined plates was confirmed through vibration tests. A water tank containing a full-size inclined plate was vibrated by actual seismic waves, and various data were collected from sensors installed on the damper and inclined plate. As a result, the damper exhibited vibration control performance when sloshing occurred, and the occurrence of sloshing was suppressed. It was also confirmed that the damper suppressed damage to the sloping plate itself. The number of dampers installed and the thickness of the damper also made a difference in the damping performance of the damper. From these results, it was found that the damper is useful as an anti-sloshing measure.