A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures

Abstract

Deep liquid storage tanks cannot be implemented as tuned liquid damper (TLD) as the depth ratios often exceed the limit (0.3) for nonlinear sloshing and wave breaking.This study exploits the impulsive liquid mass to implement a tuned liquid mass damper (TLMD) by flexibly attaching the tank to the structure. The flexible mounting allows tuning of vibration of the impulsive mass to short period structures. The small, suboptimally tuned sloshing mass may also have minor contribute in dissipation. The performance of the TLMD is demonstrated by simulation and shake table experiments. The simulation involves solution of the governing equations for the structure-TLMD system, in which the vibration of liquid is described by the Housner model.The optimal parameters for tuning are obtained through optimization. The dynamic response evaluation employs a suite of far field, recorded ground motions of varying hazard levels to demonstrate robustness. The simulation and the experiment results corroborate well. Comparative assessments with TMD and TLD with identical mass ratios show comparable efficiency. Given that the stored liquid is employed for the functional purpose (unlike the added mass in TMD), the proposed TLMD may be a preferred alternative to conventional tuned mass damper (TMD) or TLD.

Research on dynamic stability of large deformation roadway with application of segmented resistance anchor bolt

“…The geological structures of most roadways are complex, and their differences in rock stratum are obvious. For soft rock roadway, small seismic vibration [1] can significantly damage the structure of surrounding rock. At present, how to improve the stability of large deformation roadway [2] support has always been a technical problem in civil engineering.…”

Efficient estimation of tuned liquid column damper inerter (TLCDI) parameters for seismic control of base‐isolated structures

“…Therefore, to face these issues, innovative types of liquid-based dampers have been explored in combination with other devices. The idea to retain the advantage of both the TMD and TLD to a certain extent, while partially eliminating the limitations of each, led to the alternative configurations of the hybrid mass liquid damper (Banerji & Samanta, 2011) and tuned liquid mass damper (Pandey et al, 2022) comprising a secondary mass attached to the primary structure through a spring-dashpot system and supporting a liquid damper. Similarly, a combination of a TLCD with TMD, referred to as a combined tuned damper, was investigated by L. Wang et al (2016) and its efficacy experimentally validated by Di .…”