Shared Tuned Mass Dampers for Mitigation of Seismic Pounding

Abstract

This study explores the effectiveness of shared tuned mass damper (STMD) in reducing seismic pounding of adjacent buildings. The dynamics of STMDs is explored through numerical simulations of buildings idealized as single and multiple degree of freedom oscillators. An optimization method proposed in the literature is revisited. It is shown that the optimization results in two different solutions. The first one corresponds to the device being tuned to one of the buildings it is attached to. The second solution corresponds to a very stiff system where the TMD mass hardly moves. This solution, which has been described as an STMD in the literature, is shown to be impractical due to its high stiffness and use of a heavy stationary mass that plays no role in response mitigation but adds unnecessary load to the structure. Furthermore, it is shown that the second solution is equivalent to a viscous coupling of the two buildings. As for the properly tuned solution, i.e., the first solution, sharing the device with an adjacent building was found to provide no added benefits compared to when it is placed on one of the buildings. Based on results from a large set of real earthquake ground motions, it is shown that sharing a TMD mass with an adjacent building, in contrary to what is reported in the literature, is not an effective strategy.

Multihazard Response Control of Base-Isolated Buildings under Bidirectional Dynamic Excitation

“…Earthquakes have been and remain to be one of the prominent threats to the safety and serviceability of civil engineering structures and infrastructure systems. Numerous strategies have been proposed, researched, and implemented for seismic protection of structures [1][2][3][4]. e use of structural response control strategies has been proven to be an effective approach.…”

Editorial for “Recent Advances in the Design of Structures with Passive Energy Dissipation Systems”

“…One paper concerns the challenging task of designing lead rubber bearings considering different performance requirements [10]. The performance of some variants and improvements of the classical concept of tuned mass damper is also analyzed in various applications and configurations [6,8,12]. Novel dissipation devices are finally developed and analyzed from an experimental and a numerical point of view [5,7,9].…”

“…In paper [12], Rupakhety et al explore the effectiveness of shared tuned mass damper (STMD) in reducing seismic pounding of adjacent buildings. The authors carefully revisit the idea of STMD reported in a paper from the literature [Earthq.…”

Effectiveness of Friction Dampers in Seismic and Wind Response Control of Connected Adjacent Steel Buildings

“…e concept allows two dynamically similar and/or dissimilar structures to exert the forces upon one another for overall response reduction of the system. e available studies showed improved performance of the structural systems by connecting different passive control devices to limit the pounding actions under earthquake ground motions [14,[33][34][35][36][37][38][39]. Overall, the FDs have offered its potential in minimizing the extreme vibrations installed in a structure; however, research strategies have not been implemented to assess the response and quantify the effectiveness of the FDs for coupled adjacent buildings under both seismic and wind excitations.…”