Two-stage optimum design of tuned mass dampers with consideration of stroke

Abstract

This paper presents a two-stage optimum design procedure for passive tuned mass dampers (PTMDs) to reduce structural dynamic responses with the limitation of PTMD stroke. A new performance index, with the linear combination of structural response ratio and PTMD stroke ratio by a weighting factor alpha, is proposed. alpha ranges from 0 to 1.0. The larger the alpha, the more important the consideration of the stroke. When alpha equals 1.0, the PTMD is locked. The analytical results show that with little sacrifice Of Structural control effectiveness, the PTMD stroke can be significantly suppressed when an appropriate alpha is selected. The numerical simulation of a three-story building under earthquake excitations demonstrated that the proposed optimum PTMD performs as well as the conventional PTMD and its stroke is 30% reduced. Based on the analysis results, it is proved that the new optimum design concept is more flexible and useful in practical application. Copyright (c) 2009 John Wiley & Sons, Ltd

Sensitivity Analysis of the Effectiveness of Tuned Mass Dampers to Reduce the Wind-Induced Torsional Responses

“…More recently, the use of multiple TMDs to reduce the peak responses of structures, that are sensitive to torsional effects, has been reported by Jangid and Data (1997), Pansare and Jangid (2003), Li and Qu (2006), Bakre and Jangid (2007) , and Wang et al (2009). The excitations considered in these studies do not differ from those mentioned previously.…”

“…The excitations considered in these studies do not differ from those mentioned previously. For instance, Jangid and Data (1997), Bakre and Jangid (2007), and Wang et al (2009) used an exciting force represented by band limited white-noise; Pansare and Jangid (2003) and Li and Qu (2006) analysed structures subjected to external harmonic excitations. The damping mechanism of the TMDs (i.e.…”

Optimum design and experimental study of multiple tuned mass dampers with limited stroke

“…In some cases, a near-zero damping is possible, which leads to considerable MTMD stroke. To consider the stroke issue in design stage, Wang et al [16] developed a two-stage optimum procedure to design the parameter of a single TMD. In their study, a stroke weighting factor representing the importance on the reduction of TMD's stroke was included in the objective function.…”

“…In this paper, a two-stage optimization procedure for the design of MTMD parameters was developed based on the study by Wang et al [16]. An economical consideration for MTMD design is included in the proposed optimization theory.…”

Vibration control of seismic structures using semi-active friction multiple tuned mass dampers

“…Vibration control of civil engineering structures using tuned mass dampers (TMDs) has become a widely accepted control strategy after numerous analytical and experimental verifications [1][2][3][4][5][6]. TMDs can be incorporated into any structure with less interference compared with other energy dissipation devices.…”