Theoretical and experimental investigation of position-controlled semi-active friction damper for seismic structures

Lu, Lyan Ywan; Lin, Tzu-Kang; Jheng, Rong Jie; Wu, Hsin Hsien

doi:10.1016/j.jsv.2017.09.029

Cited by 29 publications

(19 citation statements)

References 33 publications

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“…Different passive control devices may be installed at the storey having the same intermediate height as that of the corridor to mitigate the dynamic responses when these responses do not satisfy the requirement of design standards. ese different types of passive control devices can be categorized into displacement-dependent such as metal friction dampers [32,33] or buckling-restrained braces [34], velocitydependent such as fluid viscous dampers [35][36][37][38][39], or acceleration-dependent primarily related to inerter devices [40][41][42].…”

Section: Mathematical Model Of the Adjacent Buildings Under Wind And Seismic Excitationsmentioning

confidence: 99%

Comparison of Dynamic Responses of Parallel‐Placed Adjacent High‐Rise Buildings under Wind and Earthquake Excitations

Wang

Tiwari

et al. 2021

Shock and Vibration

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Two parallel-placed adjacent high-rise buildings are often linked to each other through passive control devices for vibration mitigation purposes. The mitigation efficiency of these control devices mainly depends on the characteristics of relative dynamic responses, namely, opposite-sign and same-sign responses of the two buildings. The present research first identifies an opposite-sign response factor to estimate the time ratio of opposite-sign responses. Subsequently, a structure comprising two adjacent high-rise buildings (with different natural frequency ratios) subjected to both wind and earthquake excitations is analyzed. Wind-induced responses are evaluated based on wind loads obtained from wind tunnel tests, while earthquake responses are determined through a suite of 44 natural ground-motion records. The results indicate that opposite-sign factors of the displacement, velocity, and acceleration responses under wind loads, especially at across-wind direction, are larger than those under earthquake excitations, and opposite-sign response factors under wind loads are insensitive to variation of the natural frequency ratio of the two adjacent buildings compared with those under earthquake excitations. The conclusions of this research may be helpful for wind-resistant and antiseismic design of parallel-placed adjacent high-rise buildings.

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Section: Mathematical Model Of the Adjacent Buildings Under Wind And Seismic Excitationsmentioning

confidence: 99%

Comparison of Dynamic Responses of Parallel‐Placed Adjacent High‐Rise Buildings under Wind and Earthquake Excitations

Wang

Tiwari

et al. 2021

Shock and Vibration

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“…They find that the magnitude of the exciting force has a nonlinear influence on the shape of the frequency response strain of the beam. In the semi-active experimental friction damper case of Lu et al [40], the pivot position of a lever arm is controlled to modify the transmitted friction force. Latour et al [32] use linear variable differential transformers (LVDT) to measure the displacements of their friction damper setup.…”

Section: Dampingmentioning

confidence: 99%

A review of friction damping modeling and testing

2019

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This survey provides an insight into the modeling and testing of uniaxial friction dampers. The focus is on attenuating the linear relative movement along planar surfaces for frequencies between 10 Hz and 1 kHz. An overview of the different approaches seen in the literature concerning friction damping is provided. Examples and evaluation of such dampers excited over a wide range of frequencies are presented. The information required to develop models of friction dampers is covered. To that end, different modeling approaches are presented for dry friction. Dynamic friction models with an internal state are covered, and their advantages are described. Other modeling approaches are reported for complete systems with friction dampers. Both numerical and analytical models are covered. Experimental configurations from a selection of authors are also included. Finally, a series of suggestions for the numerical modeling and experimental testing of a friction damper are given.

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“…While passive damping systems are now widely accepted and applied in the structural engineering field (Ubertini 2010;Wu and Phillips 2017;Amjadian and Agrawal 2018), they typically exhibit a limited performance bandwidth, and are therefore restricted to achieve the prescribed performance under a single type of hazard (He et al 2003;Lu et al 2008;Cao et al 2016). Recently, research on high-performance control systems (HPCSs), including active (Ubertini 2008;Materazzi and Ubertini 2011;Venanzi et al 2012), semi-active (Cao et al 2015;Amjadian and Agrawal 2017;Lu et al 2018) and hybrid (Love et al 2011;Shin et al 2013;Høgsberg and Brodersen 2014) systems, has demonstrated the great potential of these devices for vibration mitigation. Due to their adaptive nature, HPCSs have the capability to perform over a wide excitation bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Life-Cycle Cost Evaluation Strategy for High-Performance Control Systems under Uncertainties

et al. 2020

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High-performance control systems (HPCSs), including active, hybrid, and semi-active control strategies, can perform over a wide excitation bandwidth and are therefore good candidates for multi-hazard mitigation. However, the number of HPCS applications in the field is very limited. This is likely due the perceived high costs of installation, maintenance, possible malfunction, and lack of tools to financially justify their implementation. Such financial justifications could be conducted through life cycle cost (LCC) analysis, but would result in a computationally demanding task due to the very large number of simulations required given the large number of uncertainties. In this paper, two sets of methods for conducting LCC analyses are compared, and their performance is assessed as a function of LCC estimation accuracy and computational requirements. The first set is based on deterministic scenarios, and is based on the simulation of all possible scenarios, termed what-if analysis. Variations of the what-if method are investigated, where the simulations are only conducted for the most likely scenarios, termed most-likely (ML) analysis. The second set is based on stochastic scenarios, and is based on Monte-Carlo (MC) analysis. Variations of the MC method are investigated, one based on the coefficient of variation of output data, and one proposed by the authors based on the convergence of the estimated costs, termed bounded MC. A demonstration of the LCC analysis methodology is conducted, where an HPCS is used for the mitigation of seismic-induced vibrations on a five story structure. Uncertainties under consideration include sensor failure, mechanical wear, and seismic events. Results are compared against the uncontrolled structure and a passive viscous strategy, and demonstrate that 1) the LCC methodology can be used to financially justify the utilization on an HPCS; and 2) the bounded MC method leads to accurate cost estimations using a lower number of simulations.ABSTRACT High-performance control systems (HPCSs), including active, hybrid, and semi-active control strategies, can perform over a wide excitation bandwidth and are therefore good candidates for multi-hazard mitigation. However, the number of HPCS applications in the field is very limited. This is likely due the perceived high costs of installation, maintenance, possible malfunction, and lack of tools to financially justify their implementation. Such financial justifications could be conducted through life cycle cost (LCC) analysis, but would result in a computationally demanding task due to the very large number of simulations required given the large number of uncertainties. In this paper, two sets of methods for conducting LCC analyses are compared, and their performance is assessed as a function of LCC estimation accuracy and computational requirements. The first set is based on deterministic scenarios, and is based on the simulation of all possible scenarios, termed what-if analysis. Variations of the what-if method are investigated,where the simu...

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Theoretical and experimental investigation of position-controlled semi-active friction damper for seismic structures

Cited by 29 publications

References 33 publications

Comparison of Dynamic Responses of Parallel‐Placed Adjacent High‐Rise Buildings under Wind and Earthquake Excitations

Comparison of Dynamic Responses of Parallel‐Placed Adjacent High‐Rise Buildings under Wind and Earthquake Excitations

A review of friction damping modeling and testing

Life-Cycle Cost Evaluation Strategy for High-Performance Control Systems under Uncertainties

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