Semi-active direct control method for seismic alleviation of structures using MR dampers

Rahbari, Nima Mohajer; Azar, Bahman Farahmand; Talatahari, Siamak; Safari, Hadi

doi:10.1002/stc.1515

Cited by 46 publications

(19 citation statements)

References 28 publications

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“…Hence, several parametric mechanical models have been proposed to describe the nonlinear behavior of MR dampers (Spencer et al ., ; Wereley et al ., ; Choi et al ., ; Yang et al ., ; Kwok et al ., ; Kwok et al ., ). The most reputable model that suitably predicts their behavior (Spencer et al ., ; Yang et al ., ; Kwok et al ., ) and has been popularly used to simulate MR dampers' semi‐active control systems (Dyke and Spencer, ; Dyke et al ., ; Dyke and Spencer, ; Jansen and Dyke, ; Yi et al ., ; Jung et al ., ; Zapateiro et al ., ; Karamodin and Kazemi, ; Farahmand Azar et al ., ; Mohajer Rahbari et al ., ) is smoothly varying Bouc–Wen mechanical model (Figure ) initially applied by Spencer et al . (Spencer et al ., ) to portray dynamic behavior of MR dampers.…”

Section: Bouc–wen Modelmentioning

confidence: 97%

“…According to the obtained results in previous section as well as other similar research works (Dyke and Spencer, ; Dyke et al ., ; Dyke and Spencer, ; Jansen and Dyke, ; Yi et al ., ; Jung et al ., ; Ha et al ., ; Nguyen et al ., ; Zapateiro et al ., ; Karamodin and Kazemi, ; Farahmand Azar et al ., ; Mohajer Rahbari et al ., ), semi‐active MR dampers make the structures intelligent to adaptively decline the structural responses particularly inter‐storey drift under various vibrational conditions. However, the MR dampers or other semi‐active control systems have been seldom applied for the real civil infrastructures.…”

Section: Numerical Study and Comparative Surveymentioning

confidence: 99%

“…In this method, the optimal magnitude of current voltage that is applied to produce a magnetic field in the MR damper is calculated directly using linear quadratic regulator optimal (LQR) control algorithm for propelling the MR damper control force towards the estimated optimal control force at any moment. The direct controller's performance has been shown to outweigh its bang-bang counterparts (Mohajer Rahbari et al, 2012). However, note that any other semi-active controller such as the clipped-optimal controller, as one of the most promising bang-bang (on-off) controllers, could be chosen to address the purpose of current work.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the efficiency of semi‐active smart structures: self‐regulating MR dampers control system for tall buildings

Rahbari

Talatahari

2013

Structural Design Tall Build

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SUMMARYMany severe dynamical loadings such as earthquakes and strong winds may subject to structural systems during their lifetime and lead to changes in structural characteristics. Hence, employing an adaptive control strategy that can deal with these alterations compound with design of the structural elements would undoubtedly be the most effective alternative design for the old-fashioned design methods, which are relatively inefficient in response to these unforeseen conditions. In the current study, benefits of employing the modern control systems for design of tall buildings in comparison with the uncontrolled traditionally designed structures are thoroughly investigated. To contract the vibrational responses due to seismic excitations, the innovative direct-modulating semi-active controller is designed for magneto-rheological dampers, which are installed in an 11-storey sample building converting it to a smart structure. Copyright

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Section: Bouc–wen Modelmentioning

confidence: 97%

Section: Numerical Study and Comparative Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the efficiency of semi‐active smart structures: self‐regulating MR dampers control system for tall buildings

Rahbari

Talatahari

2013

Structural Design Tall Build

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“…LQR control algorithm: In order to evaluate effectiveness of the proposed IBFC, semi‐active system with the LQR algorithm, which has been developed by Kurata et al, was used to compare the results. LQR is widely used in optimum control techniques in structural control problems that finds an active control parameters to minimize the cost function given by the form:

J = \frac{1}{2} \int_{0}^{\infty} ((),, {\{z (t)\}}^{T} ([],, Q) ({},, z ((),, t)) + {\{u (t)\}}^{T} ([],, R) ({},, u ((),, t))) italicdt .

…”

Section: Implementation Of the Proposed Control System In Buildingsmentioning

confidence: 99%

Improved semi-active control algorithm for hydraulic damper-based braced buildings

Azimi

Rasoulnia

Lin

et al. 2017

Struct Control Health Monit

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Summary Much research has been conducted on structural control systems to improve the seismic performance of structures under earthquakes and, ultimately, offer high performance‐resilient buildings beyond life risk mitigation. Among various structural control algorithms, semi‐active control strategies have been widely accepted for overcoming some limitations existed in either passive or active control systems, thereby leading to better structural performance over their counterparts. In this study, a new semi‐active control algorithm with minimum control parameters is developed to drive the hydraulic damper for effective control of the dynamic deformation of low‐ and high‐rise building structures under earthquake loadings. The new controller allows less input and computation for determining the damping coefficient of the hydraulic dampers while maintaining a higher performance. V‐braced buildings with three varying heights are used as prototypes to demonstrate the effectiveness of the proposed semi‐active damper. Two critical parameters, maximum drift and acceleration of stories, are defined for the performance criteria. The simulation results show that the developed semi‐active damper can significantly improve the seismic performance of the buildings in terms of controlled story drift and acceleration. By use of less input and reduced time delay effects, the proposed control system is comparable with those of existing semi‐active controllers. The findings in this study will help engineers to design control systems for seismic risk mitigation and effectively facilitate the performance‐based seismic design.

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“…The design of integrated structural design and control scheme lies, firstly, upon the energy efficiency of control strategies that explicitly incorporate actuator dynamics and controlstructure interaction into the design process [Mohajer Rahbari et al, 2012], and secondly, upon the optimization of placement and distribution of the control devices (see Sec. 3.2), including the possibility of embedding devices within the structure, during the early stages of the design process.…”

Section: Integrated Design Of Structure and Control Schemementioning

confidence: 99%

Technical Note: Active and Semi-Active Strategies to Control Building Structures Under Large Earthquake Motion

Morales‐Beltran

Paul

2015

Journal of Earthquake Engineering

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Structural Design, Architectural Engineering and Technology, Faculty of Architecture and the Built Environment, TU Delft, Delft, the NetherlandsAs of today, about 80 buildings equipped with active or semi-active devices for wind and earthquake-induced motion control have been reported. In the first part of this technical note, full-scale applications are reviewed to investigate whether large and severe earthquake levels were targeted as control objectives. In the second part, not yet implemented research studies (2011 -2014) are reviewed. The main conclusion is that strategies integrating control and structural design are the key for implementing large earthquake-target control devices in buildings.

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Semi-active direct control method for seismic alleviation of structures using MR dampers

Cited by 46 publications

References 28 publications

On the efficiency of semi‐active smart structures: self‐regulating MR dampers control system for tall buildings

On the efficiency of semi‐active smart structures: self‐regulating MR dampers control system for tall buildings

Improved semi-active control algorithm for hydraulic damper-based braced buildings

Technical Note: Active and Semi-Active Strategies to Control Building Structures Under Large Earthquake Motion

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