Multi-hazard real-time hybrid simulation of a tall building with damped outriggers

Kolay, Chinmoy; Al‐Subaihawi, Safwan; Marullo, Thomas; Ricles, James M.; Quiel, Spencer E.

doi:10.1504/ijlcpe.2020.10031044

Cited by 2 publications

(2 citation statements)

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“…35 Similarly, the real-time hybrid simulation of a viscously damped outrigger system subject to wind and earthquake excitation was carried out. 36,37 These studies verified the effectiveness of damped outrigger system in reducing structural responses under lateral loadings.…”

Section: Introductionmentioning

confidence: 66%

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

Fang

2023

Journal of Low Frequency Noise, Vibration and Active Control

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This paper proposes a frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems. Based on a core–outrigger–damper–column simplified model, the global dynamic stiffness matrix is assembled from the core modeled as a Timoshenko beam, damped outriggers as complex rotational stiffness comprising outriggers, dampers, and perimeter columns, and inherent damping using Leung’s theory and modal damping construction. A general numerical method combining Wittrick-Williams algorithm and Newtonian iteration is developed to study the dynamic characteristic of such systems with multiple damped outriggers. The fast Fourier transformation (FFT) and the inverse Fourier transformation (IFFT) are then integrated with the principle of potential energy to obtain the equivalent nodal force and thus the time history response by transformations between time and frequency domains. Finally, the stochastic analysis is conducted via the transfer function resulting from the global stiffness matrix with the stochastic seismic excitation following Kanai-Tajimi spectrum. The proposed approach is verified by comparison with the finite element method through a case study of a tall building implemented with viscously damped outriggers. This study shows that the proposed analytical framework could serve as a powerful tool for evaluating the performance of viscously damped outrigger systems.

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Section: Introductionmentioning

confidence: 66%

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

Fang

2023

Journal of Low Frequency Noise, Vibration and Active Control

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“…Moreover, the intrinsic damping of the traditional outriggers system has been efectively improved. In addition, the corresponding damping efects have also been verifed with the results of real-time hybrid simulation [22,23] and shaking table test [15]. At present, DO has been successfully applied in many practical projects [24][25][26].…”

Section: Introductionmentioning

confidence: 98%

Energy Analysis of a Damped Substructure Outrigger System

Liu,

Tan,

Pan

et al. 2023

Structural Control and Health Monitoring

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A damped outrigger system (DO) has been proposed to enhance the seismic performance, in which links between outriggers and perimeter columns are artificially disconnected and implemented by dampers. Such an operation essentially destroys the structural integrity and becomes a potential threat for structural safety. Moreover, its performance is very sensitive to the stiffness of perimeter columns. In this study, a mega-sub controlled system is employed to propose a novel outrigger system, i.e., a damped substructure outrigger system (DSO). The novel system has good structural integrity due to its main structure consisting of the core tube, outrigger, and perimeter column. To present further investigation, the govern equations of DSO are derived by the simplified model which is regard as a cantilever beam system with a multirotation spring and energy dissipation substructure. Then, the energy distribution and seismic performance are parametric investigated. Finally, the damping effects of DSO are discussed. The results indicate that DSO possesses the superiority of damping performance. Compared with DO, DSO is less sensitive to perimeter column stiffness. Moreover, the proposed system can obtain the high efficiency in energy dissipation but with less damping cost than that of the viscous damper. Also, the larger stroke of the viscous damper can be found for DSO.

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Multi-hazard real-time hybrid simulation of a tall building with damped outriggers

Cited by 2 publications

References 0 publications

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

Frequency domain-based analytical framework for seismic performance of viscously damped outrigger systems based on continuous Timoshenko beam theory

Energy Analysis of a Damped Substructure Outrigger System

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