Control performance of suspended mass pendulum with the consideration of out-of-plane vibrations

Huang, Chen; Huo, Linsheng; H, Gao; Li, Hong‐Nan

doi:10.1002/stc.2217

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…Seismic hazards pose a substantial risk to the safety of structures located in earthquake-prone regions [1,2] and can cause severe social and economic losses in densely populated cities [3,4]. After an earthquake, a rapid and accurate assessment of the true seismic damage to structures is crucial for post-disaster relief [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Earthquake‐Induced Damage Assessment for Structures by Utilizing Images from Surveillance Cameras

Zhou,

Huo,

Huang

et al. 2024

Structural Control and Health Monitoring

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Rapid and accurate structural damage assessment after an earthquake is important for efficient emergency management. The widespread application of surveillance cameras provides a new possibility for improving the efficiency of assessment. However, it is still challenging to directly assess the structural seismic damage based on videos captured by indoor surveillance cameras during earthquakes. In this study, we elaborate on the concept of estimating the structural natural frequency based on the relative pixel displacement of inter-stories. Furthermore, we propose a strategy for post-earthquake structural damage assessment that integrates the computer vision and time-frequency analysis. This approach aims to navigate the difficulties inherent in earthquake damage assessment and improve emergency responses. The relative pixel displacement between the camera and the fixed features on the floor is extracted from videos by using the Harris corner detection and Kanade–Lucas–Tomasi algorithms. The structural natural frequency is estimated using the synchroextracting transform-enhanced empirical wavelet transform. The natural frequency shift-related seismic damage index is defined and calculated for damage assessment. A shake table experiment of a small-scale steel model is conducted to verify the accuracy and feasibility of the approach, and the practicality of the proposed approach is further verified by utilizing the data from a full-scale reinforced concrete benchmark model experiment. The results demonstrate that the approach can accurately and efficiently evaluate the structural damage after an earthquake based on the video captured by surveillance cameras during the earthquake. The error of the acquired damage index is less than 0.1. We will apply more advanced algorithms in the future to alleviate this problem.

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Section: Introductionmentioning

confidence: 99%

Feasibility Study of Earthquake‐Induced Damage Assessment for Structures by Utilizing Images from Surveillance Cameras

Zhou,

Huo,

Huang

et al. 2024

Structural Control and Health Monitoring

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“…In addition, friction energy dissipation supports and pendulums can also be applied for dynamic response mitigation of transmission towers. Huang et al (2018) proposed a suspended mass pendulum that considers both in-plane and out-of-plane swing angles and conducted a detailed parametric study to verify the performance of the suspended mass pendulum in vibration control of towers. Wu et al (2022) investigated the performance of piezoelectric semi-active friction dampers in the control of a 340 m television transmission tower subjected to wind excitations.…”

Section: Introductionmentioning

confidence: 99%

Response control of a transmission tower-line system under wind excitations by electromagnetic inertial mass dampers

Song

Shan²,

Chen

et al. 2022

Advances in Structural Engineering

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Structural vibration of transmission tower-line systems under wind excitations may induce damage and even destruction of the overall system. The control of transmission towers is conducted in the past decades by dynamic absorbers and dampers. Recently, a new type of passive control device, namely electromagnetic inertial mass dampers (EIMD), has been proposed and applied in structural vibration control However, the EIMD has not yet been systematically investigated in the vibration control of power transmission towers. In this regard, the vibration control of wind-disturbed transmission towers using EIMDs is conducted. The analytical model of a real tower-line system is established in line with the Hamilton principles. The response control approach using EIMDs is proposed and the control performance of different methods is compared in both the time and frequency domain. Detailed parametric studies are carried out to examine the effects of electromagnetic damping, inertial mass, and wind load intensity on EIMD performance. The assessment of the system energy responses without and with control is also conducted. The made observations demonstrate that the application of EIMDs can significantly reduce the structural dynamic responses under wind loading and the control performance of the EIMDs is quite robust and versatile under different wind load intensities.

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“…Numerous structures have been installed with various types of vibration suppression systems to restrain their dynamic responses induced by wind, earthquake, and other dynamic actions (Cong, 2019; Giaralis and Petrini, 2017; Rahman et al, 2017; Seung-Yong, 2019; Tse et al, 2007). As a kind of passive control device, the pendulum tuned mass damper (PTMD) has been widely utilized in engineering practice (Huang et al, 2018; Sarafian, 2009; Zhang and Li, 2019) due to its high efficiency and reliability, with typical examples including the Taipei 101 Building, Sydney Chifley Tower, and Shanghai Center Tower (Chung et al, 2013; Lu and Chen, 2011; Roffel et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Equivalent linearization and parameter optimization of isochronous-pendulum tuned mass damper

Huang

Huo

2022

Advances in Structural Engineering

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The isochronous-pendulum tuned mass damper (IPTMD) with curved supports was proposed to eliminate the loss of vibration control performance induced by large swing angles in our previous study. However, the nonlinearity caused by the IPTMD leads to difficulty in its parameter optimization. To overcome this issue, an approach based on the equivalent linearization method (ELM) and genetic algorithm (GA) is proposed in this paper to facilitate the optimal design of the IPTMD. First, based on the pseudo excitation method, the nonlinear IPTMD system is equivalent to a linear one using the ELM. The numerical results demonstrate that the equivalent linearization model of the IPTMD is fairly precise to approximate the original nonlinear IPTMD. Then the optimal design based on the H∞ norm and GA is performed to compute the design parameters of the IPTMD, which can minimize the peak response of the main structure. Additionally, to evaluate the effectiveness of the proposed approach, the optimal parameters are applied to compute the dynamic response of a tall building installed with the IPTMD under different earthquakes. The numerical results reveal that the optimized IPTMD can reduce the displacement of the tall building effectively.

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Control performance of suspended mass pendulum with the consideration of out-of-plane vibrations

Cited by 10 publications

References 30 publications

Feasibility Study of Earthquake‐Induced Damage Assessment for Structures by Utilizing Images from Surveillance Cameras

Feasibility Study of Earthquake‐Induced Damage Assessment for Structures by Utilizing Images from Surveillance Cameras

Response control of a transmission tower-line system under wind excitations by electromagnetic inertial mass dampers

Equivalent linearization and parameter optimization of isochronous-pendulum tuned mass damper

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