Updated empirical vulnerability model considering the seismic damage of typical structures

Li, Si-Qi; Formisano, Antonio

doi:10.1007/s10518-023-01814-8

Cited by 18 publications

(2 citation statements)

References 55 publications

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“…According to (9), an energy-concentrated, timefrequency representation can be obtained, and the frequency boundaries between diferent modes can be determined. Te fltering boundaries for each single-mode signal in the EWT can be defned by an interval…”

Section: Structural Control and Health Monitoringmentioning

confidence: 99%

“…Te seismic fragility and vulnerability models are often used to evaluate the probabilistic seismic risk of structures [8]. To improve the accuracy of prediction, an updated empirical model for structural seismic vulnerability assessment was proposed using the survey data obtained from the Yushu earthquake [9]. Additionally, as an alternative to the traditional seismic vulnerability model, a surrogate model based on an artifcial neural network was also investigated [10].…”

Section: Introductionmentioning

confidence: 99%

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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: Structural Control and Health Monitoringmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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The influence of torsion on acceleration demands in low-rise RC buildings

Ruggieri,

Vukobratović

2024

Bull Earthquake Eng

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This paper presents a study of acceleration demands in low-rise reinforced concrete (RC) buildings with torsion, evaluated by quantifying peak floor accelerations (PFAs) and floor response (acceleration) spectra (FRS). The study was performed with the aim to provide simple empirical formulas to quantify the amplification effects due to torsion, which can occur in most of the existing and new RC buildings. With this goal in mind, a set of eight archetype buildings was selected, characterized by an increasing floor eccentricity obtained by moving the centre of rigidity (CR) away from the centre of mass (CM). Numerical models of the proposed set of archetype RC buildings were considered in both linear elastic and nonlinear configurations. For the latter, the properties of models were widely varied, by systematically modifying parameters of plastic hinges, in order to obtain a sample of 1000 models. Non-structural components (NSCs) were considered linear elastic in all cases. To investigate acceleration demands, a set of forty Eurocode 8 spectrum-compatible ground motion records were used as input. For linear elastic building models, it was observed that the change of demands depends on the position of the NSC (in-plan and in-height), and on the distance between CR and CM. On the other hand, for nonlinear models, additional parameters must be considered, such as the building ductility (μ) and yielding force (Vy). New regression models were proposed for quantifying the observed differences in PFAs and FRS when torsion occurs. The efficiency of the proposed models was assessed by testing the new formulas on an existing case study building, as well as on the well-known SPEAR building.

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Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

Li,

Han

et al. 2024

Bull Earthquake Eng

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Updated empirical vulnerability model considering the seismic damage of typical structures

Cited by 18 publications

References 55 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

The influence of torsion on acceleration demands in low-rise RC buildings

Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

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