Identification of yield drift deformations and evaluation of the degree of damage through the direct sensing of drift displacements

Xiang, Ping; Nishitani, Akira; Marutani, Shohei; Kodera, Kenzo; Hatada, Tomohiko; Katamura, Ryuta; Kanekawa, Kiyoshi; Takenaka, Takashi

doi:10.1002/eqe.2752

Cited by 20 publications

(19 citation statements)

References 10 publications

(22 reference statements)

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“…for different kind of structures [2]. e interstory drift is a kind of widely used deformation-based damage index [3][4][5]. Kazemi et al [6] invested the fragility of steel braced frames by incorporating new spectral shape indicators and a weighted damage index.…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Wang

2019

Advances in Civil Engineering

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Cumulative plastic strain (CPS) damage index is proposed in this study for seismic fragility analysis by integrating the force analogy method into the energy balance equation, and CPS can be defined as the ratio of the demand of plastic dissipation energy to its capacity. The cumulative plastic strain can indicate the structural damage cumulative effect under earthquakes, which makes it especially suitable to be selected as the damage index for the structural component. Threshold values of cumulative plastic strain for different performance limit state (PLS) levels are obtained through the degree of consistency of interstory drift-based fragility curves and CPS-based fragility curves. Regarding the multidimensional fragility evaluation, CPS and the floor acceleration will be selected as the quantification indices for performance limit state of the structural component and nonstructural component, respectively. The probabilistic seismic demand model (PSDM) following multivariate logarithmic normal distribution will be developed, and taking PLS uncertainty and correlation into consideration, multidimensional PLS function is constructed to identify the structural failure domain. A full-scale 2-bay 2-story frame structure for the Network for Earthquake Engineering Simulation (NEES) project is employed as the case study structure to demonstrate the proposed theory. Nonlinear dynamic time-history analysis is carried out for the structure to obtain its maximum responses under earthquakes. Consequently, the multidimensional fragility curves can be derived on the basis of CPS. Besides, the influence of PLS threshold value, engineering demand parameter (EDP) correlation, and PLS correlation on the multidimensional fragility is investigated. Results show that (1) CPS damage index can fully consider the cumulative effect of damage under earthquakes, which makes up for the deficiency of the interstory drift damage index in this aspect, (2) the multidimensional fragility framework can deal with the PLS correlation and EDP correlation simultaneously, which will generate a more precise seismic damage assessment result, and (3) multidimensional fragility is sensitive to PLS threshold values and PLS correlation parameters.

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Section: Introductionmentioning

confidence: 99%

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Wang

2019

Advances in Civil Engineering

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“…Since Yao introduced the concept of vibration control to civil engineering area in 1972, the theory and design methods have developed significantly. Scholars and engineers have proposed various strategies to attenuate vibrations to reduce injuries or casualties and economic losses that are caused by earthquakes and to guarantee the comfortable feelings of occupants under wind excitations . However, traditional controlling devices cannot meet practical requirements given the complicated environmental situations in different regions and specific requirements of projects.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical study on the performance of particle tuned mass dampers under seismic excitation

Chen

Zhang

et al. 2016

Earthq Engng Struct Dyn

145

108

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Summary A particle tuned mass damper (PTMD), which is a creative integration of a traditional tuned mass damper and an efficient particle damper in the vibration control area, is proposed. This paper presents a comprehensive study that involves experimental, analytical, and computational approaches. The vibration control effects of a PTMD that is attached to a five‐story steel frame under seismic input are investigated by a series of shaking table tests. The influence of some parameters (auxiliary mass ratio, gap clearance, mass ratio of particles to the total auxiliary mass, frequency characteristics, and amplitude level of the input) is explored, and the performance of the PTMD with/without buffered material is compared. The experimental results show that the PTMD can achieve significant damping effects under seismic excitations, and the bandwidth of the suppression frequency is expanded, showing the device's robustness and control efficiency. In addition, an approximately analytical solution that is based on the concept of an equivalent single‐particle damper is presented, and the method to determine the corresponding system parameters is introduced. A comparative study between experimental and numerical results is conducted to verify the feasibility and accuracy of this analytical model. Copyright © 2016 John Wiley & Sons, Ltd.

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“…4 As these disadvantages impact the ability to accurately monitor displacement, many instruments have been developed to monitor interstory drift directly. These include the laser-based method, 5 a laser light source and phototransistor array, 6 a light-emitting diode array and position-sensitive detector unit, [7][8][9] and consumer grade digital cameras. 10 However, these methods require professional instruments, which significantly affect the cost.…”

Section: Introductionmentioning

confidence: 99%

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

Xie

Zhao

2020

Struct Control Health Monit

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Summary When an earthquake strikes an area, unless the local infrastructure has a structural health monitoring system, it is difficult to obtain its health condition due to a lack of data. A smartphone could be competently used for many monitoring tasks to gather large amounts of data at a low cost. In this study, a smartphone is used as a sensor to obtain the interstory drift of buildings by recording a video of the ceiling with the front camera using a feature point matching algorithm. In addition, static and dynamic tests were carried out. In the static tests, the precision and error were investigated and compared with the reference sensor. In the dynamic tests, the displacement under a seismic wave was acquired by a smartphone and compared with the reference sensor, and the illumination condition was varied to test the robustness of the algorithm. The results indicated that feature point matching was suitable for calculating the displacement, and the smartphone was competent in monitoring the interstory drift during an earthquake.

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Identification of yield drift deformations and evaluation of the degree of damage through the direct sensing of drift displacements

Cited by 20 publications

References 10 publications

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Experimental and analytical study on the performance of particle tuned mass dampers under seismic excitation

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

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