A simple approach to integration of acceleration data for dynamic soil–structure interaction analysis

Yang, Jie; Li, J.B.; Lin, Gao

doi:10.1016/j.soildyn.2005.12.011

Cited by 131 publications

(68 citation statements)

References 10 publications

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“…This method is frequently used in strong-motion earthquake research to acquire the structure displacement from ground motion acceleration. It is widely recognised that velocity results cannot be obtained by simple integration without pre-processing of the acceleration data (Boore, 2005, Yang et al, 2006, Stiros, 2008, Chen et al, 2010. Direct integration of acceleration records often causes unrealistic drifts in displacements and velocities (Yang et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Preliminary investigation of the tsunami-borne debris impact on structures: a new method for impact force measurement

Shafiei¹,

Melville²,

Beskhyroun³

et al. 2014

Hydraulic Structures and Society - Engineering Challenges and Extremes

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Section: Resultsmentioning

confidence: 99%

Preliminary investigation of the tsunami-borne debris impact on structures: a new method for impact force measurement

Shafiei¹,

Melville²,

Beskhyroun³

et al. 2014

Hydraulic Structures and Society - Engineering Challenges and Extremes

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“…Chiu (1997) discusses different sources of errors that can be identified to explain the drifts in velocities and displacements computed by directly integrating raw acceleration records, including digitisation errors, low-frequency instrument noise, low-frequency background noise and mechanical or electrical hysteresis in a sensor. Baseline errors in particular have been shown to cause severe drifts if appropriate pre-processing schemes are not adopted (Yang et al, 2006). In fact, although the shifts in the baseline (zero level) are negligible in the acceleration signal, they may have a dramatic impact in computing the corresponding velocity and displacement waveforms.…”

Section: Methodsmentioning

confidence: 99%

Seismic damage detection for a steel braced frame structure

McCrum¹,

Staino²

2015

Proceedings of the ICE - Structures and Buildings

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A new approach for global detection of seismic damage in a single-storey steel concentrically braced frame (CBF) structure is presented. The filtered lateral in-plane acceleration response of the CBF structure is integrated twice to provide the lateral in-plane displacement that is used to infer buckling and yielding damage. The level of interstorey drift of the CBF during a seismic excitation allows the yield and buckling of the bracing members to be identified and indirectly detects damage based on exceedance of calculated lateral in-plane displacement limits. A band-pass filter removes noise from the acceleration signal followed by baseline correction being used to reduce the drift in velocity and displacement during numerical integration. This pre-processing results in reliable numerical integration of the frame acceleration that predicts the displacement response accurately when compared to the measured lateral displacement of the CBF structure. Importantly, the structural damage is not assumed through removal of bracing members, rather damage is induced through actual seismic loading. The buckling and yielding displacement threshold limits used to identify damage are demonstrated to identify accurately the initiation of buckling and yielding.

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“…An established process of quantitatively estimating the trend of outcomes, also known as curve-fitting, therefore becomes necessary [2]. The best-fitting curve can be obtained by the method of least squares [48]. The method of least squares assumes that the best-fitting curve of a given type is the curve that has the minimal sum of the deviations squared (least square error) from a given set of data.…”

Section: Parameter Extractionmentioning

confidence: 99%

Movement analysis by accelerometry of newborns and infants for the early detection of movement disorders due to infantile cerebral palsy

Heinze

Hesels

Breitbach-Faller

et al. 2010

Med Biol Eng Comput

102

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So far, developed diagnostic strategies for the early detection of movement disorders due to infantile cerebral palsy (ICP) in newborns are not easily applicable in clinical settings. They are either difficult to acquire or they are too expensive to be established in pediatric clinics and are not sufficiently usable to be integrated into daily routine. The aim of this study therefore was to develop a methodology that allows the objective diagnosis of developing movement disorders in newborns due to ICP. It should be applicable to pediatric offices and should easily integrate in daily routine. To achieve this, a simple to use and low-cost system based on accelerometers was developed to evaluate the newborn's movement. Afterward, a classificator based on a decision tree algorithm was implemented to differentiate between healthy and pathological data in order to propose the most likely diagnosis. The developed methodology was validated in a clinical study with 19 healthy and 4 affected subjects that were evaluated at the first, third and fifths month after birth (corrected age). The overall detection rate of the developed methodology reached between 88 and 92% for all evaluated measurements. The developed methodology is simple to use, therefore is applicable for the objective diagnosis of developing movement disorders in newborns due to ICP and can be established in pediatric offices for use in daily routine.

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A simple approach to integration of acceleration data for dynamic soil–structure interaction analysis

Cited by 131 publications

References 10 publications

Preliminary investigation of the tsunami-borne debris impact on structures: a new method for impact force measurement

Preliminary investigation of the tsunami-borne debris impact on structures: a new method for impact force measurement

Seismic damage detection for a steel braced frame structure

Movement analysis by accelerometry of newborns and infants for the early detection of movement disorders due to infantile cerebral palsy

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