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Finite element model updating for structural damage detection using transmissibility data

Earthquake Engineering and Engineering Vibration 2024年第1期23卷 87-101页

作者： Ahmad Izadi akbar esfandiari Department of Maritime Engineering Amirkabir University of TechnologyTehran 15875-4413Iran

This paper presents a new finite element model updating method for estimating structural parameters and detecting structural damage location and severity based on the structural responses(output-only data).The method uses the sensitivity relation of transmissibility data through a least-squares algorithm and appropriate normalization of the extracted *** proposed transmissibility-based sensitivity equation produces a more significant number of equations than the sensitivity equations based on the frequency response function(FRF),which can estimate the structural parameters with higher *** abilities of the proposed method are assessed by using numerical data of a two-story two-bay frame model and a plate structure *** evaluating different damage cases,the number,location,and stiffness reduction of the damaged elements and the severity of the simulated damage have been accurately *** reliability and stability of the presented method against measurement and modeling errors are examined using error-contaminated *** parameter estimation results prove the method’s capabilities as an accurate model updating algorithm.

关键词： damage detection model updating output-only transmissibility sensitivity equation

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Buckling Analysis of Tapered Continuous Columns by Using Modified Buckling Mode Shapes

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Journal of Marine Science and Application 2019年第2期18卷 160-166页

作者： Sina Toosi akbar esfandiari Ahmad Rahbar Ranji Department of Ocean Engineering AmirKabir University of Technology

Elastic critical buckling load of a column depends on various parameters,such as boundary conditions,material,and crosssection *** main purpose of this work is to present a new method for investigating the buckling load of tapered columns subjected to axial *** proposed method is based on modified buckling mode shape of tapered structure and perturbation *** mode shape of the damaged structure can be expressed as a linear combination of mode shapes of the intact *** in length in piecewise form can be positive or *** method can be used for single-span and continuous *** of results with those of finite element and Timoshenko methods shows the high accuracy and efficiency of the proposed method for detecting buckling load.

关键词： Buckling analysis Tapered column.Continuous columns Finite element method Modified buckling mode shapes

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