A model updating method with strain measurement from impact test for the safety of steel frame structures

Hyo Seon Park, Yeesock Kim, Byung Kwan Oh

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Conventional model updating methods for structures mainly use modal parameters, which are global structural responses such as natural frequency, mode shape, and modal damping obtained through vibration measurements. A model updated using those modal parameters can accurately estimate global structural responses and is used to evaluate the state of a structure. However, when using modal parameters only in model updating, a difficulty arises regarding safety assessment and response prediction of local structural members. To ensure safety of structural members, this study proposes a model updating method using the strains measured from the impact tests in structural members of steel frame in addition to modal parameters. In the model updating technique proposed in this study, error functions are set as the differences between measured and model's modal parameters and the maximum strain subject to impact force, and the functions are minimized using a multi-objective optimization algorithm. The strain responses predicted in the updated model are used in the safety assessment of structural members in steel frames. The proposed method was experimentally verified through impact hammer loading tests on a planar steel moment frame. Furthermore, the stresses obtained from the model updated with modal parameters only and the model updated by the proposed method were compared.

Original languageEnglish
Pages (from-to)220-229
Number of pages10
JournalMeasurement: Journal of the International Measurement Confederation
Volume102
DOIs
Publication statusPublished - 2017 May 1

Fingerprint

impact tests
strain measurement
Strain measurement
safety
steels
structural members
Steel
Structural members
hammers
error functions
vibration measurement
Vibration measurement
Hammers
modal response
Multiobjective optimization
resonant frequencies
Natural frequencies
Damping
damping
moments

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

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abstract = "Conventional model updating methods for structures mainly use modal parameters, which are global structural responses such as natural frequency, mode shape, and modal damping obtained through vibration measurements. A model updated using those modal parameters can accurately estimate global structural responses and is used to evaluate the state of a structure. However, when using modal parameters only in model updating, a difficulty arises regarding safety assessment and response prediction of local structural members. To ensure safety of structural members, this study proposes a model updating method using the strains measured from the impact tests in structural members of steel frame in addition to modal parameters. In the model updating technique proposed in this study, error functions are set as the differences between measured and model's modal parameters and the maximum strain subject to impact force, and the functions are minimized using a multi-objective optimization algorithm. The strain responses predicted in the updated model are used in the safety assessment of structural members in steel frames. The proposed method was experimentally verified through impact hammer loading tests on a planar steel moment frame. Furthermore, the stresses obtained from the model updated with modal parameters only and the model updated by the proposed method were compared.",
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A model updating method with strain measurement from impact test for the safety of steel frame structures. / Park, Hyo Seon; Kim, Yeesock; Oh, Byung Kwan.

In: Measurement: Journal of the International Measurement Confederation, Vol. 102, 01.05.2017, p. 220-229.

Research output: Contribution to journalArticle

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