Boundary condition identification for a grid model by experimental and numerical dynamic analysis

Qiang Mao, John Devitis, Matteo Mazzotti, Ivan Bartoli, Franklin Moon, Kurt Sjoblom, Emin Aktan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

There is a growing need to characterize unknown foundations and assess substructures in existing bridges. It is becoming an important issue for the serviceability and safety of bridges as well as for the possibility of partial reuse of existing infrastructures. Within this broader contest, this paper investigates the possibility of identifying, locating and quantifying changes of boundary conditions, by leveraging a simply supported grid structure with a composite deck. Multi-reference impact tests are operated for the grid model and modification of one supporting bearing is done by replacing a steel cylindrical roller with a roller of compliant material. Impact based modal analysis provide global modal parameters such as damped natural frequencies, mode shapes and flexibility matrix that are used as indicators of boundary condition changes. An updating process combining a hybrid optimization algorithm and the finite element software suit ABAQUS is presented in this paper. The updated ABAQUS model of the grid that simulates the supporting bearing with springs is used to detect and quantify the change of the boundary conditions.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015
EditorsPeter J. Shull
PublisherSPIE
ISBN (Electronic)9781628415407
DOIs
StatePublished - Jan 1 2015
Externally publishedYes
EventStructural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015 - San Diego, United States
Duration: Mar 9 2015Mar 12 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9437
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherStructural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015
CountryUnited States
CitySan Diego
Period3/9/153/12/15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • Finite Element Model Updating
  • Modal Analysis
  • Structural Identification

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