Jintao Cui, Dookie Kim, Ki Young Koo, Sandeep Chaudhary - Structural model updating of steel box girder bridge using modal flexibility based deflections (Vol VII, No 4)

Vilnius Gediminas Technical UniversityRiga Technical UniversityTallinn University of TechnologyBaltic Road Association

 

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2015 Impact Factor: 0.519 ©2015 Thomson Reuters, 2015 Journal Citation Report®

ISSN 1822-427X print
ISSN 1822-4288 online
 

 

 
 

"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2012, Vol VII, No 4, p. 253-260


Jintao Cui, Dookie Kim, Ki Young Koo, Sandeep Chaudhary

Structural model updating of steel box girder bridge using modal flexibility based deflections

DOI: 10.3846/bjrbe.2012.34
 
The finite element models need to be updated to simulate the actual behavior of the structures. A simplified approach has been presented in this paper for model updating of steel box girder bridge using the virtual static deflections. The approach is based on the conversion of dynamic model to static model. The deflections used for the model updating are estimated from the modal flexibility matrix which requires only a small number of lower modes for accurate estimation. An optimization process is adopted for the model updating. Dynamic tests have been performed on a two span continuous bridge for the verification of the proposed approach. It has been found that the updated numerical deflections obtained by the proposed method reasonably agree with the estimated deflections.
 
Keywords: model updating, modal flexibility, dynamic experiment, deflection, bridge.

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