Statistical screening of individual and joint effect of several modelling factors on the dynamic finite element response of a railway bridge

Authors:
Johan Wiberg;Raid Karoumi;Costin Pacoste
Affiliations:
Royal Institute of Technology (KTH), Department of Civil and Architectural Engineering, SE-100 44 Stockholm, Sweden;Royal Institute of Technology (KTH), Department of Civil and Architectural Engineering, SE-100 44 Stockholm, Sweden;Royal Institute of Technology (KTH), Department of Civil and Architectural Engineering, SE-100 44 Stockholm, Sweden
Venue:
Computers and Structures
Year:
2012

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Abstract

More accurate dynamic analysis of bridges is preferred instead of using the dynamic amplification factors in design codes to estimate the dynamic load effects. Additionally, the potentials of statistical methods are often overlooked and seldom used among structural engineers. In this paper, factorial experimentation in simulating railway bridge dynamics was exemplified by screening the individual and joint effect of several modelling factors. The statistical theory proved to be relevant and meaningful, easy to implement but still very powerful. The concept of factorial experimentation was believed to provide the engineer with important indications of the effects of several possible updating parameters.