Techno Press
Techno Press

Earthquakes and Structures   Volume 6, Number 1, January 2014, pages 19-43
DOI: http://dx.doi.org/10.12989/eas.2014.6.1.019
 
Risk assessment of steel and steel-concrete composite 3D buildings considering sources of uncertainty
Nikos D. Lagaros

 
Abstract     [Full Text]
    A risk assessment framework for evaluating building structures is implemented in this study. This framework allows considering sources of uncertainty both on structural capacity and seismic demand. In particular randomness on seismic load, incident angle, material properties, floor mass and structural damping are considered; in addition the choice of fibre modelling versus plastic hinge model is also considered as a source of uncertainty. The main objective of this work is to study the contribution of these sources of uncertainty on the fragilities of steel and steel-reinforced concrete composite 3D building structures. The fragility curves are expressed in the form of a two-parameter lognormal distribution where vertical statistics in conjunction with metaheuristic optimization are implemented for calculating the two parameters.
 
Key Words
    aleatory and epistemic uncertainties; fragilities; fibre and plastic hinge modelling; multicomponent incremental dynamic analysis; steel and steel-concrete composite buildings
 
Address
Nikos D. Lagaros: Institute of Structural Analysis & Antiseismic Research, Department of Structural Engineering, School of Civil Engineering, National Technical University Athens, 9, Iroon Polytechniou Str., Zografou Campus, GR-15780 Athens, Greece
 

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