Identification of critical mechanical parameters for advanced analysis of masonry arch bridges

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Title: Identification of critical mechanical parameters for advanced analysis of masonry arch bridges
Authors: Tubaldi, E
Macorini, L
Izzuddin, B
Item Type: Journal Article
Abstract: The response up to collapseof masonry arch bridges isvery complex andaffected by many uncertainties. In general,accurate response predictions can be achieved using sophisticated nu-merical descriptions,requiringa significant number of parameters that need to be properly char-acterised. This study focuses on the sensitivity of the behaviour of masonry arch bridges with respect to a wide range of mechanical parametersconsidered within a detailed modelling ap-proach.The aim is to investigate the effect of constitutive parameters variations on the stiffness and ultimate load capacityunder vertical loading.First, advanced numerical models of masonry arches and of a masonry arch bridgeare developed, wherea mesoscaleapproach describes the actual texture of masonry. Subsequently, a surrogate kriging metamodel is constructed to re-place the accurate but computationally expensive numerical descriptions,andglobal sensitivity analysisis performedto identify the mechanical parameters affectingthe most the stiffness and load capacity. Uncertainty propagationis then performed onthe surrogate modelsto estimate the probabilistic distribution of theresponse parametersof interest.The results provide useful information for risk assessment and management purposes, and shedlight on the parameters that control the bridge behaviour and require an accurate characterisation in terms of uncertainty.
Date of Acceptance: 6-May-2019
URI: http://hdl.handle.net/10044/1/72260
ISSN: 1573-2479
Publisher: Taylor & Francis (Routledge)
Journal / Book Title: Structure and Infrastructure Engineering
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 657007
Keywords: 0905 Civil Engineering
Civil Engineering
Publication Status: Accepted
Embargo Date: Embargoed for 12 months after publication date
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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