ACE Hellas

Athens, Greece

ACE Hellas

Athens, Greece
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Mitropoulou C.C.,ACE Hellas | Kostopanagiotis C.,ACE Hellas | Kopanos M.,ACE Hellas | Ioakim D.,ACE Hellas | Lagaros N.D.,National Technical University of Athens
Structure and Infrastructure Engineering | Year: 2015

The objective of this study is to propose a life cycle cost (LCC) model able to assess the structural performance of masonry structures. For this purpose the proposed LCC model is used for assessing the structural behaviour of one unreinforced and three retrofitted masonry structures derived following three retrofit scenarios that are suitable for strengthening this type of structures. According to the proposed LCC model the exceedance probabilities required, are calculated by means of fragility analysis (FA). In particular, FA is applied to the unreinforced and retrofitted masonry structures and the limit-states' exceedance frequencies are obtained by convolving fragilities with hazard curve. Life-cycle cost analysis models are recognised as suitable for assessing the structural performance, especially when the structure is expected to be functional for a long period of time. For the needs of the study, linear time history analyses are performed over a large database of natural records. © 2015 Taylor & Francis


Mitropoulou C.C.,ACE Hellas | Kostopanagiotis C.,ACE Hellas | Kopanos M.,ACE Hellas | Ioakim D.,ACE Hellas | Lagaros N.D.,National Technical University of Athens
Structures | Year: 2016

In this work, 3D reinforced concrete (RC) and steel building structures have been considered for studying the effect of soil-structure interaction modelling on the structural fragility assessment of such structures. In particular, three foundation models were considered: fixed model where soil-structure interaction is neglected, spring model with single-node Winkler springs and pile foundation model where soil-structure interaction is simulated using beam and quadrilateral finite elements for the pile and soil numerical simulation, respectively. For the assessment of the structural performance and the influence of the various soil-structure interaction numerical simulation models, fragility analysis is applied by considering four limit-states. For the purpose of the current study 3D, low-, mid- and high-rise RC and steel buildings are studied. The test examples employed in this study were designed first according to Eurocodes 2, 3 and 8 using the SCADA Pro analysis and design software and then nonlinear static analyses were performed for developing the fragility curves. Comparing the outcome of fragility analysis it was observed that for the case of the low- and mid-rise buildings, the structural performance was not affected significantly by the foundation system. However, it was observed that the foundation system contributes considerably to the overall structural performance of the high-rise structures examined. © 2016 Elsevier B.V.

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