Accurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factors

dc.contributor.authorMourlas, Christos
dc.contributor.authorMarkou, George
dc.contributor.authorPapadrakakis, Manolis
dc.date.accessioned2019-01-31T10:22:51Z
dc.date.issued2019-01
dc.description.abstractAccurate nonlinear dynamic analysis of reinforced concrete structures is necessary for estimating the behavior of concrete structures during an earthquake. A realistic modeling approach to assess their strength and their ability to carry the expected seismic forces is of great importance. Although a number of constitutive models and modeling approaches have been proposed in order to capture the behavior of reinforced concrete structures under static loading conditions, only a few of these numerical models have been extended to dynamic problems. The objective of this paper is to integrate a computationally efficient 3D detailed modelling of concrete structures with damage factors that take into account the opening and closing of cracks, as well as, damage factors for steel reinforcement considering the surrounding concrete damage level, in order to capture the level of damage and stiffness degradation of structures undergoing many loading cycles. In the adopted numerical model, the concrete domain is discretized with 8-noded isoparametric hexahedral finite elements, which treat cracking with the smeared crack approach, while the steel reinforcement is modeled as embedded beam elements inside the hexahedral mesh. The validity of the proposed method is demonstrated by comparing the numerical response with the corresponding experimental results of various reinforced concrete structural members and structures. Based on the numerical investigation, it was found that the proposed integration of the damage factors with computationally efficient concrete and steel material models can efficiently predict both static and dynamic nonlinear behavior of concrete structures, with the ability to capture the complicated phenomenon of the pinching effect.en_ZA
dc.description.departmentCivil Engineeringen_ZA
dc.description.embargo2020-01-01
dc.description.librarianhj2019en_ZA
dc.description.sponsorshipThe European Research Council Advanced Grant “MASTER-Mastering the computational challenges in numerical modeling and optimum design of CNT reinforced composites” (ERC-2011-ADG 20110209).en_ZA
dc.description.urihttp://www.elsevier.com/locate/engstructen_ZA
dc.identifier.citationMourlas, C., Markou, G. & Papadrakakis, M. 2019, 'Accurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factors', Engineering Structures, vol. 178, pp. 258-285.en_ZA
dc.identifier.issn0141-0296 (print)
dc.identifier.issn1873-7323 (online)
dc.identifier.other10.1016/j.engstruct.2018.10.034
dc.identifier.urihttp://hdl.handle.net/2263/68326
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2018 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Engineering structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Engineering structures, vol. 178, pp. 258-285, 2019. doi : 10.1016/j.engstruct.2018.10.034.en_ZA
dc.subjectNonlinear dynamic analysisen_ZA
dc.subjectReinforced concreteen_ZA
dc.subjectFinite element methoden_ZA
dc.subject3D detailed modelingen_ZA
dc.subjectDamage factorsen_ZA
dc.titleAccurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factorsen_ZA
dc.typePostprint Articleen_ZA

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