Numerical investigation for the fatigue performance of reinforced concrete beams strengthened with external prestressed HFRP sheet

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dc.contributor.authorWang, Xiaomeng
dc.contributor.authorZhou, Chuwei
dc.contributor.authorAi, Jun
dc.contributor.authorPetrů, Michal
dc.contributor.authorLiu, Yao
dc.date.accessioned2020-05-06T08:55:16Z
dc.date.available2020-05-06T08:55:16Z
dc.date.issued2020-03-20
dc.description.abstractExternal FRP (Fiber Reinforced Polymer) strengthening method has been considered to be an effective way to restore or increase the capacity of RC (Reinforced Concrete) beams. This study focuses on numerical simulating the fatigue performance of HFRP (Hybrid Fiber Reinforced Polymer) strengthened RC beam. Beams are pre-cracked first, then strengthened by HFRP, and subjected to fatigue loading. The test variable is the prestress of HFRP. Stress distribution and damage development of pre-cracking, strengthening and fatigue loading process are analyzed. The user-subroutine UMAT in Abaqus is used for implementation of the constitutive models of component materials. The simulation results show good agreements with experimental data. The failure of both reference beam and strengthened beams is found caused by fatigue fracture of the longitudinal steel bar. Therefore, the stress amplitude of the longitudinal steel bar is the dominant factor of the fatigue life of RC beams. Prestressed HFRP can significantly reduce the stress magnitude of longitudinal steel bar and suppress crack propagation, thus improve the fatigue life of the strengthened RC beam. In an appropriate range, elevating prestress level can prolong fatigue life of strengthened RC beam.cs
dc.format.extent15 strancs
dc.identifier.WebofScienceResearcherIDG-6623-2013 Petrů, Michal
dc.identifier.doi10.1016/j.conbuildmat.2019.117601
dc.identifier.orcid0000-0002-7643-8450 Petrů, Michal
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154800
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0950061819330533?casa_token=nVboe79HnfsAAAAA:nkQeK8CHlaYMejrRj-1VQaYZetWDCDLIu5dQXil06yy0j0yNzpeFmTfyZpaSLy_BSmNHKw6aQQ
dc.language.isocscs
dc.publisherELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
dc.relation.ispartofCONSTRUCTION AND BUILDING MATERIALS
dc.subjectHFRP sheetcs
dc.subjectStrengtheningcs
dc.subjectRC beamscs
dc.subjectFatiguecs
dc.subjectNumerical investigationcs
dc.titleNumerical investigation for the fatigue performance of reinforced concrete beams strengthened with external prestressed HFRP sheetcs
local.article.numberUNSP 117601
local.identifier.publikace6536
local.relation.volume237
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