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Composites: Mechanics, Computations, Applications: An International Journal

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ISSN Druckformat: 2152-2057

ISSN Online: 2152-2073

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00004 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.08 SJR: 0.153 SNIP: 0.178 CiteScore™:: 1 H-Index: 12

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PREDICTIVE MULTISCALE MODEL OF DELAYED DEBONDING FOR CONCRETE MEMBERS WITH ADHESIVELY BONDED EXTERNAL REINFORCEMENT

Volumen 3, Ausgabe 4, 2012, pp. 307-329
DOI: 10.1615/CompMechComputApplIntJ.v3.i4.20
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ABSTRAKT

The research described in this paper relates to flexural concrete members strengthened by means of external reinforcement bonded adhesively onto the surface, in particular, by fiber-reinforced polymeric strips, sheets, or laminates. The research is specifically devoted to external reinforcement being already in tension under a dead load or a low fraction of live load. The concrete cover exhibits initial flaws, which were unimportant when a member was not externally reinforced, but that may give rise to slow crack propagation up to delayed debonding when the member is externally reinforced. This paper presents a model for predicting the delayed debonding. The common debonding models, including code provisions, focus mainly on the structural and material scales, and thus ignore delayed failure. On the contrary, this new model focusses on the mesoscale, which considers the velocity of crack growth that leads to debonding. While on the nanoscale and microscale the crack velocity depends on the microstructure, on the mesoscale the crack velocity depends on the interfacial bond shear stresses and crack length. This dependence can be synthetized by the ratio between the mode II stress intensity factor, KII and its critical value KIIC The model describes the delayed debonding in terms of interaction between bond shear stress and time (ultimate domain maximum bond shear stress versus delayed time).

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