A cohesive FE model for simulating the cracking/debonding pattern of composite NSC-HPFRC/UHPFRC members

Savino, Vincenzo (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Lanzoni, Luca (DIEF-Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, Italy) ; Tarantino, Angelo Marcello (DIEF-Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Modena, Italy) ; Viviani, Marco (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

The aim of this work is to propose to practitioners a simple cohesive Finite-Element (FE) model able to simulate the cracking/debonding pattern of retrofitted concrete elements, in particular Normal-Strength-Concrete members (slabs, bridge decks, pavements) rehabilitated by applying a layer of High-Performance or Ultra-High-Performance Fiber-Reinforced-Concrete as overlay. The interface was modeled with a proper nonlinear cohesive law which couples mode I (tension-crack) with mode II (shear-slip) behaviors. The input parameters of the FE simulation were provided by a new bond test which reproduces a realistic condition of cracking/debonding pattern. The FE simulations were accomplished by varying the overlay materials and the moisture levels of the substrate surface prior to overlay, since findings about their influence on the bond performances are still controversial. The proposed FE model proved to effectively predict the bond failure of composite NSC-HPFRC/UHPFRC members.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
insit - Institut d’ingénierie du territoire
Date:
2020-10
Pagination:
29 p.
Published in:
Construction and Building Materials
Numeration (vol. no.):
2020, vol. 258, article no. 119516
DOI:
ISSN:
0950-0618
Appears in Collection:

Note: The file is under embargo until: 2022-10-31


 Record created 2020-06-02, last modified 2020-06-11

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