Multiscale Homogenization Analysis of Alkali–Silica Reaction (ASR) Effect in Concrete

Rezakhani, Roozbeh; Alnaggar, Mohammed; Cusatis, Gianluca

doi:10.1016/j.eng.2019.02.007

Cited by 32 publications

(17 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The assumption of the AAR mode in the mesoscale model determines the process of gel formation and subsequent cracking. It was assumed that AAR mainly occurs on the aggregate surface in some mesoscale models [ 15 , 16 , 17 , 18 ]. Bazant and Steffens [ 19 ] proposed that the hydrated gel first fills up the micropores near the aggregate surface, and then further formations of gel accumulate the expansion pressure in the interface zone of the aggregate and cement.…”

Section: Introductionmentioning

confidence: 99%

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Wang

et al. 2022

Materials

View full text Add to dashboard Cite

The alkali–aggregate reaction (AAR) is a harmful chemical reaction that reduces the mechanical properties and weakens the durability of concrete. Different types of activated aggregates may result in various AAR modes, which affect the mechanical deterioration of concrete. In this paper, the aggregate expansion model and the gel pocket model are considered to represent the two well-recognized AAR modes. The mesoscale particle model of concrete was presented to model the AAR expansion process and the splitting tensile behavior of AAR-affected concrete. The numerical results show that different AAR modes have a great influence on the development of AAR in terms of expansion and microcracks and the deterioration of concrete specimens. The AAR mode of the gel pocket model causes slight expansion, but generates microcracks in the concrete at the early stage of AAR. This means there is difficulty in achieving early warning and timely maintenance of AAR-affected concrete structures based on the monitoring expansion. Compared with the aggregate expansion model, more severe cracking can be observed, and a greater loss of tensile strength is achieved at the same AAR expansion in the gel pocket model. AAR modes determine the subsequent reaction process and deterioration, and thus, it is necessary to develop effective detection methods and standards for large concrete projects according to different reactive aggregates.

show abstract

Section: Introductionmentioning

confidence: 99%

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Wang

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…One particularly successful meso‐scale, discrete model is the so‐called lattice discrete particle model (LDPM) formulated by Cusatis and his collaborators. Originally developed for concrete, this model was successfully used to simulate the behavior of plain concrete, 15,56–60 reinforced concrete, 61,62 fiber reinforced concrete, 63–67 and to reproduce multi‐physics phenomena such as aging, ASR, 68–72 as well as hygro‐thermal and chemical processes 73–76 . LDPM has also been used to simulate rocks 77,78 and masonry 79,80 …”

Section: Introductionmentioning

confidence: 99%

Symmetric high order microplane model for damage localization and size effect in quasi‐brittle materials

Lale

Cusatis

2021

Num Anal Meth Geomechanics

Self Cite

View full text Add to dashboard Cite

This paper presents the so‐called symmetric high‐order microplane (SYHOM) model for the simulation of damage localization and size effect in quasi‐brittle materials. Contrarily to its predecessor, the high order microplane (HOM) model, SYHOM is formulated without rotational degrees of freedom, does not require couple stresses, and solves stability issues created by the antisymmetric components of stress and high order stress tensors. Furthermore, the formulation features variable, damage‐dependent localization limiter and nonlocal characteristic length that allows reproducing correctly size and shape of the fracture process zone during the entire softening process: from crack initiation to the formation of a stress‐free fracture. The paper highlights the implementation of SYHOM via isogeometric analysis with quadratic shape functions and presents several numerical simulations to demonstrate SYHOM's ability to simulate damage evolution during softening. Finally, SYHOM is validated by simulating experimental data relevant to the size effect on structural strength of notched concrete samples.

show abstract

“…In order to capture the distress and damage development mechanisms due to ASR, Comby-Peyrot 24 , Dunant and Scrivener 21 , Cusatis et al 25 , Ishakov et al 26 , and Rezaghani et al 27 used 5 meso-scale modeling. Meso-scale models generally introduce the aggregates and the cement paste explicitly; thus, concrete is modelled as a heterogeneous material with the aim of better 7 understanding the effects of composite interactions and local damage mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Stiffness Degradation of Concrete Due to Alkali-Silica Reaction: A Computational Homogenization Approach

2020

View full text Add to dashboard Cite

show abstract

Multiscale Homogenization Analysis of Alkali–Silica Reaction (ASR) Effect in Concrete

Cited by 32 publications

References 48 publications

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Symmetric high order microplane model for damage localization and size effect in quasi‐brittle materials

Stiffness Degradation of Concrete Due to Alkali-Silica Reaction: A Computational Homogenization Approach

Contact Info

Product

Resources

About