Approaches of concrete creep using mesomechanics: numerical simulation and predictive model

Wang, Yifan; Xu, Qiang; Chen, Sheng‐Hong

doi:10.1088/1361-651x/ab1f43

Cited by 13 publications

(2 citation statements)

References 56 publications

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“…For example, φ was usually set as 1.0 (Chen and Xiao 2012), 2.0 (Liu and Weyers 1998;Guzmán et al 2012), 2.35 (El Maaddawy andSoudki 2007) and 3.0 (Zhao and Jin 2006), while Lu et al (2011) proposed an opinion that the values of φ would be 0 and 2 for short and long time corrosion test, respectively. However, all of these models ignored the time-variant nature of concrete creep behavior in the corrosion process (Wang et al 2019).…”

Section: Long Time Property Of Concrete (Creep Coefficient φ)mentioning

confidence: 99%

Uncertain Factors Relating to the Prediction of Corrosion-induced Cracking of Concrete Cover

Liang

Wang

2020

ACT

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Rebar corrosion is a main cause affecting the durability and safety of reinforced concrete structures. Many mathematical models (empirical and analytical models) have been proposed to predict the corrosion-induced cracking of concrete cover over the recent decades. These models have differences in many aspects, such as constitutive laws for cracked concrete. However, each of them claimed that it could well agree with the test data. This may be due to the fact that a small amount of test data were used to verify their models. Besides, there are many uncertain factors such as the rust volumetric expansion factor and elastic modulus relating to these predictive models, which seriously weaken their effectiveness and accuracy. Thus, in this paper, the predictive performances of various mathematical models are tested by collecting an amount of test data. After that, the uncertain factors are summarized, and the reasons are analyzed though reviewing relevant knowledge in various literature. It is found that different performances are obtained for different mathematical models and test data. These uncertain factors involve many fields, such as electro-chemical factors (corrosion current density, corrosion current efficiency, corrosion rate, loading effect of corrosion current), rust properties (rust volumetric expansion factor, rust elastic modulus), long-term behavior of concrete (creep coefficient), rust penetration into concrete (amount of rust penetrated into concrete pores and cracks) and corrosion morphology. These uncertain factors are raised due to either the limit of experimental techniques, the discrepancy of parameter values, time-dependent properties, or the lack of detailed environmental information. In addition, other factors are too complex to be delicately taken into account, which have to be ignored in the predictive models. Through parameter analysis, it is found that these factors have large effects on cracking time of concrete cover. Prospective modifications of these factors are suggested, and more detailed and systematic tests should be carried out by using novel and sophisticated apparatuses in future.

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Section: Long Time Property Of Concrete (Creep Coefficient φ)mentioning

confidence: 99%

Uncertain Factors Relating to the Prediction of Corrosion-induced Cracking of Concrete Cover

Liang

Wang

2020

ACT

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“…Over the past several decades, several 2D and 3D numerical studies have focused on the performance of the ITZ on mesoscale. Wang et al [29] used a stochastic finite element model (SFEM) to evaluate the effect of creep on the behavior of concrete. Zhou and Hao [30] conducted indoor experiments and also used an SFEM to evaluate the elastic modulus of the ITZ for concrete, including recycled concrete.…”

Section: Introductionmentioning

confidence: 99%

A 3D FEM Mesoscale Numerical Analysis of Concrete Tensile Strength Behaviour

Guo

2021

Advances in Materials Science and Engineering

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A three-dimensional (3D) finite element method (FEM) based on an inserted cohesive element numerical analysis procedure was developed for concrete mesoscale systems on the ABAQUS platform with python scripts. Aggregates were generated based on dividing the existing geometrical element algorithms to randomize arbitrary spheres. Simultaneously, randomizations of the maximum aggregate size and uniform distributions of aggregate particles were also considered. An FEM for the mortar phase in concrete mesoscale systems was generated along with the interfacial transition zone (ITZ) by inserting a cohesive element. Numerical parameter analyses were performed for nine different concrete systems by varying the coarse aggregate volume fraction (α) and the ITZ tension strength (ITZ-S). The mechanical performance of concrete systems with the coupling effects of α and ITZ-S was evaluated for simulated tensile loading. The results of the numerical simulations for mechanical properties, such as the simulated tensile strengths and tension damage behaviour of concrete systems, were verified with experimental results. The proposed aggregate and ITZ generation approach and numerical simulation procedure can be used by researchers to better understand how aggregate volume fraction and ITZ strength affect the tensile behaviour of concrete mesoscale systems.

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Introduction

Chen

2023

Springer Tracts in Civil Engineering

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Approaches of concrete creep using mesomechanics: numerical simulation and predictive model

Cited by 13 publications

References 56 publications

Uncertain Factors Relating to the Prediction of Corrosion-induced Cracking of Concrete Cover

Uncertain Factors Relating to the Prediction of Corrosion-induced Cracking of Concrete Cover

A 3D FEM Mesoscale Numerical Analysis of Concrete Tensile Strength Behaviour

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