Numerical analysis of the early age behavior of concrete

Numerical analysis of the early age behavior of concrete ...

Sep 01, 2009  A numerical analysis for early age behavior is carried out using the finite element code CONSA/HS, a 3D finite element analysis program developed at Korea Advanced Institute of Science and Technology (KAIST) for hydration heat transfer, moisture diffusion, and corresponding stress analysis.

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Numerical analysis of the early age behavior of concrete ...

Numerical analysis of the early age behavior of concrete structures with a hydration based microplane model Author links open overlay panel Yun Lee a Jin-Keun Kim b 1 Show more

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Numerical analysis of the early age behavior of concrete ...

To simulate the early age behavior of concrete structures composed of young concrete, a finite element analysis (FEA) was implemented with the hydration

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Experimental and numerical analysis of early age behavior ...

Jun 20, 2019  The state-of-the-art numerical models studying early-age behavior in concrete is mainly based on the hygro-thermo-chemo-mechanical coupled framework , , , , . In the same context, the assessment of cracking risk is also considered, e.g., in de Borst and Van den Boogaard [28] and De Schutter [29] by using smeared-crack modeling; or by crack band ...

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Experimental and numerical analysis of early age behavior ...

An approach combining numerical simulations and experimental techniques is proposed to investigate the early-age properties of non-reinforced concrete. Both thermo-mechanical and fracture behaviors are studied, providing a deep insight into the hydration process. This work makes an important step in understanding the effects of hydration on the ...

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(PDF) Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures Engineering Structures, 2011 F. Benboudjema

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Early age behavior of bonded concrete overlays due to ...

Oct 01, 2000  Experimental measurements and numerical analyses were performed to investigate the early age behavior of bonded concrete overlays. Drying shrinkage, relative humidity, and thermal changes inside the overlay concrete were measured to define shrinkage and thermal gradients. Tensile bond strength was measured by a modified split tensile test and used for failure criterion in numerical

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Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures Author links open overlay panel M. Briffaut a b F. Benboudjema b J.M. Torrenti c G. Nahas a b

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(PDF) Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures Engineering Structures, 2011 F. Benboudjema

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Numerical Model Describing the Early Age Behavior of 3D ...

Jul 06, 2020  A numerical model used to predict the behavior of 3D printed concrete in the early age phase up until the point of collapse is presented. An incremental creep model for

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Early age behavior of bonded concrete overlays due to ...

Experimental measurements and numerical analyses were performed to investigate the early age behavior of bonded concrete overlays. Drying shrinkage, relative humidity, and thermal changes inside the overlay concrete were measured to define shrinkage and thermal gradients. Tensile bond strength was measured by a modified split tensile test and used for failure criterion in numerical modeling.

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Numerical analysis of effect of temperature history and ...

26 Numerical analysis of effect of temperature history and restraint degree on cracking behavior of early-age concrete Figure 1. Temperature histories of concrete specimens. A temperature stress testing machine (TSTM), which was ¿rstly developed by Springenschmid et al. (1994),

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Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures . By M BRIFFAUT, F BENBOUDJEMA, Jean Michel Torrenti and G NAHAS. Cite . BibTex; Full citation Abstract. Several tests, devoted to the study of cracking due to autogenous and drying shrinkage, exist in the ...

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Numerical Simulation on Thermomechanical Coupling Behavior ...

Nov 11, 2020  However, the large volume of concrete in connecting segments bears a high cracking risk at an early age in the life of the concrete. In this study, field measurement and numerical simulation were performed on a large-scale connecting segment with early-age concrete to investigate its thermomechanical coupling behavior.

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A Finite Element-Based Methodology for the Thermo ...

Aug 01, 2019  Concrete mechanical behavior at early age is characterized by the development of low mechanical properties and the appearance of thermal stresses generated by temperature gradients from the heating process during the cement hydration (Wang and Luan 2018).Moreover, along with the exothermal reaction, material shrinkage takes place.

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Calibration and validation of a numerical model for early ...

Numerical examples, which deal with the analysis of concrete specimens, both in adiabatic and isothermal conditions, and loaded at different ages, are presented in order to show (1) the calibration procedure of model parameters and, after that, (2) the validation of the model for early age behavior of concrete without any further change of the ...

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Effects of shrinkage and temperature in bonded concrete ...

This early age failure is mainly due to volume changes of the overlay concrete by shrinkage, thermal changes, and thermal gradients. To understand the early age behavior of bonded concrete overlays, extensive experimental measurements and numerical analysis were carried out.

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Numerical Analysis. Satisfies: QS R. Course Description: One course. C-L: see Computer Science 520; also C-L: Mathematics 565, Modeling Biological Systems. 561. Computational Sequence Biology. Satisfies: DNA RNA DNA RNA. Course Description: Introduction to algorithmic and computational issues in analysis of biological sequences: and protein ...

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ASCL

Given a model for the Galaxy, this program computes the microlensing rate in any direction. Program features include the ability to include the brightness of the lens and to compu

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Fire resistance of concrete-filled steel tube columns with ...

Experiments and numerical studies." Fire Safety Journal, 2019;104: 90-108. [6] Dai XH, Lam D. Shape effect on the behavior of axially loaded concrete filled steel tubular stub columns at elevated temperature. Journal of Constructional Steel Research, 2012; 73(73):117-127.

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Actos de conferencias: "Numerical flameless" – Grafiati

Properties of the scheme and the numerical solution (positivity, stability, consistency, monotonicity, etc.) are studied by an exhaustive numerical analysis. The first chapter of this work reports the state of the art of the field under study, justifies the need to adapt numerical methods to this type of problem, and briefly describes the ...

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(PDF) Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures Engineering Structures, 2011 F. Benboudjema

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Numerical Model Describing the Early Age Behavior of 3D ...

Jul 06, 2020  A numerical model used to predict the behavior of 3D printed concrete in the early age phase up until the point of collapse is presented. An incremental creep model for

get price

Calibration and validation of a numerical model for early ...

Numerical examples, which deal with the analysis of concrete specimens, both in adiabatic and isothermal conditions, and loaded at different ages, are presented in order to show (1) the calibration procedure of model parameters and, after that, (2) the validation of the model for early age behavior of concrete without any further change of the ...

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Numerical analysis of effect of temperature history and ...

May 23, 2020  Numerical analysis of effect of temperature history and restraint degree on cracking behavior of early-age concrete Jianda Xin State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research;Department of Structures and Materials, China Institute of Water Resources and ...

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Data-Based Modeling of Early-Age Concrete Mechanical ...

Mar 03, 2020  AbstractWhen considering the early-age behavior of massive concrete structures, ... Mechanical properties, Numerical analysis Journal of Materials in Civil Engineering. Vol. 32, Issue 3 (March 2020) ©2019 American Society of Civil Engineers. American Society of Civil Engineers. 1801 Alexander Bell Drive ...

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Identification of early-age concrete temperatures and ...

Concrete at early-ages experiences thermal deformations due to the heat generation caused by the cement hydration reactions. These deformations may lead to cracking of concrete, for which the use of numerical models in order to foresee and prevent this problem is of crucial importance. However, these numerical models must be appropriately validated by monitoring the young concrete behaviour.

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Numerical analysis of the thermal active restrained ...

Numerical analysis of the thermal active restrained shrinkage ring test to study the early age behavior of massive concrete structures . By M BRIFFAUT, F BENBOUDJEMA, Jean Michel Torrenti and G NAHAS. Cite . BibTex; Full citation Abstract. Several tests, devoted to the study of cracking due to autogenous and drying shrinkage, exist in the ...

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A Finite Element-Based Methodology for the Thermo ...

Aug 01, 2019  Concrete mechanical behavior at early age is characterized by the development of low mechanical properties and the appearance of thermal stresses generated by temperature gradients from the heating process during the cement hydration (Wang and Luan 2018).Moreover, along with the exothermal reaction, material shrinkage takes place.

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Thermo-hygro-mechanical behavior of early-age concrete ...

Jun 15, 2011  The test member was made to simulate early-age behavior of composite bridges and the actual variation of temperature was measured according to time after concrete placement. The numerically predicted temperature was compared with the measured one. The variation of RH in early-age concrete was also analyzed with measured ambient RH.

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Materials Special Issue : Numerical Analysis of Concrete ...

Dec 10, 2016  Numerical analysis of concrete is widely used when designing concrete structures, but is also used when investigating the concrete material. Various techniques have been developed to perform an analysis of concrete at different scales, and to analyze different properties, behaviors and failures, or transport mechanisms.

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Experimental and Numerical Analysis on Coupled Hygro ...

May 05, 2021  Additionally, based on the previous studies and theoretical derivations, the coupled hygro-thermo-chemo-mechanical model of early-age concrete is proposed. The predicted results calculated by the proposed model are in good agreement with the test data in

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Numerical Experimentation on Thermo-Hydro Mechanical ...

Sep 17, 2015  The study is part of the second axis of the project dealing with the concrete behavior under thermo-hydro-chemo-mechanical (THCM) loads. One of the objectives of this component was to construct some massive structures with strain restraint in order to test and validate THCM model for predicting the early-age cracking of concrete structures.

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NUMERICAL ANALYSIS TO EVALUATE THE EFFECT OF

The FEM analysis Model deals with phenomena of temperature, humidity exchange, thermal diffusion, and mechanical behavior which can take a place at the three first days followed the concrete casting, to evaluate the diameter, distance effects on the early age crack.

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(PDF) Software Agents for the Warfighter Edmund Durfee ...

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