Continuous and Discontinuous Modelling of Fracture in Concrete Using FEM

Tejchman, J.; Bobiński, Jerzy

doi:10.1007/978-3-642-28463-2

Cited by 44 publications

(40 citation statements)

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“…The advantage of meso-scale modelling is the fact that it directly simulates micro-structure and can be used to comprehensively study local phenomena at the micro-level such as the mechanism of the initiation, growth and formation of localized zones and cracks which affect the macroscopic concrete behaviour (the concrete behaviour at the meso-scale fully determines the macroscopic non-linear behaviour). The mesoscopic results allow also for a better calibration of continuous and discontinuous constitutive continuum models and an optimization design of concrete with enhanced both strength and ductility [3,21]. Discrete models (if they are enough consistent) might progressively replace experimental tests to study the influence of concrete meso-structure (aggregates size, aggregate shape, aggregate roughness, aggregate/mortar volume, macro porosity, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…in concrete from the few nanometres (hydrated cement) to the millimetres (aggregate particles). In order to properly describe fracture in detail, material micro-structure has to be taken into account since its effect on the global results is pronounced [3]. The understanding of a fracture process is of major importance to ensure the safety of the structure and to optimize the material behaviour.…”

Section: Introductionmentioning

confidence: 99%

“…Fracture is a fundamental phenomenon in concrete material [1][2][3]. It is very complex since it consists of main cracks with various branches, secondary cracks and micro-cracks [1].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of concrete fracture at aggregate level using FEM and DEM based on X-ray μCT images of internal structure

Skarżyński

Nitka

Tejchman

2015

Engineering Fracture Mechanics

160

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modelling of concrete fracture at aggregate level using FEM and DEM based on X-ray μCT images of internal structure

Skarżyński

Nitka

Tejchman

2015

Engineering Fracture Mechanics

160

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“…For representation in the numerical analyses of the behaviour of beams subjected to operating loads, it was necessary to describe the stress-strain relationship for the concrete in compression and tension [38] and the steel.…”

Section: Materials Modelsmentioning

confidence: 99%

Experimental and numerical studies of continuous composite beams taking into consideration slab cracking

Śledziewski¹

2016

EiN

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IntroductionSpecial requirements with regard to the theory of composite structures and their creative shaping make them one of the most interesting solutions for load-carrying structures in the construction technology. The constituent parts of the cross section are made of materials with different Young's moduli, which interact with each other through the use of fasteners. These elements are joined to maximise both their strength properties and operating characteristics with respect to their location within the feature.The greatest benefits are currently visible in the application of steel-concrete composite structures [24]. These are mainly used in bridge construction but are also used in other areas of the construction industry, especially in the industrial construction [16].The importance of the issue of cracking in the context of continuous composite structures is still a topic of discussion. Although the structure safety is not compromised in any way, its operating lifespan is significantly affected. Non-structural cracks can cause damage to insulation and -in the long -cause corrosion of the reinforcement, as well. Therefore, it must be remembered that the operating lifespan of the structure is one of the basic assumptions in the design process and it significantly affects the adopted design solutions and materials [26]. The feature's operating lifespan is maintained when the structure fulfils its function within a given time both for its load-bearing capacity (ultimate limit states) and serviceability (limit states related to the reduction of cracks, stresses and deflections). The correct structure design ensures that it is fit for purpose for at least the period of expected operating lifespan. The requirements for the bridge structure operating lifespan are particularly high, though. In accordance with [26], bridges are classified as the S5 design category (class), which means the approximate design lifetime of at least 100 years.Nowadays, in order to meet the increasingly stringent operating lifespan criteria, the design phase for composite bridges should take into account non-structural concrete cracking and the change of its stiffness between the cracks Eksploatacja i NiEzawodNosc -MaiNtENaNcE aNd REliability Vol.18, No. 4, 2016 579 sciENcE aNd tEchNology 579[28] in the ultimate limit state and serviceability limit state. Concrete cracking affects the stiffness of the composite section and can cause an overload of the steel section. The change in the stiffness causes redistribution of excessive bending moments along the length of the continuous beam. The problem of the behaviour of the composite structure with the cracked concrete slab is complicated and not fully explored. For this reason, the stiffness of the concrete in tension in often overlooked in the design of civil engineering structures. This approach leads to an irrational assessment of the load-bearing capacity and serviceability of the composite structure, which causes a reduction in the lifetime of the feature [36].This problem also occur...

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“…Later these micro-cracks create macro-cracks. Thus, a fracture process is subdivided in general into two main stages: appearance of narrow regions of intense strain deformation with a certain volume (including micro-cracks) and occurrence of discrete macro-cracks [2]. Within continuum mechanics, strain localization can be numerically captured by a continuous approach and discrete macro-cracks by a discontinuous one.…”

Section: Introductionmentioning

confidence: 99%

Computational modelling of concrete behaviour under static and dynamic conditions

Marzec¹,

Tejchman²

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The paper presents results of FE simulations of the concrete behaviour under quasi-static and dynamic loading. For quasi-static cyclic analyses, an enhanced coupled elasto-plastic-damage constitutive model has been used. To take the effect of the loading velocity into account, viscous and inertial terms have been also included. To ensure the mesh-independence and to properly reproduce strain localization in the entire range of strain rates, a constitutive formulation has been enhanced by a characteristic length of micro-structure by means of a non-local theory. Numerical results have been compared with some corresponding laboratory tests.

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Continuous and Discontinuous Modelling of Fracture in Concrete Using FEM

Cited by 44 publications

References 0 publications

Modelling of concrete fracture at aggregate level using FEM and DEM based on X-ray μCT images of internal structure

Modelling of concrete fracture at aggregate level using FEM and DEM based on X-ray μCT images of internal structure

Experimental and numerical studies of continuous composite beams taking into consideration slab cracking

Computational modelling of concrete behaviour under static and dynamic conditions

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