Normal/Shear Cracking Model: Application to Discrete Crack Analysis

Carol, Ignacio; Prat, Pere C.; López, Carlos M.

doi:10.1061/(asce)0733-9399(1997)123:8(765)

Cited by 245 publications

(241 citation statements)

References 40 publications

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“…In line with this, a convenient approach to simulate the cracks in finite element models (FEM) is using zero-thickness interface elements without thickness and with a nonlinear constitutive law that describes the cracking and allows considering the normal/shear coupling effect according to Mohr-Coulomb models. The literature reports several examples of interface laws that incorporate fracture concepts (Vonk, 1992;Stankowski et al, 1993;Carol et al 1997Carol et al , 2001), examples of application in the analysis of dams (Hohberg, 1992;Cervenka, 1994). …”

Section: Introductionmentioning

confidence: 99%

“…For that, an analysis of the previous studies and a reformulation of the hypotheses are conducted. Subsequently, a 2D finite element model is employed to reproduce the response of a block of the dam that contains the intake pipes and the turbines, including horizontal joints with a nonlinear behavior using the formulation proposed by Carol et al (1997) and the subsequent versions (Carol et al 2001, López et al 2008aIdiart, 2001a) to represent the cracks observed in the structure. This approach allows assessing the contribution of the damage and cracking on the registered movements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural Diagnosis of a Concrete Dam with Cracking and High Nonrecoverable Displacements

Campos

López

Blanco

et al. 2016

J. Perform. Constr. Facil.

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Expansions in concrete dams may be caused by chemical or physical sources; however in certain occasions the evidences observed in the dam may not be attributed to a single cause. Mequinenza is an example of a concrete dam affected by expansions and high non-recoverable displacements that cannot be explained by the most frequent pathologies. This paper presents new hypotheses that could justify such behavior by assuming the superposition of a global phenomenon of water induced expansion in concrete in the entire dam and a localized effect consisting in the opening of cracks in the construction joints located in one of the blocks. This is validated by conducting numerical analyses through 2D finite element models that consider the nonlinear behavior of the construction joints and use zero-thickness interface elements to simulate the potential cracking planes in the dam. The results confirmed the diagnosis proposed and the capability of the model to reproduce the behavior of the dam, revealing the significant contribution of the opening of the cracks to the non-recoverable displacements in the dam.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Diagnosis of a Concrete Dam with Cracking and High Nonrecoverable Displacements

Campos

López

Blanco

et al. 2016

J. Perform. Constr. Facil.

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show abstract

“…opening in mixed mode. A softening elastoplastic model for the opening-sliding mode has been proposed by Carol et al [1]. The model is Coulomb-like and uses a fracture energy based damage parameter as control variable for the yield surface contraction, however, the model lacks reversible frictional behavior.…”

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confidence: 99%

Characterization of mixed mode crack opening in concrete

2011

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In real concrete structures cracks often open in mixed mode after their initiation. To capture the direct material behavior of a mixed mode crack opening a stiff biaxial testing machine, capable of imposing both normal and shear loads on a given crack area, has been applied. The opening and sliding components of the mixed mode displacement are measured using a custom made orthogonal gauge, and the measurements are used directly as the closed loop control signals. A double notch, concrete specimen is used for the crack investigation. The tests are divided into two steps, a pure Mode I opening step, where a macro crack is initiated in the specimen followed by the mixed mode opening step. The high stiffness of the set-up together with the closed control loop ensures a stable crack initiation followed by a controllable mixed mode opening. The deep notches result in a plane crack, only influenced by material aspects such as the aggregate size and concrete strength. Despite the occurrence of a few, local, secondary cracks during the mixed mode crack opening, the results can be treated as the mixed mode material point behavior of a crack in concrete. Results are reported for a range of mixed mode angles and for varying initial Mode I openings of the crack.

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“…In order to capture the main potential crack trajectories, zero-thickness interface elements are inserted a priori of the analysis, and are equipped with a nonlinear constitutive law based on elasto-plasticity with concepts of fracture mechanics (Carol et al, 1997;Carol et al, 2001). Results of the meso-mechanical model for normal concrete specimens subject to a variety of loading cases in 2D and 3D can be found elsewhere Caballero et al, 2007;López et al, 2008).…”

Section: Mesomechanical Modelmentioning

confidence: 99%

Recent Developments in Durability Mesomechanics of Concrete, Including Cracking via Interface Elements

Liaudat¹,

Rodríguez²,

López³

et al. 2013

Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete

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The mesomechanical model for concrete previously developed for purely mechanical actions, is used as the basis for coupled durability mechanics calculations. Until now, the phenomena studied include drying shrinkage, external sulfate attack and mechanical effects of high temperatures. On-going work is focusing on alkali-silica reaction (ASR). From the chemical viewpoint, ASR is represented with a three-field diffusion-reaction chemical model, which is shown to qualitatively and quantitatively reproduce some experimental measurements of sandwich-type specimens subject to standardized accelerated ASR tests. The model developed includes the recently identified role of Calcium in this type of expansive reactions.

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Normal/Shear Cracking Model: Application to Discrete Crack Analysis

Cited by 245 publications

References 40 publications

Structural Diagnosis of a Concrete Dam with Cracking and High Nonrecoverable Displacements

Structural Diagnosis of a Concrete Dam with Cracking and High Nonrecoverable Displacements

Characterization of mixed mode crack opening in concrete

Recent Developments in Durability Mesomechanics of Concrete, Including Cracking via Interface Elements

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