Numerical Analysis of Multiple Discrete Cracks in Concrete Dams Using Extended Fictitious Crack Model

Shi, Zihai; Suzuki, Masaki; Nakano, Mikio

doi:10.1061/(asce)0733-9445(2003)129:3(324)

Cited by 43 publications

(18 citation statements)

References 13 publications

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“…Another example of discrete crack models applied to dams was presented by Shi et al (2003). Currently, nonlinear fracture mechanics (NLFM) is more frequently employed through the fictitious crack model proposed by Hillerborg et al (1976).…”

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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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%

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

Campos

López

Blanco

et al. 2016

J. Perform. Constr. Facil.

View full text Add to dashboard Cite

show abstract

“…When such a mode is found to be unrealistic, it will eventually be replaced by other modes as a result of readjusting the tip positions of certain cracks. The validity of this approach in searching for the true cracking mode based on the minimum load criterion has been verified with several structural problems involving multiple cracks (Shi et al 2001(Shi et al , 2003.…”

Section: Cracking Modesmentioning

confidence: 91%

“…To explain the theoretical basis of the numerical method for analyzing multiple discrete cracks, the cracking mode in association with the propagation of multiple cracks is considered (Barpi and Valente 1998;Shi et al 2003). Figures 1 and 2 illustrate two bodies containing a single crack and two arbitrary cracks.…”

Section: Cracking Modesmentioning

confidence: 99%

“…To close a crack, the disconnected dual nodes next to the tip of the crack are simply reconnected without residual deformation, while the cohesive forces previously acting at these nodes are referred to as the transient material strength of the cracked material. To cope with curvilinear crack propagation, a re-meshing scheme is employed (Shi et al 2003). For details of the computation, refer to the previous publication (Shi et al 2001).…”

Section: (A)-(d)mentioning

confidence: 99%

“…analysis of plain concrete beams, tunnel linings and concrete gravity dams with a reasonable number of cracks can be carried out as reported previously (Shi et al 2001(Shi et al , 2003, without a major computational burden.…”

Section: (A)-(d)mentioning

confidence: 99%

See 2 more Smart Citations

Discrete Modeling of Crack Interaction and Localization in Concrete Beams with Multiple Cracks

Shi

Suzuki

Ohtsu³

2004

ACT

Self Cite

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This paper presents a numerical analysis of fracture modes in a plain concrete beam with multiple discrete cracks, focusing on crack interaction and localization. It contains three parts: justification of the strategy used to solve multiple-crack problems using a discrete approach, derivation of the coefficient of interaction, and numerical studies. The coefficient of interaction is defined based on the nodal force components at the tip of a crack, and its usefulness in analyzing various cracking behaviors is demonstrated through numerical studies. Under the given loading conditions, the cracking behavior of the plain concrete beam is shown to depend on the initial configuration of notches and their sizes. It is found that the intensity of crack interaction and its effect on crack localization can vary. As the crack localization progresses, the stress concentration at the dominant crack intensifies, and the crack interaction diminishes quickly.

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Numerical Analysis of Mixed-Mode Cracking in Concrete Dams

Shi

Fracture of Nano and Engineering Materials and Structures

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Numerical Analysis of Multiple Discrete Cracks in Concrete Dams Using Extended Fictitious Crack Model

Cited by 43 publications

References 13 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

Discrete Modeling of Crack Interaction and Localization in Concrete Beams with Multiple Cracks

Numerical Analysis of Mixed-Mode Cracking in Concrete Dams

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