Seismic fracture analysis of concrete gravity dams based on nonlinear fracture mechanics

Guanglun, Wang; Pekau, O. A.; Zhang, Chuhan; Wang, Shaomin

doi:10.1016/s0013-7944(99)00104-6

Cited by 95 publications

(34 citation statements)

References 8 publications

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“…By comparing the results with other researchers it shows a fairly good agreement between this study and the others references: (Guanglun et al, 2000), (Calayir and Karaton, 2005), (Cai et al, 2008), (Hal, 1988), (Saini and Krishna, 1974), and therefore the philosophy of the nonlinear fracture mechanics criteria and smeared crack models at proper seismic behavior of concrete gravity dam seems to be confirmed. The obtained results of the analysis of Koyna dam considering interaction between dam and reservoir shows there are three vulnerable points: dam heels, changing areas of slope and some areas in upper part in which there are most of the crack elements.…”

Section: Resultssupporting

confidence: 88%

Fracture analysis of concrete gravity dam under earthquake induced loads

Mansouri¹,

Neshaei²,

Aghajany³

2011

Journal of Applied Sciences and Environmental Management

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ABSTRACT:In this paper, seismic fracture behavior of the concrete gravity dam using finite element (2D) theory has been studied.Bazant model which is non-linear fracture mechanics criteria as a measure of growth and smeared crack was chosen to develop profiles of the crack. Behavior of stress -strain curves of concrete as a simplified two-line, dam and reservoir system using the formulation of the Euler -Lagrange was chosen. According to the above models, Koyna concrete gravity dam were investigated by the 1967 earthquake record. The results provide profiles of growth and expansion first with the effects of reservoir and second without it. Comparison of the obtained results shows good agreement with the works of the other researchers. @ JASEM Keywords: Seismic fracture; Smeared crack; Non-linear fracture mechanics; Concrete gravity dam.The seismic behavior of concrete dams has been the subject of extensive research during the past decade concerning dam safety during earthquakes. Chopra et al (1972), studies seismic behavior of dam's crack path by using linear elastic analysis. The analysis shows, places that are in damage or and risk of the concerning stability of structure. Pal (1976) was the first researcher who examined Koyna dam by using non-linear analysis. In this research, assuming no effect of reservoir, being rigid foundation, smeared crack model use for crack expansion and strength criteria to crack growth, Koyna dam was analyzed and was shown that the results of material properties and element size are very sensitive. Figure 1(a) crack zone in the dam of which resulting from this analysis are shown. Skrikerud (1986) studied concrete dams through a case study on Koyna dam and by employing discrete crack for crack growth and strength criteria for crack expansion. In their study the growth of crack at each step of growth, the length of the crack tip element was considered that this is the final results were effective. He interpreted the results of their model, due to expansion mismatch with the cracking in their analysis of real crack in the dam, no match Foundation and reservoir interaction and lack of real values of characteristic parameters dam announced. Crack profiles from the analysis left in Figure 1(b) are presented. El-Aidi and Hall (1989) did a research on seismic fracture of Pine flat dam. Smeared crack model and strength criteria for crack expansion and growth were used. In their analysis is considering the reservoir -dam and foundation -dam interaction was crack profile presented. Figure 1(c), cracking in the dam will provide analysis. Fenves and Vargas-Loli also studied Pine flat dam by using fracture mechanics criteria for crack growth and smeared crack model to crack expand (Uang and Bertero, 1990). They apply different coefficients of Taft earthquake record, regardless of the effect by foundation; Pine Flat dam in two cases with and without the effect of the reservoir was analyzed. In this study the effect of hydrodynamic pressure on the seismic behavior in the dam with the crack profile...

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Section: Resultssupporting

confidence: 88%

Fracture analysis of concrete gravity dam under earthquake induced loads

Mansouri¹,

Neshaei²,

Aghajany³

2011

Journal of Applied Sciences and Environmental Management

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“…They studied in detail tension damage in the dam and noted that damage in compression is less important in comparison with damage in tension for dams. Guanglun et al [12] used a numerical scheme based on non-linear crack band theory for tension cracks to investigate the seismic fracture behavior of Koyna dam under the Koyna earthquake accelerograms. This study does not take into account the dynamic interaction of dam-reservoir system, only including the static water pressures of reservoir.…”

Section: Introductionmentioning

confidence: 99%

Seismic fracture analysis of concrete gravity dams including dam–reservoir interaction

Calayır

Karaton

2005

Computers & Structures

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“…The developed method was used in non-linear seismic analysis of concrete dams in two-dimensional space [27]. Wang et al [28] used the smeared crack model developed in Reference [15]. However, the model has re-meshing capability in the crack tip such that the resulting elements have boundaries parallel to the crack proÿle [28].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al [28] used the smeared crack model developed in Reference [15]. However, the model has re-meshing capability in the crack tip such that the resulting elements have boundaries parallel to the crack proÿle [28]. It was found that the proposed algorithm leads to more localized and more real crack proÿles in two-dimensional problems.…”

Section: Introductionmentioning

confidence: 99%

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

Mirzabozorg

Ghaemian

2004

Earthq Engng Struct Dyn

104

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SUMMARYA smeared crack approach has been proposed to model the static and dynamic behavior of mass concrete in three-dimensional space. The proposed model simulates the tensile fracture on the mass concrete and contains pre-softening behavior, softening initiation, fracture energy conservation and strain rate e ects under dynamic loads. The validity of the proposed model has been checked using the available experimental results under static and dynamic loads. The direct and indirect displacement control algorithms have been employed under incremental increasing static loads. It was found that the proposed model gives excellent results and crack proÿles when compared with the available data under static loads. The Koyna Dam in India has been used to verify the dynamic behavior of the proposed model. It was found that the resulting crack proÿles were in good agreement with the available experimental results. Finally, the Morrow Point Dam was analyzed, including the dam-reservoir interaction e ects, to consider its non-linear seismic behavior. It was found that the resulting crack proÿles were in good agreement with the contour of maximum principal stresses and no numerical instability occurred during the analysis.

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Seismic fracture analysis of concrete gravity dams based on nonlinear fracture mechanics

Cited by 95 publications

References 8 publications

Fracture analysis of concrete gravity dam under earthquake induced loads

Fracture analysis of concrete gravity dam under earthquake induced loads

Seismic fracture analysis of concrete gravity dams including dam–reservoir interaction

Non‐linear behavior of mass concrete in three‐dimensional problems using a smeared crack approach

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