Failure analysis method of concrete arch dam based on elastic strain energy criterion

Bo, Chen; Gu, Chongshi; Bao, Tengfei; Wu, Bangbin; Su, Huaizhi

doi:10.1016/j.engfailanal.2015.11.045

Cited by 26 publications

(9 citation statements)

References 14 publications

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“…The results confirm that the instable failure of high arch dams is mainly caused by the existing defects in the base or near the foundation surface, which cause stress concentration at certain areas of dam body and foundation, especially at the upstream dam heel and weak structure surface of the base, thereby leading to local yielding as well as cracking and then gradually extending and resulting in the global instable failure [18]. An extreme point on the stress-strain curve exists; hence, the following instability criteria can be adopted [11]:…”

Section: Failure Criterion Of Dam Abutment Instabilitysupporting

confidence: 57%

Uncertainty Instability Risk Analysis of High Concrete Arch Dam Abutments

Cao

Zhao

2017

Mathematical Problems in Engineering

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The uncertainties associated with concrete arch dams rise with the increased height of dams. Given the uncertainties associated with influencing factors, the stability of high arch dam abutments as a fuzzy random event was studied. In addition, given the randomness and fuzziness of calculation parameters as well as the failure criterion, hazard point and hazard surface uncertainty instability risk ratio models were proposed for high arch dam abutments on the basis of credibility theory. The uncertainty instability failure criterion was derived through the analysis of the progressive instability failure process on the basis of Shannon's entropy theory. The uncertainties associated with influencing factors were quantized by probability or possibility distribution assignments. Gaussian random theory was used to generate random realizations for influence factors with spatial variability. The uncertainty stability analysis method was proposed by combining the finite element analysis and the limit equilibrium method. The instability risk ratio was calculated using the Monte Carlo simulation method and fuzzy random postprocessing. Results corroborate that the modeling approach is sound and that the calculation method is feasible.

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Section: Failure Criterion Of Dam Abutment Instabilitysupporting

confidence: 57%

Uncertainty Instability Risk Analysis of High Concrete Arch Dam Abutments

Cao

Zhao

2017

Mathematical Problems in Engineering

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“…For example, the downstream movement of a dam due to high reservoir water pressure must be analyzed to determine whether the movement is distributed uniformly along or in the dam, the foundation, or both, and to assess whether the movement is increasing, decreasing, or stable. Such information can be used to determine proper corrective measurements (Manake and Kulkarni 2002;Chen et al 2016;Kan and Taiebat 2016).…”

Section: Introductionmentioning

confidence: 99%

Monitoring the deformation and strain analysis on the Ataturk Dam, Turkey

Yavaşoğlu

Kalkan

Tiryakioğlu

et al. 2017

Geomatics, Natural Hazards and Risk

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Every man-made structure creates certain risks -dams are no exception. Most failures in man-made structures that have occurred could have been avoided if the structures' behaviour had been inspected, monitored, and analyzed continuously, and if proper corrective measures had been taken in a timely fashion. The DSI (The General Directorate of State Hydraulic Works), which is the institution responsible for dam safety, has long used surveying methods to measure the displacements of geodetic points as a part of dam monitoring policy. In this study, we focus on the dam's mechanical behaviour throughout a time period of more than 10 years. These study results have been derived from a separate, ongoing project that has monitored deformation on the Ataturk Dam and is now determining the water level of the reservoir. The project results show that although the dam body has become more stable and the water load behind the dam has increased, the rate of displacement of the dam has declined significantly. From these results, it can be seen that the reservoir water level can be increased evenly over time and that 542 m is the maximum water level of the dam's reservoir.

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“…Calculation methods for the elastic strain energy of rocks without gas rock were more than those for gas-containing coal rocks [6], [7], [8], [9], [10]. The classical rock energy impact index method was widely used.…”

Section: State Of the Artmentioning

confidence: 99%

Elastic Strain Energy Stored in Gas - Containing Coal Rock

Hu¹,

Yin²,

Xie³

2016

JESTR

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The limitations of the commonly used elastic strain energy calculation method were theoretically analyzed in this study to explore the scientific method for calculating the elastic strain energy released when gas-containing coal rock was broken by considering the differences in the mechanical characteristics of hard rock and gas-containing coal rock. A novel method was proposed based on the dilatancy mechanical properties of gas-containing coal rock. The elastic strain energy of gas-containing coal rock was calculated according to the area formed by the stress-volume strain curve and the horizontal axis, with the dilatancy critical point as the boundary. The cyclic loading and unloading test for gas-containing coal rock was performed based on the rock servo gas-solid coupling test system of MTS-816. The elastic strain energy of hard rock and that of gas-containing coal rock were calculated. Results show that the common calculation method and the novel method are similar for hard rock, therefore, the scientific nature of the method proposed in this study is verified. By contrast, the calculation results of the common calculation method for the gas-containing coal rock are considerably larger than those of the novel method. The deformation characteristics of the loading process of the gas-containing coal rock are effectively reflected in the novel method because this method calculates elastic strain energy using the stressvolume strain curve. Thus, the novel method has theoretical and practical significance in the scientific prevention and control of coal mine power disasters.

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Failure analysis method of concrete arch dam based on elastic strain energy criterion

Cited by 26 publications

References 14 publications

Uncertainty Instability Risk Analysis of High Concrete Arch Dam Abutments

Uncertainty Instability Risk Analysis of High Concrete Arch Dam Abutments

Monitoring the deformation and strain analysis on the Ataturk Dam, Turkey

Elastic Strain Energy Stored in Gas - Containing Coal Rock

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