Stochastic finite element analysis of rockfill dam considering spatial variability of dam material porosity

Hui, Chen; Liu, Donghai

doi:10.1108/ec-06-2018-0266

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…New austrian tunnelling method (NATM) is a common method for highway tunnel construction at present. In tunnel engineering construction, combined with rock mass mechanics theory, bolt and shotcrete are used as the main support means of the tunnel (Chen & Liu 2019, Hinds et al 2021. The insufficient thickness of secondary lining is one of the common problems of tunnels constructed by NATM.…”

Section: Actual Stress Analysis Of Secondary Lining Structure Based O...mentioning

confidence: 99%

Evaluation method of highway quality and safety based on finite element analysis

Zhao

2022

EJSE

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With the continuous advancement of China's transportation infrastructure, the number and proportion of highway tunnels in expressway construction are increasing year by year. In order to accurately evaluate the quality and safety of highway tunnel engineering, the finite element analysis is used to evaluate the quality of highway tunnel secondary lining structure, the slotting method is used to analyze the working stress of tunnel secondary lining structure, and the load on the secondary lining structure is inversely analyzed combined with the finite element three-dimensional model to evaluate the quality and safety of tunnel secondary lining structure. The test results show that the error rate of working stress of secondary lining structure deduced by combining slotting method and finite element analysis is 2.22%, the average error rate of vertical uniformly distributed load analysis of two lane and three lane highway tunnels is 7.09%, and the average error rate of horizontal lateral pressure coefficient analysis is 16.37%. The numerical errors are within the acceptable accuracy range of actual highway tunnel engineering. Using finite element analysis to analyze the quality and safety of highway tunnel can accurately evaluate the quality and safety of secondary lining structure of tunnel engineering, and provide effective data reference for actual quality evaluation and defect reinforcement of tunnel engineering.

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Section: Actual Stress Analysis Of Secondary Lining Structure Based O...mentioning

confidence: 99%

Evaluation method of highway quality and safety based on finite element analysis

Zhao

2022

EJSE

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“…The material parameters involved in the finite element model are shown in Table 1. [28]. After the contact parameters in the file and the type and frequency of the output file were set, they were submitted to the solver for solution.…”

Section: A Establishment Of Finite Element Modelmentioning

confidence: 99%

Cutting Test and Finite Element Analysis of Plow Pick

et al. 2021

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The pick is the working part of the coal plow, the cutting performance of the pick is very important for the efficient production of the coal mine. In order to analyze the dynamic characteristics of the plow pick during the cutting process, a cutting test platform was built. The force of the plow pick and the vibration of the plow head were obtained through the cutting test, and the relationship between the vibration of the plow head and the cutting speed and cutting depth was analyzed. In order to study the influence of different alloy head shapes on the performance of plow pick, two kinds of pick were designed: a pick with chip bit and a pick with conical bit. The finite element method was used to establish the cutting model, and the numerical simulation was carried out. The research results show that the caving effect of pick with chip bit is better than that of pick with conical bit, but the cutting resistance of the pick with chip bit is greater than pick with conical bit. When the cutting angle was 60°, the force of the pick is the smallest and the force of the pick increases with the increase of the installation angle. The maximum error of the force of the pick obtained by the two methods was 8.41%. The cutting test verified the results of the numerical simulation. According to the research results, two types of pick were adopted in the coal plow, which were installed in different positions. Through the analysis of the actual working state of the plow, it is found that the damage form of the pick was consistent with the result of numerical simulation.

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“…Johari and Talebi [20] considered the uncertainties of soil parameters leads to an uncertain wetting branch of the soil-water retention curve (SWRC), and made a computer program to determine the reliability indices of unsaturated slopes under different rainfall intensities and seepage flow using random FEM (RFEM). Chen and Liu [21] developed a stochastic FEM to solve the calculation precision deficiency caused by spatial variability of dam compaction quality. Liu and Wang [22] proposed a probabilistic method for simulating the entire process of rainfall-induced landslides considering spatial variability of soil properties.…”

Section: Introductionmentioning

confidence: 99%

An investigation of integrating the finite element method (FEM) with grey system theory for geotechnical problems

Guang

Zhang

2022

PLoS ONE

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Numerical simulation is very important to solve geotechnical problems. However, it is difficult to obtain required comprehensive and accurate information such as parameters, boundary conditions, and etc. In this paper, a grey distributed parameter model, which integrates the finite element method (FEM) with the grey system theory, was proposed to address the issue. The analysis of grey properties on rock and soil system was performed. The equilibrium equations, geometric equations, physics equations and related differential equations were obtained, each of the equations contains grey parameters and variables. And the discretization and solution methods of the FEM with the grey variables were discussed. An example of deep-buried circular mining tunnel was applied to test the proposed model. The calculation results were compared with those of the exact solution (analytical solution) and the classical FEM, respectively, through which the rationality of the proposed model was demonstrated. For the first time, grey variables and grey parameters are defined in geotechnical numerical simulation. The expressions of basic equations with grey variables are given respectively. A grey distributed parameter model which integrates the FEM with the grey system theory is proposed to solve geotechnical problems, and the optimal solution to the proposed model is determined through calculation and comparison of an application example. The proposed numerical model with grey variables not only has the advantage of grey system theory, but also greatly improves the adaptability and application effect of the model, which contributes to the prediction and evaluation problems in geological engineering, geotechnical engineering, water conservancy engineering and civil engineering with complex structures.

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Stochastic finite element analysis of rockfill dam considering spatial variability of dam material porosity

Cited by 14 publications

References 30 publications

Evaluation method of highway quality and safety based on finite element analysis

Evaluation method of highway quality and safety based on finite element analysis

Cutting Test and Finite Element Analysis of Plow Pick

An investigation of integrating the finite element method (FEM) with grey system theory for geotechnical problems

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