Use of the finite element method for the stability analysis of earth and rockfill dams

1986 ◽  
Vol 23 (3) ◽  
pp. 113
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
The Finite Element Method ◽  
The Stability ◽  
Element Method

scholarly journals ANALISIS STABILITAS TEROWONGAN DANGKAL PADA TANAH LUNAK

2020 ◽  
Vol 1 (1) ◽  
pp. 573-584
Author(s):  
Putri Nova Haryu Dhanti ◽  
Singgih Saptono
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Soft Soil ◽  
Infrastructure Development ◽  
The Finite Element Method ◽  
Swelling Properties ◽  
Road Tunnels ◽  
The Stability ◽  
Element Method

ABSTRAK Pada lima tahun terakhir ini banyak pembangunan yang dilakukan di Indonesia khususnya pembangunan infrastruktur, seperti pembangunan sarana Mass Rapid Transportation (MRT) berupa terowongan di Jakarta, dan berapa terowongan jalan raya dan terowongan jalur kereta api. Hal ini menjadi tantangan bagi para pembuatan terowongan di Indonesia. Tantangan tesebut adalah membuat terowongan jalan raya dan kereta api pada tanah lunak khususnya lempung dan pada kedalaman yang dangkal. Hal ini perlu perhatian khusus, disebabkan oleh sifat lempung yang memiliki sifat swelling dan serta penggalian terowongan tersebut pada kedalamanan kurang dari 100 m. Pendekatan kekuatan batuan sudah tidak dapat digolongan sebagai batuan karena pada umumnya menurut meterial lempung digolongkan sebagai tanah, sehingga teori elastistas sudah tidak berlaku lagi. Pendekatan yang diusulkan untuk analisis stabilitas  pada terowongan di batuan lempung  adalah berperilaku swelling sesuai dengan kandungan mineral penyusunnya yaitu montmorilonit. Untuk itu analisis stabiltas diperlukan parameter swelling. Pada Analisis dengan perilaku sewlling ini menggunakan metode elemen hingga (Phase2, Rocscience). Dengan pendekatan perilaku Swelling dalam  analisis stabilitas terwongan akan lebih mendekati dengan sifat material yang ada di terowongan. Kata kunci: swelling, metode elemen hingga, stabilitas, terowongan  ABSTRACT In the last five years a lot of development has been carried out in Indonesia, especially infrastructure development, such as the construction of Mass Rapid Transportation (MRT) facilities in the form of tunnels in Jakarta, and how many road tunnels and railroad tunnels. This is a challenge for tunnels in Indonesia. The challenge is to build road and rail tunnels on soft soil, especially clays and at shallow depths. This needs special attention, due to the nature of the clay which has swelling properties and the excavation of the tunnel in the depth of less than 100 m. Rock strength approach can no longer be classified as rock because in general according to clay meterial classified as soil, so the theory of electricity is no longer valid. The proposed approach for the stability analysis of tunnels in clay rock is to behave swelling according to its constituent mineral content, montmorillonite. For this reason, stability analysis requires swelling parameters. In this analysis with sewlling behavior using the finite element method (Phase2, Rocscience). With the Swelling behavior approach in the tunnel stability analysis it will be closer to the material properties in the tunnel. Key words : Swelling, Finite Element Method, Stability, Tunnel 

Stability Analysis of Composite Perforated Annular Sector Plates Under Thermomechanical Loading by Finite Element Method

2018 ◽  
Vol 18 (07) ◽  
pp. 1850100 ◽  
Author(s):  
Alireza Shaterzadeh ◽  
Hamed Behzad ◽  
Mohammad Shariyat
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Mechanical Load ◽  
Perforated Plate ◽  
Curvilinear Coordinates ◽  
Element Formulation ◽  
The Finite Element Method ◽  
The Stability ◽  
Element Method

This paper presents the stability analysis of a perforated plate with sector geometry made of composite materials. The sector of concern is a compound of graphite-epoxy and glass-epoxy with identical ply thickness but different fiber angles for each layer. The mechanical load conditions considered include uniform axial, circumferential, and biaxial pressure, while the thermal loading is specified to be uniform temperature increase over the whole sector. The existence of one or two circular holes has increased the complexity of analysis. To obtain solutions of high accuracy, the three-dimensional elasticity theory relations have been employed. Using the finite element method along with the stability condition of Trefftz, the buckling equation of the structure is derived. Green nonlinear strain-displacement relations are used to form the geometrical stiffness matrix. Unlike the finite element method used by other researches, a novel curved 3D B-Splined element is used to more accurately trace the displacement and stress variations of the structure. This element can be used in solution domains with geometric discontinuities, such as perforated plates and also meshed in the thickness direction. Moreover, instead of using the common von Karman assumptions, the most general form of the strain tensors in the curvilinear coordinates is adopted. The buckling load is obtained by extremizing the second variations of the total potential energy. The finite element formulation is coded in the MATLAB software. The effects of various parameters such as sector dimensions, dimensions of the hole, mechanical load directions, and fiber angles of each layer on the thermomechanical buckling is investigated.

Stability Analyses of Western Slopes in Jointed Rock Masses for GuangYang Highway

2011 ◽  
Vol 368-373 ◽  
pp. 234-240
Author(s):  
Shu Li Wang ◽  
Man Gen Mu ◽  
Ran Wang ◽  
Wen Bo Cui
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Limit Equilibrium ◽  
Western Slope ◽  
Seismic Load ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Limit Equilibrium Methods ◽  
The Stability ◽  
Element Method

This paper presents the results of a study on a joint slope deformation affecting the western slope of the GuangYang highway (YangQuan, China). Fieldwork identified the ongoing deformational process and assisted in defining its mechanisms, evolution and controlling factors. Here we discuss how to use limit equilibrium methods to calculate the behavior of slopes and to use the finite element analysis to evaluate the stability, displacements of slopes and soil-slope stabilization interaction. The finite element method with shear strength reduction (SSR) technique is explained in Phase2D. This method is effective for the prediction of the stability of slope. Based on numerical comparisons between the limit equilibrium methods and finite element method, it is suggested that the finite element method with SSR technique is a reliable and maybe unique approach to evaluate the slope stability. The paper also took into account effectiveness of the large rain and seismic load. The results of the numerical analysis are consistent with the observed slope surface evidence.

scholarly journals INTEGRATED SLOPE STABILITY ANALYSIS (SSA) WITH TRANSIENT GROUNDWATER FINITE ELEMENT METHOD FOR EMBANKMENT ANALYSIS

2021 ◽  
Vol 83 (5) ◽  
pp. 9-17
Author(s):  
Supandi Sujatono
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Slope Stability ◽  
Slope Stability Analysis ◽  
Clay Material ◽  
Analysis Method ◽  
The Finite Element Method ◽  
Element Method ◽  
Storage Facilities

The content of level has a big enough role in the value of the physical characteristic and the mechanical of material. The behavior of water in these materials needs to be analyzed first in order to support the slope stability analysis. Modeling of water behavior in materials in the construction of Tailing Storage Facilities (TSF) will be integrated in the slope stability analysis. This study aims to provide an explanation about the analysis of the Fishing Storage Facilities (TSF) which integrates transient groundwater analysis using the finite element method in supporting the stability analysis of the embankment of Tailing Storage Facilities (TSF). The variables that are used in the analysis, they are the parameters of physical properties and mechanic material for embankment and permeability parameters in analyzing groundwater. The analysis method for geotechnical and geohydrology modeling uses the finite element method. The results of analysis showed that groundwater behavior in the embankment material can be known in detail so that it can be integrated with stability analysis.   It can be seen that there is a decrease in the value of the slope safety factor using the Integrated Slope Stability Analysis method compared to the conventional method. Adding an impermeable layer using a thickness of 5 m of clay material and a thickness of 20-30 m to support the retaining wall/foot is the criterion of optimal stability. The required lining material thickness (D) can be expressed by the following drawdown percentage equation function:  reduction percentage = (1-0.8661D (-0.031)) * 100%.  

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