Reinforcement evaluation of high arch dam concrete socket based on nonlinear finite element method

2014 ◽  
pp. 351-356
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Nonlinear Finite Element ◽  
Arch Dam ◽  
Nonlinear Finite Element Method ◽  
High Arch Dam ◽  
Dam Concrete ◽  
Element Method

Reinforcement Analysis of Wanjiakouzi Arch Dam Using 3D Nonlinear Finite Element Method

2011 ◽  
Vol 255-260 ◽  
pp. 3472-3477
Author(s):  
Wei Wei ◽  
Qing Hui Jiang ◽  
Chi Yao ◽  
Tao Xie
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Bands ◽  
Nonlinear Finite Element ◽  
Arch Dam ◽  
Nonlinear Finite Element Method ◽  
Dam Foundation ◽  
Weak Rocks ◽  
The Stability ◽  
Element Method

Wanjiakouzi arch dam is constructed in a complex geological site, where a large number of faults, interlayer shear bands and karst zones exist in the dam foundation and abutments. The weak rocks have a bad effect on the stability of the arch dam. In this paper, the displacement distribution and stress field of the arch dam are analyzed using 3D nonlinear finite element method. The numerical results show that displacement between both left and right bank abutments is obviously asymmetric and there is greater compression and shear deformation along the faults under the thrust of the arch dam. Furthermore, the tensile stress at dam heel cannot meet the requirement of the design specifications. Therefore, it is necessary to reinforce the dam foundation and abutments to improve the ability to resist deformation of abutment. By taking such reinforcement measures as concrete plugs and consolidation grouting for weak zones, the asymmetric displacements between abutments are decreased significantly and the tensile stresses of dam heel meet the stability requirement.

Performance Evaluation of Spring for the Vehicle Suspension System Using the Nonlinear Finite Element Method

2014 ◽  
Vol 635-637 ◽  
pp. 594-597
Author(s):  
Byeong Soo Kim ◽  
Byung Young Moon ◽  
Sung Kwan Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Material ◽  
Suspension System ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Air Spring ◽  
Rubber Sleeve ◽  
The Impact ◽  
Element Method

Air spring is used for the suspension system and it affects the vehicle stability and riding comfort by improving the impact-relief, braking, and cornering performance. Air Spring is comprised of the upper plate, lower plate, and rubber sleeve. Rubber sleeve is the composite material, which is made up of combination of rubber and Nylon, and the characteristics are changed according to the shape of rubber-sleeve, the angle of reinforcement cord. In this study, the distribution of internal stresses and the deformation of rubber composite material are analyzed through the nonlinear finite element method. The result showed that the internal maximum stresses and deformations about the changes of cord angle caused the more the Young's modulus decrease, the more maximum stress reduced.

scholarly journals Fast Stiffness Matrix Calculation for Nonlinear Finite Element Method

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Emir Gülümser ◽  
Uğur Güdükbay ◽  
Sinan Filiz
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stiffness Matrix ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Nonlinear Fem ◽  
Calculation Technique ◽  
Stiffness Matrices ◽  
Matrix Calculation ◽  
Element Method

We propose a fast stiffness matrix calculation technique for nonlinear finite element method (FEM). Nonlinear stiffness matrices are constructed using Green-Lagrange strains, which are derived from infinitesimal strains by adding the nonlinear terms discarded from small deformations. We implemented a linear and a nonlinear finite element method with the same material properties to examine the differences between them. We verified our nonlinear formulation with different applications and achieved considerable speedups in solving the system of equations using our nonlinear FEM compared to a state-of-the-art nonlinear FEM.

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