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.

Character of Embankment Reinforced with Geotextile on Sloping Weak Foundation

2010 ◽  
Vol 168-170 ◽  
pp. 1272-1276
Author(s):  
Jin Long Liu ◽  
Jie Qun Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Plastic Zone ◽  
Lateral Displacement ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
The Stability ◽  
Peak Value ◽  
Element Method

Based on nonlinear finite element method, the character of embankment reinforced with geotextile on sloping weak foundation has been studied. It is shown that the lateral displacement of embankment has been distinctly effected by the sloping of foundation, the value of lateral displacement on sloping foundation is greatly bigger than that of horizontal foundation. The peak value of lateral displacement can be effectively reduced by geotextile. With the same condition, geotextile in sloping foundation acts a more important effect than that of horizontal foundation. The development of plastic zone of embankment has been impeded and separated by geotextile, which enhanced the stability of embankment. The results also indicated that, if necessary, reinforcement such as anti-slide pile should be layout at lower toe of embankment on sloping weak foundation.

Numerical Analysis of Back Berm on Road Engineering with FEM

2013 ◽  
Vol 748 ◽  
pp. 1087-1090
Author(s):  
Jie Qun Liu ◽  
Dong Lin Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Lateral Displacement ◽  
Critical Value ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Road Engineering ◽  
The Stability ◽  
Element Method

Based on nonlinear finite element method (FEM), the effect of back berm has been systematically studied. It is found that the lateral displacement of embankment could be reduced by back berm effectively, and the stability of embankment increased rapidly with the width of back berm enlarged. There is a critical value of width of back berm, that the stability of embankment is no more increased with the width of back berm enlarged than critical value.

Design and Stability Analysis of Latticed Shell Structure in Site of Tianluoshan

2012 ◽  
Vol 193-194 ◽  
pp. 864-867
Author(s):  
Wen Feng Du ◽  
Zhi Fei Sun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Shell Structure ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Geometrical Nonlinear ◽  
The Stability ◽  
Element Method ◽  
Geometrical Nonlinear Finite Element

The design and analysis of the large span steel latticed shell structure in site of Yuyao TianLuoshan is introduced, and some key problems are dwelled on in this paper. By the geometrical nonlinear finite element method, the nonlinear stability analysis is carried out. The buckling modal and the whole course of instability are shown by two analysis method, the eigen-buckling analysis and the geometrical nonlinear finite element method. The influence of spring support to the stability of the structure is analyzed. It is shown that the structure has good wind-resisting capacity, which is fit to the circumstance near sea with lots of typhoon. Large compressive membrane stresses arise in the structure under the condition of temperature rise, leading to a significant reduction in the stability load-carrying capacity of the structure.

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.

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