Flexible Foundation Effect on Seismic Analysis of Roller Compacted Concrete (RCC) Dams Using Finite Element Method

2018 ◽  
Vol 22 (4) ◽  
pp. 1275-1287 ◽  
Author(s):  
Khaled Ghaedi ◽  
Farzad Hejazi ◽  
Zainah Ibrahim ◽  
Parveen Khanzaei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Seismic Analysis ◽  
Roller Compacted Concrete ◽  
Flexible Foundation ◽  
Element Method

Random finite element method for the seismic analysis of gravity dams

2018 ◽  
Vol 171 ◽  
pp. 405-420 ◽  
Author(s):  
M.A. Hariri-Ardebili ◽  
S.M. Seyed-Kolbadi ◽  
V.E. Saouma ◽  
J. Salamon ◽  
B. Rajagopalan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Seismic Analysis ◽  
Gravity Dams ◽  
Random Finite Element Method ◽  
Random Finite Element ◽  
Element Method

Seismic Analysis of Soil Nailed Wall Using Finite Element Method

2012 ◽  
Vol 535-537 ◽  
pp. 2027-2031 ◽  
Author(s):  
Jian Chun Wu ◽  
Rong Shi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Seismic Analysis ◽  
Retaining Wall ◽  
Plastic Behavior ◽  
Soil Nailing ◽  
Nonlinear Fem ◽  
Elastic Plastic ◽  
Flexible Retaining Wall ◽  
Element Method

Using dynamic elastic-plastic finite element method, on the base of works together and interaction between loess and flexible retaining wall, 3-D nonlinear FEM (ADINA) is used to analyze and discussed the dynamic response of slope protected by soil nailing retaining wall under the EL-Centro and man-made Lanzhou accelerogram. A model that is capable of simulating the nonlinear static and dynamic elastic-plastic behavior of soil is used to model the soil, and a bilinear elastic-plastic model that has hardening behavior is used to model the soil nailing. Friction-element is employed to describe the soil-structure interaction behavior.The results show that the method is safe and credible. The results of the FEM dynamic analysis can be a useful reference for engineers of the design and construction of the soil nailed wall.

The effect of construction designs on temperature field of a roller compacted concrete dam — a simulation analysis by a finite element method

2003 ◽  
Vol 30 (6) ◽  
pp. 1153-1156 ◽  
Author(s):  
Y L Chen ◽  
C J Wang ◽  
S Y Li ◽  
L J Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Simulation Analysis ◽  
Thermal Simulation ◽  
Maximum Temperature ◽  
Mass Concrete ◽  
Roller Compacted Concrete ◽  
Rcc Dam ◽  
Element Method

In this paper a numerical simulation of the construction process of roller compacted concrete (RCC) dams is presented. The following features of construction of mass concrete have been considered: hydration heat, age, placing temperature, starting placement date, and placing speed. A 3-D finite element model of the Long-Tan RCC dam, which is to be built in the Guangxi Autonomous Region in China, was analyzed. Temperature distribution and evolution inside the RCC dam were calculated during and after the completion of the dam. Using FortranTM code, a 3-D thermal simulation analysis of a high RCC dam can be realized on a computer at the construction site. Based on the real factors during the construction period, engineers can predict the distribution of temperature in the RCC dam. Therefore, engineers can take appropriate measures to control concrete temperature to reduce thermal stress within the dam. The effects of the concrete placing temperature, construction speed, and starting date on the temperature are discussed. It has been found that the maximum temperature in a dam can be reduced by 20% through temperature control measures.Key words: RCC dam, thermal simulation analysis, finite element method, temperature field, construction schedule.

Seismic Analysis and Redesign of the Center Row in Reactor Core

2014 ◽  
Vol 668-669 ◽  
pp. 244-247
Author(s):  
Mei Huang ◽  
Yuan Yuan Zhao ◽  
Zhao Yang Xing ◽  
Hao Yuan ◽  
Jian Nan Tang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Impact Force ◽  
Seismic Analysis ◽  
Reactor Core ◽  
Maximum Force ◽  
Seismic Load ◽  
Element Method

In this article, finite element method is used to analyze the properties of the reactor core under seismic load, and redesign the center assemblies to resist deformation and impact force. The result shows that the maximum force on the lug boss is decreased while the springs are applied.

scholarly journals Evaluation Standard for Safety Coefficient of Roller Compacted Concrete Dam Based on Finite Element Method

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Bo Li ◽  
Zhijun Zhang ◽  
Yan Liu ◽  
Shengmei Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Least Squares ◽  
Support Vector ◽  
Concrete Dam ◽  
Evaluation Standard ◽  
Safety Coefficient ◽  
Roller Compacted Concrete ◽  
Roller Compacted Concrete Dam ◽  
Element Method

The lack of evaluation standard for safety coefficient based on finite element method (FEM) limits the wide application of FEM in roller compacted concrete dam (RCCD). In this paper, the strength reserve factor (SRF) method is adopted to simulate gradual failure and possible unstable modes of RCCD system. The entropy theory and catastrophe theory are used to obtain the ultimate bearing resistance and failure criterion of the RCCD. The most dangerous sliding plane for RCCD failure is found using the Latin hypercube sampling (LHS) and auxiliary analysis of partial least squares regression (PLSR). Finally a method for determining the evaluation standard of RCCD safety coefficient based on FEM is put forward using least squares support vector machines (LSSVM) and particle swarm optimization (PSO). The proposed method is applied to safety coefficient analysis of the Longtan RCCD in China. The calculation shows that RCCD failure is closely related to RCCD interface strength, and the Longtan RCCD is safe in the design condition. Considering RCCD failure characteristic and combining the advantages of several excellent algorithms, the proposed method determines the evaluation standard for safety coefficient of RCCD based on FEM for the first time and can be popularized to any RCCD.

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