Sensitivity Analysis of Transient Load for Arch Dam Base on Finite Element Method

2014 ◽  
Vol 501-504 ◽  
pp. 1857-1862
Author(s):  
Xue Lu ◽  
Zhi Min Su ◽  
Feng Wang ◽  
Zhi Fang Tian ◽  
Jian Bing Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Tensile Stress ◽  
Water Level ◽  
Maximum Tensile Stress ◽  
Arch Dam ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Temperature Load ◽  
Element Method

Based on theories of finite element method, universal software ANSYS, by use of common software ANSYS as a platform, the influence degrees of transient temperature load and reservoir water load on arch dam stress are analyzed and computed. The result indicates that when the water level is same, the maximum tensile stress on arch dam has a close correlation with the variation of temperature, and the sensitivity of maximum tensile stress of arch dam for water temperature is higher than air temperature. The maximum tensile stress on arch dam does not correlate well with reservoir water level changes when the temperature is same. Through the non-dimensional processing on influencing factors which are temperature load and reservoir water level, the sensitivity of maximum tensile stress on arch dam for reservoir water pressure is higher than temperature load.

Discussion of Method for Computing Temperature Load during Operation Period on High Arch Dam

2013 ◽  
Vol 470 ◽  
pp. 976-979
Author(s):  
Zhi Qiang Wang ◽  
Xiao Bin Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Difference ◽  
Standard Method ◽  
Arch Dam ◽  
High Arch Dam ◽  
Linear Temperature ◽  
Temperature Load ◽  
Operation Period ◽  
Element Method

According to the existing arch dam design specification, the temperature load is obtained based on analytic solution of infinite long free plate, it only considers the average temperature and the equivalent linear temperature difference of dam section in operation period, the influence of non-linear temperature difference has not been considered. This kind of simplification has some approximation; especially it can not reflect spatial effect of larger temperature gradient changes in the upstream and downstream water level change area. This paper first takes the free plate as an example, has calculated the temperature field corresponding to analytical method, finite element method, standard method, explains the rationality of using written program to carry on finite element analysis. On this basis, take Xiluodu arch dam as an example, the dam temperature load and temperature stress has been analyzed by using finite element method and standard method, the difference between both has been discussed

Research on the Calculation of the Security of High Concrete Arch Dam Based on the Finite Element Method

2014 ◽  
Vol 1061-1062 ◽  
pp. 829-832
Author(s):  
Jia Long He ◽  
Yu Han Guo ◽  
Xi Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Water Level ◽  
Arch Dam ◽  
The Finite Element Method ◽  
Concrete Arch Dam ◽  
Flood Level ◽  
Normal Water ◽  
Dam Deformation ◽  
Element Method

The study on the calculation of the security of high concrete arch dam based on the finite element method will be studied and analyzed in this paper. For high concrete arch dam deformation and stability under normal water level and maximum flood level will be calculated, and the stress of each section of the dam and batholith around will be checked and analyzed, then this paper will come to the dam security conclusion finally.

scholarly journals Integrating the Finite Element Method with a Data-Driven Approach for Dam Displacement Prediction

2020 ◽  
Vol 2020 ◽  
pp. 1-16 ◽  
Author(s):  
Chenfei Shao ◽  
Chongshi Gu ◽  
Zhenzhu Meng ◽  
Yating Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Modulus ◽  
Random Coefficient ◽  
Arch Dam ◽  
Data Driven ◽  
The Finite Element Method ◽  
Random Coefficient Model ◽  
Proposed Model ◽  
Element Method

Both numerical simulations and data-driven methods have been applied in dam’s displacement modeling. For monitored displacement data-driven methods, the physical mechanism and structural correlations were rarely discussed. In order to take the spatial and temporal correlations among all monitoring points into account, we took the first step toward integrating the finite element method into a data-driven model. As the data-driven method, we selected the random coefficient model, which can make each explanatory variable coefficient of all monitoring points following one or several normal distributions. In this way, explanatory variables are constrained. Another contribution of the proposed model is that the actual elastic modulus at each monitoring point can be back-calculated. Moreover, with a Lagrange polynomial interpolation, we can obtain the distribution field of elastic modulus, rather than gaining one value for the whole dam in previous studies. The proposed model was validated by a case study of the concrete arch dam in Jinping-I hydropower station. It has a better prediction precision than the random coefficient model without the finite element method.

Study on Mechanism of Crack on Upstream Surface of Super-High Arch Dam

2013 ◽  
Vol 438-439 ◽  
pp. 1325-1328
Author(s):  
Jun Feng Guan ◽  
Long Bang Qing ◽  
Juan Wang ◽  
Wei Feng Bai ◽  
Yu Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Concentration ◽  
Three Dimensional ◽  
Arch Dam ◽  
High Arch Dam ◽  
Transverse Joint ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Method

A kind of crack with similar characteristics has been discovered on the upstream surface of super-high arch dam. In this paper, the reason of cracking was analyzed by the three-dimensional finite element method. It is found that the stress concentration of concrete near the water-stop structure led to the concrete initial cracking in the process of transverse joint open.

Study on Proposed Value of Catanchor Coefficient for Large Prestressed Pier

2011 ◽  
Vol 90-93 ◽  
pp. 2564-2569 ◽  
Author(s):  
Zhen Ke Huang ◽  
Shao Jun Fu ◽  
Huan Feng Qiu ◽  
Sheng Hong Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Tensile Stress ◽  
The Relationship ◽  
Coefficient Method ◽  
Element Method

The Catanchor Coefficient Method is widely adopted because of its simplicity and convenience. However, how to determine the value of catanchor coefficient is still a problem. In this paper, four typical large prestressed piers were analyzed via Finite Element Method (FEM) and the relationship between the catanchor coefficient and the tensile stress occurring inside the controlling part was studied. The results we obtained indicate that the tensile stress decreases nonlinearly when the catanchor coefficient increases. Moreover, it changes quickly when the catanchor coefficient is within the range from 1.10 to 2.00 but slowly when that is from 2.00 to 3.00 in contrast. Based on our conclusions, the range from 1.50 to 2.00 of catanchor coefficient is advised with the data of related prestressed piers.

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