scholarly journals Ant Colony Optimization Analysis on Overall Stability of High Arch Dam Basis of Field Monitoring

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Peng Lin ◽  
Xiaoli Liu ◽  
Hong-Xin Chen ◽  
Jinxie Kim
Keyword(s):  
Stress Distribution ◽  
Ant Colony Optimization ◽  
Field Monitoring ◽  
Arch Dam ◽  
Ant Colony ◽  
High Arch Dam ◽  
Feedback Analysis ◽  
Comparison Results ◽  
Overall Stability ◽  
Dam Concrete

A dam ant colony optimization (D-ACO) analysis of the overall stability of high arch dams on complicated foundations is presented in this paper. A modified ant colony optimization (ACO) model is proposed for obtaining dam concrete and rock mechanical parameters. A typical dam parameter feedback problem is proposed for nonlinear back-analysis numerical model based on field monitoring deformation and ACO. The basic principle of the proposed model is the establishment of the objective function of optimizing real concrete and rock mechanical parameter. The feedback analysis is then implemented with a modified ant colony algorithm. The algorithm performance is satisfactory, and the accuracy is verified. Themgroups of feedback parameters, used to run a nonlinear FEM code, and the displacement and stress distribution are discussed. A feedback analysis of the deformation of the Lijiaxia arch dam and based on the modified ant colony optimization method is also conducted. By considering various material parameters obtained using different analysis methods, comparative analyses were conducted on dam displacements, stress distribution characteristics, and overall dam stability. The comparison results show that the proposal model can effectively solve for feedback multiple parameters of dam concrete and rock material and basically satisfy assessment requirements for geotechnical structural engineering discipline.

Effect of the impounding process on the overall stability of a high arch dam: a case study of the Xiluodu dam, China

2015 ◽  
Vol 8 (11) ◽  
pp. 9023-9041 ◽  
Author(s):  
Danni Luo ◽  
Peng Lin ◽  
Qingbin Li ◽  
Dong Zheng ◽  
Hongyuan Liu
Keyword(s):  
Arch Dam ◽  
High Arch Dam ◽  
Overall Stability

Failure and overall stability analysis on high arch dam based on DFPA code

2014 ◽  
Vol 45 ◽  
pp. 164-184 ◽  
Author(s):  
Peng Lin ◽  
Tianhui Ma ◽  
Zhengzhao Liang ◽  
Chun An Tang ◽  
Renkun Wang
Keyword(s):  
Stability Analysis ◽  
Arch Dam ◽  
High Arch Dam ◽  
Overall Stability

scholarly journals Feedback Analysis and Prevention & Control Strategy of the Real Causes of the Gallery Cracks in Super-High Arch Dam

2021 ◽  
Author(s):  
Yaosheng Tan ◽  
Chunfeng Liu ◽  
Youzhi Liu ◽  
Jingtao Li
Keyword(s):  
Control Strategy ◽  
Safety Monitoring ◽  
Influential Factors ◽  
Arch Dam ◽  
High Arch Dam ◽  
Feedback Analysis ◽  
The Real ◽  
Actual Temperature ◽  
Cracking Mechanism ◽  
Cracking Process

Gallery cracks occur commonly in concrete dams, but their cracking mechanism has yet to be effectively revealed. In this paper, the actual temperature, stress change history and cracking process of a gallery area were uncovered, based on the safety monitoring data of cracks in a super-high arch dam. In addition, the basic development and change laws, as well as the corresponding cracking mechanism, were analyzed, and the real causes and influential factors of cracks at the site were revealed, which will provide a reference for the prevention of cracks in similar projects in the future.

Engineering Advice for Preventing Crack on the Upstream Surface of Super-High Arch Dam

2013 ◽  
Vol 438-439 ◽  
pp. 1320-1324 ◽  
Author(s):  
Jun Feng Guan ◽  
Long Bang Qing ◽  
Wei Feng Bai ◽  
Juan Wang ◽  
Peng Lin
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Water Pressure ◽  
Arch Dam ◽  
High Arch Dam ◽  
Propagation Length ◽  
Crack Stability ◽  
Dam Concrete ◽  
The Relationship ◽  
Crack Propagation Length

In this paper, the crack stability and crack propagation regularity of the upstream surface of super-high arch dam along the water-stop structure were analyzed in the framework of fracture mechanics. According to fracture toughness of dam concrete, the relationship between the crack propagation length and the allowable water pressure was studied. Finally, two main specific engineering suggestions for avoiding this kind of crack on the upstream surface of super-high arch dam were given: (1) the value of checking water pressure should not exceed 0.4 MPa; (2) the flange of the water-stop structure near the upstream surface of dam should be changed toward the downstream.

scholarly journals Overall Stability Analysis of Xiluodu High Arch Dam Based on Fine Three-Dimension Numerical Modeling

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Tianhui Ma ◽  
Zhiqiang Feng ◽  
Chun'an Tang ◽  
Peng Lin ◽  
Kedar Prasad Yadav
Keyword(s):  
Shear Fracture ◽  
Normal Load ◽  
Failure Process ◽  
Structure Design ◽  
Arch Dam ◽  
Tensile Failure ◽  
Design Stage ◽  
Load Factor ◽  
High Arch Dam ◽  
Overall Stability

The RFPA3D is used to establish a fine finite element model of 6.63 million elements, which realizes the fine simulation of the stability of the Xiluodu arch dam under layered, overall, multiworking conditions and multistress fields, and the cracking and failure process under overload. The structural design scheme of the arch dam and the corresponding foundation treatment design are evaluated. The model fully reflects the measures of dam shape structure design, angle fitting structure design, and foundation concrete replacement in the Xiluodu arch dam technical design stage. The RFPA3D adopts the mesoelement elastic damage model, which considers the Mohr–Coulomb criterion of shear fracture and the maximum tensile failure criterion, and assumes that the mechanical properties of the element satisfy Weibull distribution to consider its heterogeneity. The simulation results show that, under normal load conditions, the dam foundation surface after comprehensive reinforcement has better overall stability, the stress and deformation of the dam body have good symmetry, and the overload factor of crack initiation under overload calculation K1 = 2P0 (P0 is normal water load), the nonlinear deformation overload factor K2 = 3.5–4P0, and the limit load factor K3 = 7.5–8.0P0, dam safety can be satisfied. The RFPA3D is used to establish a superlarge fine model to study the overall stability of the high arch dam, which provides an effective method for analysis and research of other large hydraulic projects in the world.

scholarly journals Cracking Risk and Overall Stability Analysis of Xulong High Arch Dam: A Case Study

2018 ◽  
Vol 8 (12) ◽  
pp. 2555 ◽  
Author(s):  
Peng Lin ◽  
Pengcheng Wei ◽  
Weihao Wang ◽  
Hongfei Huang
Keyword(s):  
Three Dimensional ◽  
Arch Dam ◽  
High Arch Dam ◽  
Arch Dams ◽  
Nonlinear Constitutive Model ◽  
Cracking Control ◽  
Overall Stability ◽  
Three Dimensional Finite Element ◽  
Reinforcement Measures ◽  
Cracking Risk

It is of great significance to study the cracking risk, the overall stability, and the reinforcement measures of arch dams for ensuring long-term safety. In this study, the cracking types and factors of arch dams are summarized. By employing a nonlinear constitutive model relating to the yielding region, a fine three-dimensional finite element simulation of the Xulong arch dam is conducted. The results show that the dam cracking risk is localized around the outlets, the dam heel, and the left abutment. Five dam stress zones are proposed to analysis dam cracking state base of numerical results. It is recommended to use a shearing-resistance wall in the fault f57, replace the biotite enrichment zone with concrete and perform consolidation grouting or anchoring on the excavated exposed weak structural zone. Three safety factors of the Xulong arch dam are obtained, K_1 = 2~2.5; K_2 = 5; K_3 = 8.5, and the overall stability of the Xulong arch dam is guaranteed. This study demonstrates the significance of the cracking control of similar high arch dams.

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