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

Peng Lin,Hong-Xin Chen,Jinxie Kim,Xiaoli Liu

doi:10.1155/2014/483243

Peng Lin, Hong-Xin Chen + Show 2 more

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https://doi.org/10.1155/2014/483243

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Abstract

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. The m groups 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.

Highlights

Scale models [1, 2], intelligent cracking control [3,4,5], numerical simulation [6,7,8], and prototype monitoring structures [9,10,11] have been used to investigate the behavior of concrete arch dams and foundation for the last 80 years
Based on the material parameters obtained from the various methods, comparative analyses were conducted on dam displacements, stress characteristics, and overall stability of dam-foundation system
Resulting from this study, a modified dam ant colony optimization (D-ACO) model is proposed for obtaining concrete and rock mechanical parameters of a large arch dam

Summary

Introduction

Scale models [1, 2], intelligent cracking control [3,4,5], numerical simulation [6,7,8], and prototype monitoring structures [9,10,11] have been used to investigate the behavior of concrete arch dams and foundation for the last 80 years. Much attention should be paid to long-term safe operation of dams based on prototype surveillance and inverse analysis. Parameters such as elastic modulus, unit weight, Poisson’s ratio, friction coefficient, and cohesion are parameters in structural analysis intrinsic to the determination of stress distributions and displacements, especially when the design of the structure is based on elasticity considerations. The exact parameter values can be determined, and a precise evaluation of dam cracking mechanism, the overall

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