ABSTRACT: An efficient method is proposed to find optimal design of arch dams on the basis of constrained natural frequencies utilizing continuous evolutionary algorithm. To extract natural frequencies of arch dam considering fluid-structure interaction, it is necessary to solve the unsymmetrical damped eigenproblem. This means that the process of natural frequencies extraction may impose much ...

Most of the existing concrete dams are subjected to cracking. These cracks are caused by various factors such as construction practices, curing, loads and volume change of mass concrete which reduce the efficiency, failure or instability of concrete dams. Using fracture mechanics as a new method to estimate stability and durability of concrete dams is recommended in scientific publications in w...

Cracked concrete arch dam’s behavior due to moderate earthquake magnitude and water pressure variation was investigated. Plain used cast the models with 45 Mpa design strength. A shake table has been planned, manufactured, built create a dynamic testing facility. The experimental work included of four scaled-down dams’ models, which is divided into two groups, each group contains different degr...

Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions discontinuous foundation

During the first filling, reservoir is gradually raised in multiple stages. At each stage, filling paused to allow adequate time for monitoring and evaluating performance of dam its foundation. The analysis monitored behavior assessment security conditions performed by comparing values measured system installed with predicted numerical models representing structural behavior, material propertie...

The deformation properties of concrete arch dams are affected by the synergistic effects multiple factors, featuring strong, multidimensional spatialtemporal evolution and distribution characteristics. This paper proposes a zoned safety monitoring model for dam based on similarity optimization to evaluate state structures. First, clustering points at different locations an was performed using p...

This study numerically predicts the failure scenario of a cracked concrete gravity dam through a push-over nonlinear analysis. The mixed-mode Linear Elastic Fracture Mechanics (LEFM) was employed using the extended finite element method (XFEM). The dam base was considered to be fully fixed without any foundation effects. The hydrostatic pressure on the dam's upstream face was increased incremen...

When applying reliability analysis to the monitoring of structural health, it is very important that gross errors–which affect prediction accuracy–are included within information. An approach using errors identification and a dam safety model for deformation data concrete dams proposed in this paper. It can solve problems strong nonlinearity difficulty identifying eliminating dams. This new met...