Alkali-aggregate reaction can not only cause uneven expansion of concrete but also lead to cracking and even destruction consequently affect the working behavior long-term safety hydraulic structures. Present researches on alkali-aggregate focus improving composition ratio materials through experimental study inhibit reaction, whereas there is a lack quantitative calculation analysis. In presen...

Arch dams are generally built in cantilvever monoliths. Vertical contraction joints between monoliths control the stresses due to concrete shrinkage and temperature variations. Past studies in earthquake safety evaluation of the system often show the tensile fracture and local nonlinear deformation of joints. In this paper, some nonlinear joint element constitutive models are presented to exami...

A dam may be damaged by occasional extreme loads such as major earthquakes or terrorist attacks during its service. According to the needs of emergency assessment, this paper studies a rapid damage identification method for location and degree in concrete arch dams which is based on dynamic characteristics data, using wavelet transform, packet decomposition, BP neural network D-S evidence theor...

Considering the strong non-linear time-varying behavior of dam deformation, a novel prediction model, called Levy flight-based grey wolf optimizer optimized support vector regression (LGWO-SVR), is proposed to forecast displacements hydropower dams. In used create whereas algorithm employed search penalty and kernel parameters for SVR. this work, multiple-arch was selected as case study. To val...

Introduction. The stone-and-earth dam of the Yumaguzinskiy hydroelectric complex on Belaya river is constructed in complicated geological conditions heterogeneous foundation. results computational research stress-strain state (SSS) dam, carried out for variant an earth with central core are presented. When calculating deflected mode dams, real structure ground characterized by its relation elas...