Essays about: "numeriska analyser."

Showing result 16 - 20 of 22 essays containing the words numeriska analyser..

  1. 16. Reinforced Concrete Subjected To Restraint Forces : A comparison with non-linear numerical analyses

    University essay from KTH/Bro- och stålbyggnad

    Author : Niels Brattström; Oliver Hagman; [2017]
    Keywords : Restraint forces; concrete; cracking; restraint degree; crack width; creep; thermal actions; shrinkage; Tvångskrafter; betong; sprickor; inspänningsgrad; sprickvidder; krypning; termisk last; krympning;

    Abstract : In Sweden, it is Eurocode 2 which forms the basis for performing a design of concrete structures, in which methods can be found treating the subject of restrained concrete members and cracking in the serviceability limit state. In the code, both detailed hand calculations procedures as well as simplified methods are described. READ MORE

  3. 17. Numerical analyses of concrete buttress dams to design dam monitoring

    University essay from KTH/Betongbyggnad

    Author : Daniel Svensen; [2016]
    Keywords : Concrete; buttress dams; thermal effects; finite element analysis; instrumentation; alarm values; alert values; Betong; lamelldammar; termiska effekter; finit element analys; intstrumentering; larmvärden;

    Abstract : Old concrete buttress dams are sensitive to cracking if exposed to large temperature variations. The cracks can make dams sensitive to failure, depending on the size and location of the cracks. These problems can be overcome by lowering the temperature variations and stabilizing the dams. READ MORE

  4. 18. Investigation of Outflow Boundary Conditions for Convection-Dominated Incompressible Fluid Flows in a Spectral Element Framework

    University essay from KTH/Numerisk analys, NA

    Author : Erik Boström; [2015]
    Keywords : ;

    Abstract : In this thesis we implement and study the effects of different convective outflow boundary conditions for the high order spectral element solver Nek5000 in the context of solving convective-dominated fluid flow problems. By numerical testing we show that the convective boundary conditions preserve the spatial and temporal convergence rates of the solver. READ MORE

  5. 19. Influence of Fluid Structure Interaction on a Concrete Dam during Seismic Excitation : -Parametric analyses of an Arch Dam-Reservoir-Foundation system

    University essay from KTH/Betongbyggnad

    Author : Rikard Hellgren; [2014]
    Keywords : seismic; fluid-structure interaction; arch dam; concrete; finite element analysis; jordbävning; fluid-struktur interaction; valvdamm; betong; finit element analys;

    Abstract : The aim of this study is to investigate how Fluid-Structure interaction is included in numerical earthquake analyses of dams. The base for this project is theme A from the 12th international benchmark workshop on numerical analysis of dams, which was held in October 2013. READ MORE

  6. 20. Numerical simulations of energy absorbing boundaries for elastic wave propagation in thick concrete structures subjected to impact loading

    University essay from Institutionen för fysik

    Author : Daniel Olsson; [2012]
    Keywords : Numerical simulations; elastic media; wave propagation; concrete; impact loading; energy absorbing boundaries; longitudinal; primary wave; secondary wave; shear; Rayleigh damping; Rayleigh wave;

    Abstract : As many of the world’s nuclear power plants are near the end of their supposed life span a need arise to assess the components crucial to the safety of these plants. One of these crucial components is the concrete reactor confinement; to assess its condition, non-destructive testing (NDT) is an attractive method. READ MORE