Search for dissertations about: "anisotropy concrete"

Found 4 swedish dissertations containing the words anisotropy concrete.

  2. 1. The effect of scale on the morphology, mechanics and transmissivity of single rock fractures

    Author : Nader Fardin; KTH; []
    Keywords : Anisotropy; Aperture; Asperity degradation; Contact area; Finite Element Method FEM ; Flow analysis; Fractals; Fracture morphology; Heterogeneity; Stress-deformation; Surface roughness; Roughness-Length method; Scale dependency; Stationarity; Transm;

    Abstract : This thesis investigates the effect of scale on themorphology, mechanics and transmissivity of single rockfractures using both laboratory and in-situ experiments, aswell as numerical simulations. Using a laboratory 3D laserscanner, the surface topography of a large silicon-rubberfracture replica of size 1m x 1m, as well as the topography ofboth surfaces of several high-strength concrete fracturereplicas varying in size from 50mmx50mm to 200mm x 200mm, werescanned. READ MORE

  4. 2. Carbon fibre reinforced polymers for strengthening of structural elements

    Author : Anders Carolin; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Abstract : There is a large need for strengthening of concrete structures all around the world. There can be many reasons for strengthening, increased loads, design and construction faults, change of structural system, and so on. The need exists for both strengthening in flexure as well as in shear. READ MORE

  5. 3. Rolling Contact Fatigue of Railway Wheels Towards Tread Life Prediction through Numerical Modelling Considering Material Imperfections, Probabilistic Loading and Operational Data

    Author : Anders Ekberg; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Higher train speeds and increased axle loads have led to larger forces acting on the railway wheels. Also, efforts are presently being made to straighten existing tracks, to design new tracks with larger curve radii and to optimize bogie designs. READ MORE

  6. 4. Numerical modelling of jointed rock masses by distinct element method for two- and three-dimensional problems

    Author : Lanru Jing; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Abstract : The mechanical behaviour of a jointed rock mass is strongly, and sometimes dramatically, affected by the behaviour of the discontinuities present in jointed rock mass. In many cases, preferential failures are dominated or defined by the natural discontinuities present in the neighborhood of engineering engineering works. READ MORE