Sökning: "pull-out tests"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden pull-out tests.

  1. 1. Three-Dimensional Modelling of Bond in Reinforced Concrete Theoretical Model, Experiments and Applications

    Författare :Karin Lundgren; Chalmers University of Technology; []
    Nyckelord :three-dimensional analysis; splitting effects; bond; finite element analysis; reinforced concrete; pull-out tests; non-linear fracture mechanics; frame corners; splicing of reinforcement; cyclic loading;

    Sammanfattning : The bond mechanism between deformed bars and concrete is known to be influenced by multiple parameters, such as the strength of the surrounding structure, the occurrence of splitting cracks in the concrete and the yielding of the reinforcement. However, when reinforced concrete structures are analysed using the finite element method, it is quite common to assume that the bond stress depends solely on the slip. LÄS MER

  2. 2. Experimental investigation of steel cables for rock reinforcement in hard rock

    Författare :Bengt Stillborg; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : This thesis describes a detailed experimental investigation of the mechanical behaviour of fully grouted steel cables used for rock reinforcement in hard rock. An attempt is also made to explain the possible modes of deformation and cable failure, based on observations from the experiments. LÄS MER

  3. 3. Fracture mechanics models for fatigue in concrete structures

    Författare :Kent Gylltoft; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This thesis deals with the application of fracture mechanics to model monotonic and cyclic loading of reinforced concrete structures. The main features of the work are: - Constitutive modelling based on fracture mechanics - Numerical studies of the models in various applications - Experimental studies to check the models and to determine material parameters The fracture mechanics models are formulated on a constitutive level. LÄS MER

  4. 4. Natural corrosion in reinforced concrete structures

    Författare :Samanta Robuschi; Chalmers University of Technology; []
    Nyckelord :neutron imaging; plain bars; anchorage; X-rays CT; reinforced concrete structures; Natural corrosion; chloride-induced corrosion.; pitting corrosion;

    Sammanfattning : Among the threats to the durability of concrete structures, corrosion of the reinforcement bars is undoubtedly the most common one. Corrosion damages impair safety and durability of infrastructure, and assessment of the safety is challenging due to the complex nature of the corrosion process. LÄS MER

  5. 5. Cracking in concrete : crack prevention with air-cooling and crack distribution with steel fibre reinforcement

    Författare :Patrik Groth; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This Licentiate Thesis consists of four parts. The first two parts, paper A and B, deal with air-cooling by means of embedded pipes in order to reduce thermal cracking in concrete structures. These two papers are submitted for publication to RILEM Journal; ‘Materials and Structures'. LÄS MER