CE450. Reinforced Concrete  (ects: 6)

THEORY

Principles of reinforced concrete design. Design of structural systems, types of structural elements, linear and planar structural elements. Boundary conditions, actions, individual factors of safety, design values of permanent actions, design values of variable actions, combinations of actions in borderline situations durability and functionality, methods of calculating the internal forces. Design principles of reinforced concrete structures: Strength categories, stress-strain charts, flexural compressive, tensile, flexural tensile, biaxial strength of concrete. Deformation, modulus of elasticity, shrinkage during coagulation, creep, Poisson's ratio, thermal expansion factor, corrosion, carbonation, effect of chlorine ambient, conditions of environment. Reinforcement steel, stress-deformation diagrams, ductility of steel. The co-operation between concrete and steel: Stages of stress and flexing of reinforced structural elements, internal forces. Slabs: loading, width selection, methods of support. Cantilevers, simply supported, one or two ways overhanging. Ways of slab design, Marcus method, Czerny method. Continuous slabs. Slab reactions. Ribbed slabs. Three way slabs, two way spanning slabs. Reinforcement details: bend diameters of steel bars, anchorage of longitudinal reinforcement, bending diameter of steel bars, anchorage of longitudinal reinforcement, basic anchorage length, required anchorage length, joints of reinforcement bars. Details of simple and continuous reinforcement slabs.

LABORATORY

Introduction to concrete. Filler find atm-c117, óê--305, Los Angeles test (astm c-131), sampling. Quadra divide  of aggregates. Limits of gradation of aggregates. Concrete categories, grading composition, particle lines, mix design. Aggregate calculation applications, cement and water for the production of a cubic meter of fresh concrete. Types and categories of concrete and limits of strength categories. Mechanical properties of cement. Start and end of the coagulation of cement by Vicat. Compressive and bending strength of concrete. Strength requirements according to concrete regulations under Ð.Ä.244/1980. Admixtures for concrete, fresh concrete applications. Compression test of concrete with cubic specimens, cylindrical specimens and beams. Measuring the strength of concrete. Compliance criteria. Bending tests, testing tolerance in tension. Estimate the strength class of old structures with cores (carrots). Details of reinforcement, steel strength classes.