Stress and strain analysis of reinforced concrete beam according to proposed methodology of parameter selection of high strength concrete
Piotr Smarzewski
Quarterly No. 1, 2013 pages 24-28
DOI:
keywords: finite element method, reinforced concrete, beam, high strength concrete
abstract The article presents the analysis of the stress and strain state of reinforced high strength concrete beams with a low level of reinforcement in the process of static deformation in comparison to experimental data, according to the methodology of determining the parameters for the constitutive model of high strength concrete, based on its ultimate uniaxial compressive strength. Three variants of numerical solutions of the BP-1a beam were presented, which are distinguished by their failure surface. Numerical calculations made with the use of the Newton-Raphson method with adaptive descent and Crisfield’s arc length method are verified with experimental results. The development of strain for extreme concrete fibres of the compression zone and the development of strain for a longitudinal reinforcement bar in the tension zone at beam’s midspan are characterized by excellent agreement in the presented cases.