Numerical modelling of RC floor slabs

[摘要] The aim of the paper is to conduct a comparative analysis of four calculation models of reinforced concrete floor slabs, that differ in geometry and the way of supporting. The investigation focuses primarily on the analysis of deflections of cracked reinforced concrete slabs, while monitoring the degree of determined reinforcement and the width of crack opening. The used programs were analyzed in terms of their capabilities, necessary in the work of a modern construction engineer, such as modeling of concrete rheology, determining the real reinforcement, finite element mesh variation, taking into account changes in stiffness of the cracked section, etc. The computational methods used in the software were also taken into account, including the possibility of performing non-linear analysis (mainly in the case of material non-linearity), updating the stiffness matrix (inelastic method) or considering possible stiffening of the concrete under tension. Each model was calculated taking into account the influence of shrinkage and without analyzing it, that required additional analysis of the ways of modeling rheology of concrete with use of computer programs.

[发布机构] Mestil Engineering Studio, Kwidzynska 71, Wroclaw, Poland^1;pol, Wroclaw, Wybrzeze St. Wyspianskiego 27, Wroclaw^2

[学科分类] 土木及结构工程学

[关键词] Calculation models;Comparative analysis;Construction engineers;Crack opening;Cracked reinforced concrete;Finite element meshes;Floor slabs;Material non-linearity