Prediction of load capacity of one way reinforced concrete slabs with openings using nonlinear finite element analysis


KAYA N., ANIL Ö.

Journal of Building Engineering, vol.44, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jobe.2021.102945
  • Journal Name: Journal of Building Engineering
  • Journal Indexes: Science Citation Index Expanded, Scopus, Compendex, INSPEC
  • Keywords: Nonlinear finite element analysis, One way reinforced concrete slab, Opening, Shear transfer coefficient, LIFE-CYCLE ASSESSMENT, RC SLABS, SHEAR-STRENGTH, CFRP, PERFORMANCE, CUTOUTS, GFRP

Abstract

© 2021Nonlinear finite element analysis of a one-way reinforced concrete slab with openings was performed in this study. Experimental studies of the authors were used to validate the finite element model created in this study. The variables examined in this experimental study are the sizes and locations of the openings on the slabs. In the first step of this numerical study, a finite element model was constructed, verified by using seven experimental results, one of which is a reference without openings. General load-displacement behavior, ultimate load capacities, yield stiffnesses, and failure modes were obtained from the nonlinear finite element analysis and experimental results. The analyses were performed by using ANSYS software. The general load-displacement behavior, ultimate load capacity, initial stiffness, and failure modes obtained from the verified finite element model with experimental results are closely matched with the experiment. Load capacity values obtained from finite element analysis at yield and ultimate load level were obtained close to experimental results with average error levels of 4.7% and 2.7%, respectively. The displacement values at yield and ultimate load levels obtained from the finite element analysis were close to experimental results with average error levels of 20.4% and 0.3%, respectively. In the second step of this study, using the validated analysis model, finite element analysis of 4 specimens with differently located openings, which were not carried out in the experimental study, were performed, and the load-displacement behaviors were obtained. Using the results of the performed analyses, two equations, which consist of parameters investigated in the study, have been proposed to calculate the ultimate load capacity of a one-way reinforced concrete slab with openings varying in location and dimension.