الفهرس 
Punching Shear Models
FINITE ELEMENT ANALYSISOnly 14 pages are availabe for public view
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Abstract
he objective of this study is to enhance the punching shear strength of
flat slabs at interior column. For this purpose, an economical and easy to
install strengthening method was applied to ½ scale flat slabs specimens.
The proposed strengthening scheme employs the use of fabricated steel
shear bolts placed around the column in different spacing and
arrangements as vertical punching shear reinforcement. In addition, the
effect of column aspect ratio on strengthening method was also
investigated in the scope of this study. Strength increase of at least 30%
was obtained for the strengthened specimens compared to the companion
reference specimen. Three dimensional nonlinear finite element model
was generated using ANSYS program to investigate the punching shear
failure mechanism of test specimens. 3-D finite element models are
successful in providing reasonable estimates of ultimate punching load
capacity, load-deformation behavior and strains. Extended parametric
study with new parameters was generated including new parameters. The
effect of compressive strength, spacing between shear bolts, and column
aspect ratio were investigated. A proposed guidelines and a design
equation were generated from the parametric study results using
regression analysis. The experimental punching load capacities of the
specimens were compared with the estimations punching shear load given
by ACI 318-14, Eurocode-2, and ECP203-2017.