Title:
Modeling Punching Shear of Reinforced Concrete Slabs Using Layered Finite Elements
Author(s):
Maria Anna Polak
Publication:
Structural Journal
Volume:
95
Issue:
1
Appears on pages(s):
71-80
Keywords:
degenerate elements; finite elements; layered analysis; parametric study;
punching shear; slabs;
DOI:
10.14359/528
Date:
1/1/1998
Abstract:
The paper examines the applicability of the finite element, layered, shell formulation in the global analysis of reinforced concrete slabs when subjected to high, concentrated transverse loads. The formulation incorporates quadratic, degenerate, isoparametric shell elements. A significant feature of these elements is their ability to take into account out-of-plane shear response. This allows the implementation of a three-dimensional constitutive model for the evaluation of the stiffness matrix. The proposed formulation allows the use of out-of-plane reinforcement in the elements. Through the consideration of the three-dimensional states of strain and stress in each layer, the model can predict the failure of structures caused by either flexure or punching shear. The paper presents and discusses the essential features of the proposed formulation which are related to the transverse shear model. The formulation has been checked against experimental results of tests on slabs subjected to punching shear. A parametric study has also been undertaken to determine the influence of several parameters on the behavior of slabs with and without stirrups.