Title: Response of Reinforced Concrete Shell Elements Subjected to In-Plane and Out-of-Plane Shear

Author(s): Giorgio T. Proestos, Evan C. Bentz, and Michael P. Collins

Publication: Structural Journal

Volume: 121

Issue: 2

Appears on pages(s): 165-180

Keywords: axial stress; experiments; interaction diagrams; moments; shear; shells; three-dimensional; torsion

DOI: 10.14359/51740252

Date: 3/1/2024

Abstract:
This paper investigates the response of reinforced concrete shell elements subjected to all eight stress resultants (in-plane shear, two out-of-plane shears, torsion, two axial loads, and two moments). Twelve new experiments subjected to different combinations of in-plane and out-of-plane loads are presented. The experiments examine the influence of varying quantities of transverse shear reinforcement and concrete strengths. The paper also presents a new nonlinear, high-powered, macro finite element model called Shell II. The Shell II method is a three-layered model based on the equations of the Modified Compression Field Theory and is capable of predicting the full three-dimensional load-deformation response of shell elements subjected to combined loads. Shell II is also used to examine the experimental results in the context of in-plane versus out-of-plane shear-stress interaction diagrams. The results highlight the importance of considering combined loading in predicting the response of shells in three dimensions.