Cages of Inclined Stirrups as Shear Reinforcement for Ductility of Flat Slabs

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Cages of Inclined Stirrups as Shear Reinforcement for Ductility of Flat Slabs

Author(s): Carl Erik Broms

Publication: Structural Journal

Volume: 116

Issue: 1

Appears on pages(s): 83-92

Keywords: ductility; flat slab; inclined stirrups; punching failure

Date: 1/1/2019

Abstract:
The provisions for design of shear reinforcement for flat slabs in the ACI 318 and Eurocode 2 building codes assume that punching failure and flexural failure can be treated as two mutually independent failure modes. However, if the flexural reinforcement yields, then wide flexural cracks will worsen the anchoring conditions for the shear reinforcement and a flexurally initiated punching failure may occur. However, shear reinforcement in the form of inclined stirrups is found to be effective even when wide flexural cracks develop and will, therefore, provide increased capacity and ductility when compared to a design with conventional shear reinforcement. Test results and design recommendations for ductile behavior as well as for maximum punching capacity are presented.