Application of shear bolts for punching shear retrofit of reinforced concrete flat slabs: Experimental results under static loads

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: Application of shear bolts for punching shear retrofit of reinforced concrete flat slabs: Experimental results under static loads

Author(s): M. A. Polak

Publication: KILW

Volume: 52

Issue: 2

Appears on pages(s): 389-405

Keywords: shear,bolts

Date: 4/1/2006

Abstract:
The purpose of the presented work was to test a newly developed punching shear retrofitting system for reinforced concrete flat slab-column connections. The proposed technique using shear bolt reinforcement allows increasing strength, ductility and rotational capacity of these connections. The paper discusses the role of transverse reinforcement in increasing post peak-load ductility and gives theoretical rationale for the proposed methodology. Shear bolts were developed at the University of Waterloo and tested in two series of tests on edge and interior slab-column connections. It is a special type of reinforcement for retrofitting of existing, previously built, flat slabs. The shear bolt consists of a headed vertical rod threaded at the other end for anchoring using a washer and nut system. The bolts are installed in holes drilled in a slab in concentric perimeters around the column. The results of the experimental work include connections tested under static loads. The load-deflection and load-strain curves are presented. The design methodology is discussed and the computed capacities of the specimens are compared to the experimental values.


Polish Academy of Sciences, International Partner Access.

View Resource »  Web View » USE YOUR REPAIR SUBSCRIPTION