Shear Design of concrete to AS3600 & AS5100

If you require further details please contact Andre van Zyl on 02 9955 1744 or [email protected].

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Monday, 9 March 2020
3:00 PM - 8:00 PM


TAFE Restaurant
Level 2 - Block C 66 Ernest Street, South Brisbane QLD 4101


In March 2020 the Concrete Institute of Australia will present a seminar titled "Shear Design (modified compression field theory) and the codes AS3600 - AS5100".



CIA Members $325.00 Non-Members $425.00 CIA Retired, Life & Honorary Members $130.00 CIA Student Members $55.00


Professor Stephen Foster
Professor and Head, School of Civil and Environmental Engineering - University of New South Wales

Mr. John Hilton
Design Director - Bridges - Aurecon


The modified compression field theory (MCFT) is a general model for the load-deformation behaviour of two-dimensional cracked reinforced concrete subjected to shear. It models concrete while considering concrete stresses in principal directions summed with reinforcing stresses assumed only axial.
The provisions for shear design in modern concrete codes are mainly based on old empirical relationships intended to provide a simple design procedure covering complex interactions between shear, bending and torsion, and this has resulted in significant differences between and within codes. The most critical assumption in the MCFT model is that the cracked concrete in reinforced concrete can be treated as a new material with empirically defined stress-strain behaviour.
The principal concrete codes are now moving away from the empirical approach and towards more rational and consistent methods. This trend is now being followed in Australia, with significant revisions implemented to the shear design provisions in the Concrete Structures (AS 3600-2018) and Bridge Design Code (AS 5100-2017).
The Institute is pleased to offer as our first National Seminar series for 2020, a half-day seminar on Shear Design of Concrete Structures, presented by Professors Stephen Foster (UNSW) and John Hilton (AURECON).

This seminar serves as a significant step in providing the knowledge required for shear design and clarity on the modified compression field theory, to be used properly and more efficiently for concrete design and evaluation.


15:00 Registration 
15:20 Introduction 
15:30: Modified Compression Field Theory
  • Updates and why they were needed.
  • MCFT model
Prof Stephen Foster
16:15: History of Shear Design
Mr John Hilton

17:00: Changes to AS 3600 and AS 5100 
  • Updates and why they were needed
  • AS3600 v AS5100
  • Summary of changes in AS5100.5
  • Punching Design with AS5100.5
Prof Stephen Foster
17:45: Break  
18:15: Worked examples       
  • Shear Design to AS5100.5-2017 
  • Shear Design – Beams and Slabs
Mr John Hilton
19:00: Strut and Tie design
  • Strut and Tie model
Prof Stephen Foster
19:45 Q & A Prof Stephen Foster and Mr John Hilton
19:45 - 20:15 Networking with eats and drinks  

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