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Seminar Overview

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 this online seminar on Shear Design of Concrete Structures, presented by Professor 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.

Seminar Presenters:

Prof. Stephen Foster - Head of School Civil and Environmental Engineering - UNSW

Stephen is an Honorary Member of the CIA, Fellow of Engineers Australia, and an fib Honorary Member. He is a former Director of the UNSW Centre for iIfrastructure, Engineering & Safety (CIES), and Head of the UNSW School of Civil & Environmental Engineering since 2012. He is currently Acting Head, School for Civil Engineering.

Throughout his career, Stephen has been involved in several research projects involving the use of technology in the development of concrete structures and infrastructure. In the field of High Strength and High Performance Concrete, he has undertaken extensive research at both the material and structural level and has won several competitive grants in the field.

His research on Strut-and-Tie Modelling and High Strength Concrete Columns now forms the basis of many of the design rules in the Australia Concrete Structures Standard, AS3600-2009. This has an impact on many thousands of structures built throughout Australia each year. Similarly, his works on high strength and high performance concrete has provided a significant impact on the construction industry through incorporation in the fib Model code draft 2010.

John Hilton - Design Director (Bridges) - Aurecon

With a career spanning over 40 years in bridge design and construction, John has an extensive project portfolio, within Australia, the Middle East, Southeast Asia, New Zealand and Africa. This experience encompasses a wide range of loadings, spans and structure types. A renowned expert, John has presented over 40 technical papers at various technical forums covering a range of diverse initiatives throughout his career.  A past winner of the John Connell Gold Medal from EA, he is also an integral part of the AS 5100 Bridge Code Committee and is chair on a number of sub-committees.
John is passionate about exploring new ideas, innovation, design led thinking and sustainable construction, and in helping to create and enable a professional environment where people can thrive and grow. Testament to this, he has recognised as Champion of Change as part of a gender equality initiative within Aurecon, and actively mentors and tutors our emerging professionals as well as university students.


Seminar Topics and Agenda

History of shear design Mr John Hilton
The MCFT and its implementation into Australian Standards (Part 1) Prof Stephen Foster
The MCFT and its implementation into Australian Standards (Part 2) Prof Stephen Foster
Worked examples of shear design Mr John Hilton
Strut and tie design Prof Stephen Foster