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Concrete In Australia : December 2013
14 Concrete in Australia Vol 39 No 4 NEWS ONE GIANT LEAP Introducing Hilti SAFEset. non-cleaning chemical anchoring system. Achieve high loads, while setting anchors and rebar reliably – no hole cleaning required. For more information call 131 292 or visit www.hilti.com.au/SAFEset Hilti. Outperform. Outlast. SAFEset is a registered trade mark of Hilti. Experts to present at shear seminar Two Canadian experts on shear will present at the Institute’s seminar Shear Design of Concrete Structures on 5-14 March 2014. Prof Michael P Collins from the University of Toronto and Prof Denis Mitchell from McGill University, Montreal, will speak about the dangers of deficiencies in shear design of concrete structure and dispute traditional techniques. Together, they have researched the behaviour of concrete structures for about 40 years, evaluating and strengthening concrete structures in distress. Both are known for developing new approaches for the design of reinforced concrete in shear and torsion, and they have been involved in a significant number of failure investigations. The purpose of the seminar is to summarise recent research aimed at understanding the basic mechanisms of shear transfer, and to introduce simple, rational and general shear design and evaluation procedures. For determining flexural capacity, engineers can use simple, accurate, general and internationally accepted plane sections theory. However, for finding shear strength, most engineers still rely on restricted empirical equations whose applicability and accuracy are sometimes questionable. Topics for the seminar include: • basics of shear response: behaviour of reinforced concrete elements in pure shear including the Compression Field Theory and the Modified Compression Field Theory (MCFT) • shear response of reinforced and prestressed concrete flexural members; the side effect and the strain effect; design with the simplified MCFT; and evaluation with the program Response • shear response of deep beams and other disturbed regions; design with strut-and-tie models, which consider compatibility; and evaluation with the program VecTor2 • punching shear in slabs • detailed design examples of bridge girder, deep transfer girder, shear wall coupling beam, post-tensioned floor beam and large footing • lessons from shear failures and from evaluating the shear safety of existing concrete structures. A wall element with high strength reinforcement failing under shear and biaxial compression. 4-16 News.indd 14 4-16 News.indd 14 25/11/13 2:37 PM 25/11/13 2:37 PM