Community Research and Development Information Service - CORDIS

Earthquake resistant reinforcements for the construction industry

Currently concrete slab reinforcements encounter problems with the top two layers of reinforcement, which create anchorage problems with the shear reinforcement. The simple but innovative design of a new alternative overcomes these problems because it uses punched holes in steel strips to assist in its anchoring capabilities.
Earthquake resistant reinforcements for the construction industry
For many years the construction industry has known that factory produced concrete slabs provide a more economical solution for constructing multi-storey buildings. However, concrete slabs produced in this way are inherent with a number of different disadvantages, which in turn incurs additional costs and safety issues. However, one of the largest concrete academic centres in the UK has now solved these problems with a revolutionary reinforcement that does not compromise safety or cost.

The Centre for Cement and Concrete (CCC) at the University of Sheffield, specialises in the most critical aspects with respect to concrete, including durability, structural performance, earthquake design and finite element analysis. The CCC has spent several years designing reinforcements for concrete that would eliminate one of the most prevalent disadvantages associated with concrete slabs - and Shearband is that realisation. The product had to take into account current trends and weaknesses, and it had to be able to be used with other systems.

The four principle categories for concrete slab reinforcement are, steel section shearhead reinforcement, inclined reinforcement, stirrup reinforcement and stud rail reinforcement. Unlike the other 4 methods, Shearband is much cheaper and effectively overcomes the problems of punching shear because of its simple design detail and ease of instalment. Also it does not increase the flexural capacity of the concrete slabs, which can lead to brittle failure; and this alone means that thinner concrete slabs can now be produced.

The CCC has patented Shearband and has already managed to obtain licences in the UK, Ireland, and the USA and Canada. In order to verify the system results thus far obtained, future objectives for the CCCs Shearband product include further research and development in seismic regions. In addition Abcot Inc, were granted a sub licence for Shearband, and following testing in California they have recently gained the International Conference of Building Officials approval.

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Record Number: 81022 / Last updated on: 2005-09-18
Domain: Industrial Technologies