ABSTRACT
Radical Concrete Technology. Edited by R K Dhir and P C Hewlett. Published in 1996 by E & FN Spon, 2-6 Boundary Row, London SE1 8HN, UK. ISBN 0 419 21480 1. ABSTRACT. This paper describes a programme of tests designed to investigate moment distribution effects in three high strength reinforced concrete beams. Each beam was 5.2m long and carried on three supports with each of the two spans being loaded with a central point load. Strain gauged reinforcement was used to obtain very detailed information regarding reinforcement strain distributions over the centre support and in one of the spans. Similar specimens using normal strength concrete had already been tested as part of a previous test programme. Early results indicate that the use of HSC can result in a change of failure mode from shear to bending with considerably higher reinforcement strains being developed as a consequence. Levels of moment redistribution appear to be similar with the two concrete types. Keywords: Moment redistribution, high strength concrete, two-span beams, strain gauged reinforcement. Dr R.H.Scott is a Reader in the School of Engineering at the University of Durham. He specialises in the measurement of reinforcement strain and bond stress distributions using reinforcing bars which have been internally strain gauged. To date these bars have been used in investigations into the behaviour of tension specimens, beam/column connections, single span and two-span beams, slab/column connections and curved anchorages. Before coming to Durham in 1978 he spent ten years in industry where he was involved in the design and construction of a wide range of structures, mainly in reinforced concrete and structural steelwork, but also including timber and loadbearing brickwork.
