This thesis investigates the structural behaviour of reinforced brickwork pocket-type sections using the twin approach of experimental and theoretical studies. The behaviour, in shear, of this type of reinforced brickwork is studied experimentally through tests conducted on 8 full-scale beams, under four-point loading, longitudinally-reinforced, and in which a range of shear-span/effective depth ratios (<I>a/d</I> = 2.0-6.0) and % reinforcement (ρ = 0.61%-1.60%) were investigated. Aspects of structural behaviour studied include (a) the ductility of the sections via their moment-curvature relationships as well as their load-deflection behaviour, (b) the shear behaviour of the sections vis-a-vis cracking development and growth through the various stages of loading up to and including the ultimate point. Since the reality of shear failure is such that the members were acting under both shear and flexural stresses, flexural behaviour of the sections was also investigated for the pocket-reinforced beams. The theoretical formulations were based on small scale representative prism test results conducted on the brickwork and the results obtained were compared with experimental findings. A summary of existing methods for predicting shear strength is presented. The method proposed is based on an adaptation of the technique based on plastic analysis which was used originally for predicting the shear strength of concrete beam sections. The ultimate shear strength results obtained experimentally for the eight pocket-reinforced beams are compared with theoretical predictions based on the proposed method. This adapted method is based on a rigorous analysis of all known brickwork beams which were reported to fail in shear. The flanged-action behaviour of these wall sections was investigated in order to ascertain its existence and characteristics. To this end, six full-scale simply-supported, reinforced brickwork pocket-type slab specimens, in which the % steel was kept constant and the pockets spacing varied, were tested to determine the characteristics of flanged-action behaviour in the walls. A method is proposed for the calculation of the effective width associated with the different cases of pocket stem spacings. This method is based on an analysis of experimental strain measurements across the pocket stems.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:657664 |
| Date | January 1998 |
| Creators | Mebude, Rotimi K. O. |
| Publisher | University of Edinburgh |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/1842/12642 |
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