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Reinforced concrete deep beams with partially or fully fixed end conditions are more likely to occur in practical structures than simply supported end conditions. Tests carried out on eighteen beams over a range of geometrical parameters identified three modes of failure: flexure + shear, shear or diagonal splitting, and bearing. A simple method is proposed for the analysis of deep beams with fixed end conditions. The method is based on the assessment of strength for the different modes of failure and on maintaining the equilibrium of forces in all parts of the structure. The method is capable of predicting the mode of failure and the ultimate strength of the beams. The predicted modes of failure compare well with the experimental observations. The ultimate strengths from the analysis predict safer and, in a few cases, conservative values. A design method may be developed using the proposed method of analysis. N.K. Subedi
Verulam - our beginnings Our columns hme been a feature in The Structural Engineer for a sufficient period for most readers to have no recollection of the original inspiration which put us here. Since some 20 years have now passed since our first stirrings in the womb of the Institution’s Literature Committee, it may be of interest to recall, for readers’ benefit, how in fact we ‘came to be’. Verulam
Dr. Graham Owens (Imperial College of Science & Technology): As the person responsible for the development of the testing arrangements for the large-scale model I would like to say a few words about the particular difficulties of applying hydrostatic loading for a test to failure on a model of this scale and shape.