ABSTRACT
The nature of deep reinforced concrete beams has various implications in structural situations. In other chapters, attention has been drawn to the modifications needed to general flexural theory in order to predict the
structural behaviour of deep beams. In this chapter consideration is given to one specific implication of the depth of these elements, which is the additional action of vertical direct tensile forces arising from substantial loads applied at the soffit and lower levels of the beam. Research in this field has been limited and it is therefore reviewed within the scope of the chapter. It will be shown on the basis of comparison with laboratory tests that CIRIA design recommendations (1977) are safe and conservative in their recommendations for shear walls with combined top and bottom loadings. ACI procedures for deep beams 1983 are applicable only to top loading and these are also conservative.
