High Strength Eccentrically Loaded Slender Reinforced Concrete Deep Beams with Vertical Edge Restraints Ali Belhacene, Ahmed Bouhaloufa, Kaoutar Zellat, Tahar Kadri LMPC, Civil Engineering Department, university of Mostaganem, Algeria Abstract Buckling tests were carried out on 6 reinforced concrete deep beams having height/thickness ratios in the range 25 to 67. Observations were made on the ultimate loads and failure modes. The variables studied included the height/thickness ratio h/b, the load eccentricity/thickness ratio e/b. The observed behavior and failure modes of these beams were compared with those of similar specimens tested without vertical edge restraints as reported in the literature. The measured ultimate loads were also compared with values predicted using C.I.R.I.A guide 2: The design of deep beams in reinforced concrete. The aim of this experimental program is to study the behavior of slender high strength reinforced concrete deep beams with edge restraints or fixed ends under two top eccentrically concentrated loads. The eccentricity applied at the top and the bottom was intentional. This work is intended to provide more experimental data about the range of mode of failure of these structures that should be considered in design. The test beams were of height h=1000mm, overall length L=1700mm and simple span Lo=1400mm giving a span to depth ratio Lo/h of 1.4. The thickness varied from 40 to 15 mm giving a height to thickness ratio h/b ranging from 25 to67. Particular attention has been directed towards the mode of failure, the failure load, the shear strength and the effect of the end conditions on the behavior of these particular structures. 1 Introduction The Reinforced concrete deep beams have useful application in tall buildings, offshore structures and foundations, however their design is not yet covered by the BS 8110 which explicitly states that “for the design of deep beams, reference should be made to specialist literature” [1]. Currently, the main design documents are the American code ACI-318-99 [2] ; the CEB-FIP model code and the C.I.R.I.A guide N° 2, [3] notes that the new Euro code EC 2 [4] gives only a very brief reference in this area. For this reason, the