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The Structural Engineer, Volume 60, Issue 15, 1982
80 pin-ended and 12 simply supported beams were tested by dropping a nominally rigid striker onto the beam at midspan. For each test the impact force history and the beam displacements (maximum and residual) were measured. G. Hughes and A.W. Beeby
This paper describes the development of post-tensioned brickwork beams and their behaviour up to failure under short-term loading. The brickwork section was specially designed for ease of construction and grouting of the tendons. The test results of 15 post-tensioned beams, with spans ranging from 2 m to 6 m, are given. The ultimate moments obtained from the tests are compared with the theoretical moments derived from a simplified cubic parabolic stresdstrain relationship of the brickwork, and it is shown that the ultimate moment of post-tensioned brickwork can be closely predicted by this method. R. F. Pedreschi and B. P. Sinha
Dr. L. A. Clark (M) (University of Birmingham): This paper is most welcome since, in the past, equations for predicting strains and crack widths in reinforced concrete members have been applied to composite members-sometimes with misleading results. The present paper shows how strains in composite members can be predicted accurately, and the writer looks forward to seeing the publication of the authors’ reference 10, which will be concerned with crack width prediction in composite members.