Behavior of Continuous Prestressed Concrete Beams


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Title: Behavior of Continuous Prestressed Concrete Beams

Author(s): Neil M. Hawkins, Mete A. Sozen, and Chester P. Siess

Publication: Special Publication

Volume: 12


Appears on pages(s): 259-294


Date: 1/1/1965

With discussion by Milik Tichy. The results of 22 tests of two-span continuous prestressed concrete beams are described and analyzed. The pretensioned beams were loaded to failure with concentrated, stationary loads placed at the middle of each span. The variables in the tests were: Shape of cross section, concrete strength, amount of longitudinal reinforcement, effective depth, and web reinforcement. The behavior of the beams is described in terms of deflections, strains, and crack patterns. The characteristic features of failuresunder the primary influence of shear and of flexure are distinguished. The requirements for moment redistribution are discussed. The phenomenon of inclined tension cracking, of critical importance in moment redistribution, is studied quantitatively. The effect of web reinforcement in compensating for the influence of inclined cracking is evaluated.