Flexural Cracking Behavior of Pretensioned I- and T-Beams


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Title: Flexural Cracking Behavior of Pretensioned I- and T-Beams

Author(s): Edward G. Nawy and Julius G. Potyondy

Publication: Journal Proceedings

Volume: 68

Issue: 5

Appears on pages(s): 355-360

Keywords: beams (supports); crack width and spacing; cracking (fracturing); flexural strength; I-beams; mathematical models; partial prestressing: prestressed concrete; pretensioning; research; strains;stresses; T-beams.

Date: 5/1/1971

Information is limited on the flexural cracking behavior and crack width development of prestressed beams. Twenty-two pretensioned concrete I- and T-beams having a 9-ft span and prestressed with 1/4 in. diameter 7-wire strands are tested to failure and the results analyzed. A cracking hypothesis for prestressed concrete is presented and an expression relating the maximum weighted crack width to the controlling parameters is given.