Title:
Ultimate Flexural Strength of Prestressed and
Conventionally Reinforced Concrete Beams
Author(s):
Jack R. Janney, Eivind Hognestad, and Douglas McHenry
Publication:
Journal Proceedings
Volume:
52
Issue:
2
Appears on pages(s):
601-620
Keywords:
no keywords
DOI:
10.14359/11618
Date:
2/1/1956
Abstract:
Based on experimental and analytical studies of flexural behavior and ultimate strength of beams, the relative performances of various types of prestressed and conventional reinforcement are compared. Test results of 19 rectangular beams are given, involving (1) three pre-tensioned, (2) three post-tensioned grouted, (3) five post-tensioned unbonded, (4) three post-tensioned unbonded with deformed bars added, and (5) five with conventional deformed bar reinforcement. For three reinforcement percentages, the characteristics of these five types of reinforcement are compared in terms of moment-deflection relationships, deflection recovery, and ultimate strength of beams failing in flexure. An ultimate strength analysis permitted prediction of measured ultimate moments for all beams with satisfactory accuracy.