Torsional resistance of prestressed concrete beams with rectangular section

✍ Scribed by G.D. Stefanou; P. Regan

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 914 KB
• Volume: 40
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(91)90140-v

✦ Synopsis

Matraet-The purpose of the laboratory work presented in this paper is to make observations of the behaviour of prestressed concrete beams when loaded in pure torsion. Predictions from theoretical analysisare compared with the actual behaviour of the tested &arm. The comparisons are made with respect to resistance of inclined cracking and to ultimate load behaviour and NO~NCLATURE area of one leg of a stirrup total area of bonded non-prestressed longitudinal reinforcement area of unbonded pmstres& lon~tu~nal violent shear modulus of concrete cylinder crushing strength of concrete tensile strength of concrete cube crushing strength of concrete initial prestress (at start of loading) of prestressed reinforcement stress in stirrup reinforcement (AIll) stress in longitudinal reinforcement (Ad) yield stress of reinforcement ultimate stress of reinforcement torsional moment of inertia spacing of stirrups torque torque causing torsion cracking maximum torque thickness of walls of truss model iesser overall dimension of cross-section lesser dimension between centre lines of walls of truss model greater overall dimension of cross-section greater dimension between centre lines of wails of truss model ultimate compression stress for cracked concrete angle between compression in concrete and axis of beam stress in concrete in truss model initial prestress of concrete principal tensile stress twist per unit length coefficient accounting for ccrner effects in post cracking phase