Prestressed Concrete Rectangular Beams Subjected to Sustained Torque

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Title: Prestressed Concrete Rectangular Beams Subjected to Sustained Torque

Author(s): Atheel E. Allos and Ali H. Rashid

Publication: Structural Journal

Volume: 86

Issue: 4

Appears on pages(s): 469-472

Keywords: beams (supports); creep properties; loads (forces); torsion; post-tensioning; prestressed concrete; prestressing; rectangular beams; reinforcing steels; research; stiffness; strength; tests; torsion tests; Structural Research

Date: 7/1/1989

Abstract:
Paper investigates the long-term behavior of prestressed concrete beams subjected to pure torsion. Tests on eight post-tensioned prestressed concrete beams subjected to sustained torque, together with four companion beams tested to determine the short-term torsional behavior, are reported. The anticipated final coefficient of long-term rotation varied from 1.39 at 3.92. This coefficient was found to increase with an increasing amount of sustained torque applied, a decreasing amount of stirrups, and an increasing amount of prestress.