TORSION AND BENDING IN REINFORCED AND PRESTRESSED CONCRETE MEMBERS

WITH RESPECT TO ULTIMATE STRENGTH, PRESTRESSED MEMBERS CAN BE TREATED AS NONPRESTRESSED MEMBERS WITH AN EQUIVALENT AMOUNT OF NORMAL REINFORCEMENT. THE THEORY FOR REINFORCED BEAMS CAN THEREFORE BE EXTENDED TO REINFORCED AND PRESTRESSED BEAMS. THE EXPERIMENTAL BEHAVIOR OF REINFORCED CONCRETE BEAMS UNDER TORSION CONFIRMED THE VALIDITY OF A SPACE TRUSS MODEL. THIS TRUSS FAILURE MODEL FORMS THE BASIS OF THE ULTIMATE STRENGTH THEORY FOR GENERAL CROSS SECTIONS IN TORSION AND BENDING AND IS DEMONSTRATED AND DIAGRAMMED HEREIN. REFERENCE IS MADE TO THE CEB (COMITE EUROPEEN DU BETON) CODE, WHICH BASES ITS NEW TORSION REQUIREMENTS ON THIS SPACE TRUSS THEORY. /AUTHOR/