Unity Design Method for Sections under Service Loads from Pre-stressed Concrete Members to Reinforced Concrete Members using Interaction Diagram between Bending Moment and Pre-stressing Force

Abstract

This report introduces investigations on unity design method for sections under service loads from pre-stressed concrete members (PC) to reinforced concrete members (RC) using bending moment versus compression force diagram. Main contents are as follows. (1) Design processes for sections of PC～RC can be visualized on bending moment-versus pre-stressing force plane. (2) Equations to estimate relations between pre-stressing force, tensile reinforcement ratio and its stress for pre-stressed reinforced concrete members (PRC) are derived. (3) Practical exercises are presented to understand the design method easily for PC and PRC beam sections.