Relationships between material properties and section ductility of prestressed high-strength concrete beam

Material properties using in structure or member are related to itself, but not equal to. Based upon the plane section presumption of bending members and the code for design of concrete structure GB50010 (2002), the curvature ductility factor of prestressed high-strength concrete flexural member is given out. The effect on the section ductility of the strength and ultimate compressive strain of concrete, the yield strength and even percentage elongation of steel, and the reinforced index is discussed. The least even percentage elongation and balanced reinforcement ratio that can assure the bending members do not cause destruction of the steel bar's rip is given on condition that different concrete strength. At the same time, available ductility capacity of beams designed as Code is given under static conditions. Some conclusions can be applied to structural design of such bending members.