Reinforced Concrete Design II

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Presentation transcript:

Reinforced Concrete Design II Lecture 9 Dr. Nader Okasha

Biaxial Bending

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns The Bresler Equation

Biaxial bending in columns Interaction diagrams for biaxial bending

Biaxial bending in columns Design Procedure for biaxial bending: A- Determine reinforcement based on the biaxial bending capacity: 1- Determine the dimensions based on a reasonable stress in the column. 2- Determine g in the week axis direction (any direction for square sections. 3- Calculate the biaxial bending moment in the week axis direction. 4- Use an interaction diagram to design the reinforcement for the section. B- Use the Bresler equation to check the axial capacity of the section 1- Calculate Pnx from the interaction diagram assuming only Mnx is applied. 2- Calculate Pny from the interaction diagram assuming only Mny is applied. 3- Calculate P0. 4- Calculate Pn and check

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns

Biaxial bending in columns