1 Reinforced Concrete Design II Lecture 9 Dr. Nader Okasha
Dec 21, 2015
12
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 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 un PP