Design of Longitudinal Reinforcement for Slabs
The design of reinforcement is performed for load caused by the bending moment M*. The program provides the required area of tensile and compressive (if needed) reinforcement. It takes into account conditions for the minimum and maximum degree of reinforcement in a given cross-section. First, the program determines the location of neutral axis as:
Providing the location of neutral axis is less than the allowable one (c < 0.75cb), the program determines the area of tensile reinforcement Ast from the expression:
Providing the location of neutral axis is greater than the allowable one (c > 0.75cb), the program determines the areas of both compressive Asc and tensile Ast reinforcement from the expressions:
The limit location of neutral axis is found from:
The computed degree of reinforcement is checked using the following expressions:
If the maximum degree of total reinforcement ρmax is exceeded, the program informs the user that the longitudinal reinforcement cannot be designed for a given cross-section.