Design of longitudinal reinforcement for plates

The design of reinforcement is performed for loading caused by the bending moment M_sd. 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 (x<x_max), the program determines the area of tensile reinforcement A_st from the expression:

Providing the location of neutral axis is greater than the allowable one (x>x_max), the program determines the areas of both compressive (A_sc) and tensile (A_st) reinforcement from the expressions:

The limit location of neutral axis is found from:

	for concrete C40/45 and lower
	for concrete C45/50 and higher

The minimum area of tensile and compressive reinforcement, respectively, is determined in the same way as for a rectangular cross-section reinforced

on one side.

If the maximum degree of tensile reinforcement (ρ_t,max=0.04) or compressive reinforcement (ρ_max=0.08), respectively, is exceeded, the program informs the user that the longitudinal reinforcement cannot be designed for a given cross-section.