Resistance of rectangular solid sections subjected to torsion and shear: the condition for minimum reinforcement

For approximately rectangular solid sections, only minimum reinforcement is required if the following condition is satisfied:

where:

T_Ed

is the design torsional moment

V_Ed

is the design transverse force

T_Rd,c

is the torsional cracking moment

TRd,c = 2 Ak tef,i fctd

(6.26) while setting τt,i = fctd

with

A_k

the area enclosed by the centre-lines of the connecting walls, including inner hollow areas, see Figure 6.11

t_ef,i

the effective wall thickness, see Figure 6.11

f_ctd

the design tensile strength of concrete, see § 3.1.6 (2)P.

V_Rd,c

is the design shear resistance of members not requiring design shear reinforcement .