Resistance of members subjected to torsion and shear

The resistance of a member subjected to torsion and shear is limited by the capacity of the concrete struts. The following condition should be satisfied:

where:

T_Ed

is the design torsional moment

V_Ed

is the design transverse force

T_Rd,max

is the design torsional resistance moment,

TRd,max = 2 ν αcw fcd Ak tef,i sinθ cosθ

(6.30)

with

ν

the strength reduction factor for concrete cracked in shear, see § 6.2.2 (6) for national choice

α_cw

see Note 3 in § 6.2.3 (3)

f_cd

the design compressive strength of concrete, see § 3.1.6 (1)P

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

θ

the angle of compression struts,
see Figure 6.5 for description,
see § 6.2.3 (2) for national choice.

V_Rd,max

is the maximum design shear resistance, according to:
• Expressions (6.9) for members with vertical shear reinforcement,
• Expressions (6.14) for members with inclined shear reinforcement.