Torsion - Unified Theory of Concrete Structures - page 313

Figure 7.7 Flow chart for torsional analysis

7.1.5.6 Solution Procedure

A set of solution procedures is proposed as shown in the flow chart of Figure 7.7. The
procedures are described as follows:

Step 1: select a value of strain in the d -direction, ε d ;

Step 2: assume a value of strain in the r -direction,

ε r ;

Step 3: calculate the softened coefficient ζ , the averaging coefficient k 1 , and the concrete

stresses σ d from Equations [14], [13], and [12], respectively;