Table 2 Statistical features of database.

Aspect ratio (\(M/Vl_{{\text{w}}}\))

0.25–4.1

Axial load ratio (\(P/f_{{\text{c}}} A_{{\text{g}}}\))

0.0–0.5

Boundary element area to area of cross-section ratio (\(A_{{\text{b}}} /A_{{\text{g}}}\))

0.0–0.44

Gross cross-sectional area (\(A_{{\text{g}}}\)—\({\text{mm}}^{2}\))

7800–825,400

The ratio of length to thickness of the wall (\(l_{{\text{w}}} /t_{{\text{w}}}\))

4.35–57

Compressive strength of concrete (\(f_{c}\)—MPa)

13.7–130.8

Web reinforcing ratio in horizontal direction (\(\rho_{{{\text{hw}}}}\))

0.0–0.037

Web reinforcing ratio in vertical direction (\(\rho_{{{\text{vw}}}}\))

0.0–0.037

B. E.* reinforcing ratio in horizontal direction (\(\rho_{{{\text{hb}}}}\))

0.0–0.13

B. E. reinforcing ratio in vertical direction (\(\rho_{{{\text{vb}}}}\))

0.0–0.1

Yield strength of horizontal reinforcement (MPa)

Web (\(f_{{{\text{y}},{\text{hw}}}}\))

0.0–1262

B. E. (\(f_{{{\text{y}},{\text{hb}}}}\))

0.0–1253

Yield strength of vertical reinforcement (MPa)

Web (\(f_{{{\text{y}},{\text{vw}}}}\))

0.0–1001

B. E. (\(f_{{{\text{y}},{\text{vb}}}}\))

0.0–776