Table 1 Variable names and descriptions for the statistical analysis.

Variable part of the ACI prediction equation

\(v_{ACI}\)

Continuous

Variable part of the AASHTO prediction equation

\(v_{AASHTO}\)

Continuous

Loading type

\(LT\)

Categorical

Total span length

\(L\)

Continuous

Beam height

\(h\)

Continuous

Beam width

\(b\)

Continuous

Depth to prestressing reinforcement

\(d_{ps}\)

Continuous

Area of prestressing reinforcement

\(A_{ps}\)

Continuous

Ultimate tendon strength

\(f_{pu}\)

Continuous

Concrete strength

\(f^{\prime}_{c}\)

Continuous

Area of mild reinforcing steel on tension face

\(A_{s}\)

Continuous

Yield strength of mild reinforcing steel

\(f_{y}\)

Continuous

Depth to tension mild reinforcing steel from compression face

\(d_{s}\)

Continuous

Area of mild reinforcing steel on compression face

\(A_{s}^{'}\)

Continuous

Depth to compression mild reinforcing steel from compression face

\(d_{s}^{'}\)

Continuous

Effective stress in the prestressing reinforcement at time of testing

\(f_{pe}\)

Continuous

Modulus of elasticity of the prestressing reinforcement

\(E_{ps}\)

Continuous

Stress increase in unbonded tendons

\(\Delta f_{ps}\)

Continuous