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Table 6 Evolutionary parameters.

From: Development of Mapping Function to Estimate Bond–Slip and Bond Strength of RC Beams Using Genetic Programming

Parameter

\({\varvec{\tau}}_{{\text{p}}} - {\varvec{s}}\) relationship

(Bond slip of pull-out data set)

\({\varvec{\tau}}_{{\text{p}}} - {\varvec{\tau}}_{{\text{b}}}\) relationship

(Mapping function)

Instruction

\(f^{\prime}_{{\text{c}}}\), \(c\), \(d_{{\text{b}}}\), \(A_{{{\text{st1}}}} /S_{{{\text{st}}}}\), \(s\),

\(+\), \(-\), \(\times\),\(\div\)

\(f^{\prime}_{{\text{c}}}\), \(c\), \(d_{{\text{b}}}\), \(A_{{{\text{st1}}}} /S_{{{\text{st}}}}\), \(\tau_{{\text{p}}}\),

\(+\), \(-\), \(\times\),\(\div\)

Initialization

Method

Ramped half and half

Depth

1 ~ 4

Ratio

50%

Population size

1000

100,000

Selection

Method

Tournament selection

Size

7

Crossover rate

Probability

90%

Max. size

40

30

Mutation rate

Probability

10%

Max. size

40

30

Depth of mutation trees

0 ~ 2

Generation

250

50

  1. *\(\tau_{{\text{p}}}\): Bond–slip function for pull-out specimens.