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Table 2 Data X in the BondSlipNet database.

From: Improved Meta-learning Neural Network for the Prediction of the Historical Reinforced Concrete Bond–Slip Model Using Few Test Specimens

Serial number

Parameter range

#1

#2

#3

#558

Water

0 ~ 2.04

0.58

0.58

0.58

0.83

Cement

0 ~ 1

1.00

1.00

1.00

1.00

Sand

0 ~ 3.33

2.13

2.13

2.13

2.52

Aggregate

0 ~ 6.12

2.93

2.93

2.93

4.82

Fc (MPa)

Compressive strength

21.64 ~ 102.62

35.90

35.90

35.90

44.60

Da (mm)

Maximum aggregate size

0 ~ 31

20.00

20.00

20.00

20.00

fy (MPa)

Rebar yield strength

206 ~ 1374

410.00

410.00

410.00

422.00

c (mm)

Concrete cover thickness

20 ~ 225

45.25

45.25

45.25

63.00

ds (mm)

Rebar diameter

6 ~ 50

9.50

9.50

9.50

14.00

As (mm2)

Rebar area

28.27 ~ 1963.5

70.88

70.88

70.88

153.94

S (mm)

Stirrup spacing

0 ~ 240

0.00

0.00

0.00

0.00

dsv (mm)

Stirrup diameter

0 ~ 10

0.00

0.00

0.00

0.00

Es (MPa)

Rebar elastic modulus

157,575 ~ 257,536

203,000

203,000

203,000

209,000

Ec (MPa)

Concrete elastic modulus

1523 ~ 44,240

31,580

31,580

31,580

33,579

Esv (MPa)

Stirrup elastic modulus

0 ~ 210,000

0.00

0.00

0.00

0.00

L (mm)

Embedded length

15 ~ 370

40.00

60.00

80.00

70.00

Sr(mm)

Rib spacing

0 ~ 15

5.92

5.92

5.92

9.00

Lr (mm)

Rib top length

0 ~ 3

1.33

1.33

1.33

1.06

Lb (mm)

Rib bottom length

0 ~ 4.8

2.11

2.11

2.11

3.14

Hr (mm)

Rib height

0 ~ 1.82

0.52

0.52

0.52

1.40

Alpha (°)

Rib angle

0 ~ 90

65.00

65.00

65.00

53.20

Degree of decay (%)

0 ~ 13.5

0.00

0.00

0.00

0.00

Ac (mm2)

Concrete section area

3632 ~ 250,000

7854

7854

7854

19,600.00

Coefficient of friction

-1 ~ 1.5

1.00

1.00

1.00

1.00

Number of test pieces

/

18

36

Task type

/

AcirBpla CnorDnstiEnor

AcirBpla CnorDnstiEnor

AcirBpla CnorDnstiEnor

AsquBpla CnorDnstiEnor

Reference

/

Yeih et al., (1997)

Qi et al., (2020)

  1. Due to the large number of samples, this table is only an example. More details can be found in the Additional file 1, which can be published with this paper online. The water, cement, sand and aggregate are the relative values, assuming that the value of cement is 1