试件编号

P_y/

kN

Δ_y/

mm

P_u/

kN

Δ_u/

mm

μ_Δ

$\frac{{\Delta }_u}{L}$

P_L/200/

kN

P_0.2/

kN

Δ_0.2/

mm

B1

24.5

21.8

27.1

52.3

2.40

1/57

18.2

18.1

15

B2

34.7

20.6

44.0

58.5

2.84

1/51

27.3

24.0

12.9

B3

13.6

22.8

19.9

79.2

3.47

1/38

9.2

7.3

10.8

B4

24.6

32.9

28.9

69.9

2.12

1/43

12.4

22.6

28.1