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Official Journal of the Japan Wood Research Society

Table 2 Experimental results of nailed, bolted and the combined joints

From: Effective lateral resistance of combined timber joints with nails and bolts

t (mm)

K (kN/mm)

U (kN mm)

P max (kN)

δ P (mm)

P y (kN)

δ y (mm)

P u (kN)

μ

0.2P u (2μ − 1)0.5 (kN)

2/3P max (kN)

P a (kN)

Nailed joints

 60

13.3

260

22.0

5.4

12.5 (9.0)

0.96

20.5

8.64

16.5 (14.2)

14.7 (13.2)

9.0

 90

13.1

231

21.0

4.7

11.0 (9.4)

0.85

19.2

8.78

15.5 (13.7)

14.0 (12.1)

9.4

 120

9.5

256

21.6

6.9

11.8 (8.7)

1.25

20.0

6.56

13.9 (11.1)

14.4 (12.1)

8.7

Bolted joints

 60

12.5

185

21.8

7.4

13.0 (7.2)

1.05

20.7

6.13

13.4 (9.0)

14.5 (7.2)

7.2

 90

7.4

397

34.8

13.8

19.0 (13.6)

2.60

30.4

3.71

15.2 (12.1)

23.2 (14.3)

12.1

 120

6.0

586

40.7

19.4

22.1 (18.7)

3.74

33.7

3.55

16.6 (13.8)

27.1 (24.6)

13.8

Combined joints

 60

8.9

518

43.0

8.8

0.2a (−7.8a)

1.96

42.8

3.13

19.1 (15.9)

28.7 (21.3)

−7.8a

 90

7.8

799

53.6

14.8

64.0b (−5.0a)

5.96

53.3

2.71

22.1 (13.3)

35.7 (27.9)

−5.0a

 120

7.1

982

55.2

16.1

89.5b (−133a)

6.76

54.8

2.86

23.5 (18.7)

36.8 (33.0)

−133a

  1. Parentheses denote 95% lower limit value
  2. t main member thickness, K initial stiffness, U energy capacity, P max maximum load, δ P slip at P max, P y yield load, δ y slip at P y, P u ultimate load, μ ratio of δ u to δ v as shown in Fig. 4, P a short-term allowable resistance
  3. aValue too low or negative value
  4. bValue higher than P max