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Official Journal of the Japan Wood Research Society

Table 2 Summary of the rotation tests results of Rs and Rl types

From: Reinforcing effect of hardwoods on the moment resistance performance of traditional Japanese “nuki”-column joints

Type

W.S.

\(b_{\text{r}}\) [mm]

\(\rho\) [\({\text{kg/m}}^{ 3}\)]

\(M_{\text{max} }\) [kN mm]

\(M_{\text{y}}\) [kN mm]

\(K\) [k Nm/rad.]

Ave.

SD

Ave.

SD

Ave.

SD

Ave.

SD

Rs

Si

12

936

32.9

741

54.8

454

121

13.7

1.82

18

946

17.3

816

131

570

23.2

14.5

0.780

24

928

21.1

827

157

512

134

18.2

5.00

K

12

546

34.3

650

82.1

372

33.8

12.5

3.23

18

543

29.6

641

108

374

61.6

11.0

1.86

24

551

13.8

618

60.1

339

8.68

17.8

10.3

H

12

434

3.93

695

15.3

408

51.9

11.3

2.62

18

425

10.4

691

49.5

425

53.0

14.3

5.22

24

437

14.2

743

83.5

503

122

10.3

0.874

Rl

Si

12

936

32.9

974

46.4

600

48.9

20.0

1.11

18

946

17.3

1034

145

563

84.5

17.7

2.14

24

928

21.1

1214

146

755

125

19.4

2.78

K

12

546

34.3

778

128

445

89.6

17.3

4.75

18

543

29.6

853

129

475

72.1

22.0

2.28

24

551

13.8

729

63.3

443

31.9

15.8

3.66

H

12

434

3.93

771

126

438

86.1

16.7

3.02

18

425

10.4

757

61.8

436

42.4

15.6

2.86

24

437

14.2

720

82.3

432

45.4

13.7

2.44

  1. W.S., wood species of reinforcements (Si, K, H and Su represent shirakashi, kuri, hinoki and sugi, respectively), \(b_{\text{r}}\): see Fig. 1; \(\rho\), density of reinforcements; \(M_{ \text{max} }\), maximum moment; \(M_{\text{y}}\), yield moment; \(K\), elastic rotational stiffness; Ave., average; SD, standard deviation