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Official Journal of the Japan Wood Research Society

Table 3 Results with the concentrated mass for the actual size round bar

From: Application of the vibration method with additional mass to timber guardrail beams

Attaching surface of the concentrated mass

Attaching method of the concentrated mass

End condition

Specimen

Vertical vibration

Horizontal vibration

Top

Two-sided adhesive tape

Hanging with two threads

Cedar3

0.89 (1,1)

1.45 (1,2)

Cedar4

0.91 (1,1)

− 4.37 (1,2)

Cedar5

1.06 (1,1)

− 5.96 (1,2)

Top

Two-sided adhesive tape

Iron round bar insertion

Cedar3

1.04 (2,1)

− (2,2)

Cedar4

0.72 (2,1)

− (2,2)

Cedar5

1.20 (2,1)

− (2,2)

Top

Two-sided adhesive tape

Loose attachment to the post

Cedar3

1.02 (3,1)

− 3.40 (3,2)

Cedar4

1.08 (3,1)

− 458.80 (3,2)

Cedar5

1.06 (3,1)

− 5.40 (3,2)

Top

Two-sided adhesive tape

Tight attachment to the post

Cedar3

1.99 (4,1)

− 2.71 (4,2)

Cedar4

2.35 (4,1)

− 7.96 (4,2)

Cedar5

1.78 (4,1)

− 10.25 (4,2)

Top

Wood screw

Hanging with two threads

Cedar3

0.99 (5,1)

0.81 (5,2)

Cedar4

0.95 (5,1)

0.57 (5,2)

Cedar5

1.05 (5,1)

0.51 (5,2)

Top

Wood screw

Iron round bar insertion

Cedar3

1.37 (6,1)

− (6,2)

Cedar4

0.72 (6,1)

− (6,2)

Cedar5

1.26 (6,1)

− (6,2)

Top

Wood screw

Loose attachment to the post

Cedar3

1.07 (7,1)

0.94 (7,2)

Cedar4

1.07 (7,1)

0.63 (7,2)

Cedar5

0.96 (7,1)

0.53 (7,2)

Top

Wood screw

Tight attachment to the post

Cedar3

0.56 (8,1)

0.87 (8,2)

Cedar4

0.55 (8,1)

0.74 (8,2)

Cedar5

0.77 (8,1)

0.59 (8,2)

Side

Wood screw

Hanging with two threads

Cedar3

0.84 (9,1)

1.03 (9,2)

Cedar4

0.69 (9,1)

0.87 (9,2)

Cedar5

− 0.55 (9,1)

0.97 (9,2)

Side

Wood screw

Iron round bar insertion

Cedar3

0.96 (10,1)

− (10,2)

Cedar4

0.55 (10,1)

− (10,2)

Cedar5

− 0.52 (10,1)

− (10,2)

Side

Wood screw

Loose attachment to the post

Cedar3

0.79 (11,1)

0.97 (11,2)

Cedar4

0.54 (11,1)

0.80 (11,2)

Cedar5

− 0.53 (11,1)

1.24 (11,2)

Side

Wood screw

Tight attachment to the post

Cedar3

0.41 (12,1)

0.95 (12,2)

Cedar4

0.30 (12,1)

1.19 (12,2)

Cedar5

− 0.48 (12,1)

1.46 (12,2)

  1. The estimation accuracy of the vibration method with additional mass are expressed by the ratio of the weight calculated by the vibration method with additional mass to that measured by a platform scale. Testing conditions are shown in parentheses