Official Journal of the Japan Wood Research Society
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) |