7.4 橋梁用防護柵 - hkd.mlit.go.jp

1 3-7-32 (1) ( ) (2) ( ) SP (3) (2) ( 20 1 ) SP P ( ) ( ) 3-7-33 (1) ( ) ( ) (km/h) ( ) ( )(kJ) C Cm Cp 25 26 15 45 B Bm Bp 30 60 A Am Ap 45 130 SC SCm SCp 50 160 SB SBm SBp 65 280 SA SAm - 80 420 SS SSm - 100 650 Is 12 m ( sin )2 Is (kJ) m (t) V (km/h) ( ) (2)

2 80km/h A,Am SB,SBm SS 60km/h SC,SCm SA 60km/h B,Bm,Bp A,Am,Ap,SC SB,SBp 50km/h C,Cm,Cp B,Bm,Bp,SC ) ) 40km/h C,Cm,Cp V m3-7-34 (1) a (1) 1) 4m 2) (2) 1) 2) 3) 4) 1 2 40km/h 3-7-35 b Case2 (1) 1) 2) (2) 1) Case1 2) 2)

3 Case1 Case2 2 SP Case1 Case2 2 SP 1 2 40km/h 3-7-36 c (1) (2) 1 3 3-7-37 (2) ( ) 3-7-38 (1) (2) (mm) 1 (m) (cm) (kN m) 2 ( ) ( )1 C 40 25 23 17 6 90 , 100 25 ,60 B 45 30 26 17 9 A 55 45 50 36 14 SC 65 55 66 49 17 SB 75 70 89 68 21 SA 75 70 110 68 42 1 2 2 (3) 110cm (4) (1) 2 (2)

4 90cm 100cm 1 110cm (3) 3-7-39 (1) (V=60km/h ) SC ( ) (V=80km/h ) SB ( ) (2) (I)2 2 (3) ( )1) (kJ) F(kN) SC(25t-50km/h-15 ) 160 43 SB(25t-65km/h-15 ) 280 58 1) - - ( ) My ( ) Mx (My) My F L R (1- ) (kN m) ( ) R = F (kN) L F (m) (F ) B (m)=2 L (Mx) Mx F R (kN m) ( ) R = 3-7-40 ( 110cm) ( ) (1) SP 2,500N/m 980N/m (2) 110cm 2,500N/m 3-7-41 (1) 40cm 10cm (2) 60cm 25cm 6cm (3)

5 50cm 20cm 6cm ( 55 ) 40cm10cm 2 60cm25cm 6cm2 20cm 6cm 50cm3-7-42 (1) ( ) ( 40cm) ( ) 25cm (2) (3) 1) 20cm 2) 25cm (4) ( 21 1 ) 2 (1) 50m 25cm (2) 2 + I (3) 2-2 3-7-43 ( 16 3 )

6 1 3-7-44 (1) (2) ( 16 3 ) (1) JIS 20 m (a)(b) 6 (2) 1 ( ) YR 1 28 ( 16 ) 3-7-45 (a) (ZC-1) (g/ ) ( m) (20 C) (ISO Sa1) ( ) 4 (7 ) 1 ( )200 (160) 40 1 10 1 ( )170 (140) 30 1 10 1 ( )140 (120) 25 )1 )

7 2 (b) (Rzc-1) (g/ ) (20 C) 1 4 200 1 10 170 1 10 140 1 ISOSa1 3-7-46 (1) ) (7) (2) ) (8) (3) ) (9) (4) (10) (5) ( ) (11) (6) ( ) (12) 15cm (1) ( 21 1 ) (2) ( 16 3 ) 3-7-47 N - Ms k P hBo (kN m/m) P (kN) k (= ) h (m) Bo (m) ( 1/2) Bo Lp Lp (m) 3-7-48 (1) (2) (1) 120 (2)

8 3-7-49 (1) (2) 2 (1) 6 (2) 2 3-7-50 (1) 10 (2) (3) 3-7-51 (1) (2) (3) (1) 1) a) b) c) 2) a) b) ) c) d) 3) a) b)

9 C) 4) a)