1 1 1.1 1.1.1 (1) 1.1 1.2 1.1 (kn/m 3 ) 77 71 24.5 23 21 8.0 22.5
2 1 1.2 N/m 2 2 m 3 m 2000 2200 2500 3000 (2) 1 A B B 1.3 1.5 1.1 T cm
1.1 3 1.3 L m L 4 L > 4 1.0 L 32 + 7 8 1.2 T
4 1 2 5.0 kn/m 2 3. (3) i = 0.4 i = 0.3. (4) 10
1.1 5 (5) 1.3
6 1 (6). p =c g A c : p : kn g : kn/m 2 A : m 2 1.4
1.2 7 1.2 (1) 1.5 N/mm 2 2.0 10 5 PC PC PC 2.0 10 5 (2) n 15 1.6 N/mm 2 21 24 27 30 N/mm 2 2.35 10 4 2.5 10 4 2.65 10 4 2.8 10 4
8 1 1.3 1.3.1 (1) 50 1.7 N/mm 2 210 210 SS400 l/r 5 18 210 18 < l/r 5 92 [140» 0.82(l/r 18)] 1.5 1200 000 92 < l/r 1.5 6 700 + (l/r) 2 l mm r mm l/b 5 4.5 210 4.5 < l/b 5 30 [140 2.4(l/b) 4.5] 1.5 120 315 l mm b mm 100 80 135 285 315 355 1...
1.3 9 (2) 1.8 N/mm 2 205 205 SS400 l/r 5 205 20 < l/r < 93 [140» 0.84(l/r 20)] 1.5 1200 000 93 5 l/r 1.5 6 700 + (l/r) 2 l mm r mm l/b 5 4.5 205 4.5 < l/b 5 30 [140 2.4(l/b) 4.5] 1.5 120 315 125 285 l mm b mm 100 90 (3) 1.9 N/mm 2 ft fb fs STK400 210 210 120 STK500 240 240 120.
10 1 (4) 1.10 N/mm 2 SR235 SD295 A SD345 SD295B 210 270 300 210 270 300 51 mm. 1.3.2 H SS400 σ c σ + ( bcy σ caz σ bagy 1 σ c σ c + σ bcy ( 1 σ c σ eay ) + ) + σ beay σ bcz ( 1 σ c σ eaz σ ( bcz σ bao 1 σ ) 1 c σ caz ) σ cae σ c N/mm 2 σ bcy σ bcz N/mm 2 σ caz N/mm 2 l/r 18 210 N/mm 2 18 < l/r 92 [140 0.82(l/r 1.8)] 1.5 N/mm 2 [ ] 1200 000 l/r > 92 6700 + (l/r) 2 1.5 N/mm 2
1.3 11 b 13.1t σ bagy N/mm 2 l/b 4.5 210 N/mm 2 4.5 < l/b 30 [140 2.4(l/r 1.8)] 1.5 N/mm 2 2A c Aw b l mm Ac cm 2 Aw cm 2 σ bao 210N/mm 2 σ bae 210N/mm 2 b 13.1t σ eaz σ eay N/mm 2 ( ) l 2 σ eay = 1200 000/ r y ) 2 ( l σ eaz = 1200 000/ r z l mm r y mm r z mm
12 1 1.4 b, t 1.3.3 (1) 1.11 N/mm 2 σ CK 21 24 27 30 10.5 12.0 13.5 15.0 8.0 9.5 11.0 12.5 0.33 0.35 0.36 0.38 τ a1 2.40 2.55 2.70 2.85 τ a2 1.05 1.20 1.27 1.35 2.10 2.40 2.55 2.70
1.3 13 (2) 1.12 (σ a ) (τ a ) F C 2 F C 6 F C N/mm 2 1.3.4 1.13 N/mm 2 12.0 13.5 1.05 9.0 10.5 0.75 13.5 19.5 2.1 10.5 15.0 1.5 10.5 13.5 0.9
14 1 1.4 (1) Ra = 1 n Ru Ru = q d A + UΣl i f i RakN/ n n = 2 Ru Rd A + U Σli fi kn/ q d = 200αN kn/m 2 A (= a b)m 2 1.5
1.4 15 U = 2(a + b) m li m fi kn/m 2 fi = 2 βn s fi = 10β N N c c N fi = β N N c c c α Ns N N = 50 Nc N c = 150 kn/m 2 β 1.14 α α 1.0 1.0 1.0 0.0 1.0 1.15 β β 1.0 0.9 1.0 0.5 1.0
16 1 (2) 1 N 30 N 10 3 m 1.16 H-400 600 kn H-350 450 kn H-300 300 kn 2 1 Ra = 1 2 Ru Ru = 200NA + 10 (Nc Ac + 15 ) Ns As αβ (kn) N N A (m 2 ) 1.6
1.4 17 1.17 α 0.8 0.5 1.0 1.0 Nc N Ac Ul c (m 2 ) Ns N As Ul s (m 2 ) α β 1.0 0.5 U 2(a + b) (m) l c (m) l s (m)
18 1 1.5 Chang 1 β = 4 KH D 4E I (m 1 ) β (m 1 ) rad K H kn/m 3 K H = K HO ( BH 0.3 ) 3 4 K HO = 1 0.3 αe o K HO (kn/m 3 ) B H (m) D B H = β α E o (kn/m 2 ) 2 M o = 1 + βh 2β H o M m = H ( o 1 + (βh)2 exp tan 1 1 ) H o 2β βh
1.5 Chang 19 M o kn m M m kn m h (m) H o 1 (kn) H o = H n H (kn) n 3 Cang 1.7 δ = H o h 3 12EI (1 + βh)3 + 2 (βh) 2 4 l m = 1 β tan 1 1 βh
20 1 5 H I y I z 1.8 H 1.6 1 δ = W C { ( ) } l l 2 6 E I 4 2 C3 + C3 4 64 W EN/mm 2 I mm 4 l m C 2 δ c = P l3 48 E I + P (l 2a) 48 E I { 3l 2 (l 2a) 2}
1.6 21 1.9 P EN/mm 2 I mm 4 3 1.10 δ c = q(l 2 a)4 384 E I + q b l(1.5l2 b 2 2bc 2c 2 ) 48 E I
22 1 q EN/mm 2 I mm 4 4 δ = 5w o l 4 384 E I w o N/cm 8 Me max w o = (1 + i)/l 2 Me max (N cm) l (cm) i EN/cm 2 I cm 4 1/400 25 mm 25 mm