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5. STÅLKONSTRUKTIONER<br />

19<br />

141. a) S 1<br />

= 47,67 kN (trækstang)<br />

S 2<br />

= 62,23 kN (trykstang)<br />

b) 1. 47,67 · 10 3 N < 177,53 · 10 3 N<br />

2. 62,23 · 10 3 N < 156,23 · 10 3 N<br />

145. q rmax<br />

= 46,65 kN _____<br />

m<br />

146. a) V A<br />

= 20,625 kN V B<br />

= 12,375 kN<br />

b) x = 0,025 m (se figuren)<br />

142. a) V A<br />

= 16,2 kN M A<br />

= 15,18 kNm<br />

b)<br />

c) IPE 140<br />

d) 15180 · 10 3 Nmm < 19325 · 10 3 Nmm<br />

143. a) V A<br />

= 7,14 kN V B<br />

= 9,06 kN<br />

b)<br />

c) INP 140<br />

d) 15310 · 10 3 Nmm < 16514 · 10 3 Nmm<br />

147. INP 260 (I x<br />

= 57,4 · 10 6 mm 4 > I = 56,25 · 10 6 mm 4 )<br />

148. HE 200B (I x<br />

= 57 · 10 6 mm 4 > I = 46,42 · 10 6 mm 4 )<br />

149. a = 371 mm<br />

150. a = 119,35 mm<br />

c) INP 80<br />

d) 3560 · 10 3 Nmm < 4272 · 10 3 Nmm<br />

144. a) V A<br />

= 11,33 kN V B<br />

= 15,67 kN<br />

b) x = 3,78 m (se figuren)<br />

c) HE 120B<br />

d) 21390 · 10 3 Nmm < 30763 · 10 3 Nmm