Внутренние силы и деформации ферм

Hble anaqemu1 peaKa.eii: A H B, cTpo.R Ha Hali}leHHHX ~A., c Anp u B,. c Bnp napaJIJ1eJiorpaM1» CHJI. ToqKy 0 Ha qmr. l l 3a (nepeceqeH.ee CEJI A n B) Ha.nnemHT Tenep1> npHHHTl> aa IIOJIIOC, npn noMolf(n KOToporo nocTpoeua Kpnsa.a naeJJe-HHJJ, yKa3aHHa.H Ha qmr. 113 (1-II-l l l-IV HT. Jl.). HatiaH nocTpoeeae c rnapHHpa a, Kp.eaa.H .lJ.aBJieHH.H npoii}leT qepea OCTaJil>Hbie mapHHpbI c H b. RplIBa.H )laBJieHH.II <>oJiee acero OTKJIOH.HeTC.H OT OCH B 3-el\l IllBe (nocne neaoro onopaoro ), r}J.e OTRJIOHeHne (al\cI.J,eHTpncuTeT) paaeH C= 11 C.A£. CooTaeTcTByK>lf(aSI 3TOMY ceqeHHIO paaHO}leiicTBYIOll\a.H paaea OT-peaKy IV (qmr. 113a). 3Ty pa1 HO}leiiCTByIOI.f(yIO paCKJia}lbIBaeM Ha B0pM8JTbHYIO CHJiy N. H nonepe1rnyIO Q4 (qrnr. 113a). N4=13 m (no :r.iacmra6y). cl>ur. 114. TaKHM o6paao.M ea1160Jinl1Iee Hanp.HmeHBe cmaTE.H B aroM ceqeHHB paeHO: a =--1 -=-I --· -· = 6 l 'ln/.w=861 'KZ'c.M-N ( + 6c ) t 3 ( + G · 0, 11) S o ., F a 0,4 0,45 ' ' 1 • n pacTSI3KeHHe a=~ ( 1 -~) = -21,1 rn/.M/! = -2,1 ?."2/c.M2, 1lTO MOmHO C1lHTaTD .ll,OnycTHMbil\l. 59. Onpe}leJIHTh onopHue peaKD.HE B TpexnpoJieTHoii apoqnoii KOH-cTpyKu,1rn, H3o6pruKeHHOH Ba cp.er. 114. Y Ka a a H n e. BHaqaJie onpe.z:cenSIIOTC.H pt>aKI{JIH nepeKEJlHbIX 6a-JIOqeK, oT KOTopux onpcJleJISIIOTC.H peaKU,HR Kpaiieux apoK. Cpe.z:cHHif npoJieT paccqnTuBaeTc.H Ha .u.eiicTane o6paTHbIX no HanpaaneHJJIO peaKn.eii npnKpenJI.HeMbIX KOHcTpyKu.e:H. 60. Onpe)leJIRTn ycnJIR.H B cTepmB.HX 02, U2, D2 n V2 Tpexmap-HRpno:E: cpep.Mu, noKaaaHH0:0: ea cp11r. 115. 2 2v2 v2 Omeem. V =P· H=-P· 0.,=--P· U.,=-·-· P· ' 3 • -3 , _ 3 ' I 1 D2=-s P; V2=-aP. 61. Onpe.u.eJIHT]) ycHJIH.H B pa6oTaIOllIHX CTepatH.HX H OTMeTRTb He-pa6oTaIOI.f(He B KOHCTpyKa.RH, IlOKa3aHH0:0: Ha cpHr. 116. 33