... ba)45cos(FFFRVQ))45cos(VQVQ( 032 1x11 033 22−−+=ρ−ρ+ρ)45sin(FR)45sin(VQ03y 033 +=ρ−V1F1xV2F2s/vàos/rasĐLĐL)F(∑∑∑−=s/m287.5VV;s/m305.5AQV 231 11====450D1212d33dV3FyRxRyR)45sin(FR)45sin(VQ3y 33+ =ρ−( ) 232 22112222112pp5000097Pa2VVppg2VVpp=⇒=−ρ+=⇔−+γ=γ2 837 306N;ApFF 5654867N;ApF22 231 11=====)45cos(FFFVQ))45cos(VQVQ(R 032 111 033 22x++−ρ−ρ+ρ=⇒)45sin(F)45sin(VQR 030 33y−ρ−=Thế ... 5654867N;ApF22 231 11=====)45cos(FFFVQ))45cos(VQVQ(R 032 111 033 22x++−ρ−ρ+ρ=⇒)45sin(F)45sin(VQR 030 33y−ρ−=Thế số: Rx =-8 16, 038 KN; Ry =-2 017,4 93 KN; R=2176,281 KN3V3F3Chứng minh hệ số αααα, αααα0>1:dAVu∆V(A1dAVuA12VVAρudA2uρDNDNαA3A32A2V±====∫∫∫∫∫∫that0udAudAQQdA)uV(udAuVuAAAA====∆∆∆∆⇒⇒⇒⇒∆∆∆∆±±±±====⇒⇒⇒⇒∆∆∆∆±±±±====⇒⇒⇒⇒∆∆∆∆±±±±====∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫∫Löu ... raèng:1dAVu∆dAVu∆2dAA1dAVu∆u∆V2V(A1dAVu∆V(A1dAVuA1VAVρuudAρDLDLαA22AAA222A3A2AV0>+±=+±=±====∫∫∫∫∫∫∫∫∫∫∫∫∫∫that1dAVu∆dAVu∆3dAVu∆3dAA1dAVu∆u∆V3u∆V3V(A12A33A22AAA 332 23& gt;±+±=±+±=∫∫∫∫∫∫∫∫∫∫...