同济大学土木材料力学与结构力学考研历年真题

EA ,\rl M mnXYoGh N, = 7866kN, N, = 16 1.34foV\rNt _ 78.66x1()3\r2 = \2\MPa,\r6.5X10\r/V, _ 161.34xl03\r?4- 8.OX1O2 = 202MPa\r2 . 6z{,R|}h'~P€F‚)ƒ„,R\n/=-320><10',\r45.= - 160*10-, . = 180x10-6.Š‹'@)`p??? = 200G4 , ŒŽ 0.3,\r"[F‚)‘,-’0X+.( 1 8\n)\r9:@P-;<“>,-”•\n`)EFG:@P-;)–E—.—˜6™)\rz{,R|Gš‚›œEžŸ ¡¢),R|,£¤¥\.\r]^_\`a.\r% = 2 % .-§ + B.J = T 80 x 10-6\r‘,R«\r¬ ­ ® ¯ * Q ° , 195.7x10-,\r-335.7XW4\r‘,-:\rE 9AQ * 1 Q3\r0 = ²r-7(^+^2)= = µ (195.7-0.3x335.7)x10^ = 20.88MPa\r\-v~\rE 200x1()3\r0 = -~ 7(½2 + V½,)= [ 0 3 2 (-335.7 + 0.3x195.7)x10^^ -60.88MPa\r¸{«\r2ao = arctan 7m7- - = arctan(-0.36) = -19.8°\r_x-_y\ra0 = -9.9°\r$.ax B x ?¹-9.9.