Computer analysis of beam of varying depth. The reinforced concrete bridge girder, attache...

Computer analysis of beam of varying depth. The reinforced concrete bridge girder, attached to the massive end wall as shown in Figure P12.59, may be treated as a fixed-end beam of varying depth. (a) Construct the influence lines for the reactions R_A and M_A at support A. Evaluate the ordinates at 15-ft intervals. (b) Evaluate the moment M_A and the vertical reaction R_A at end A produced by the loaded ore-carrier when its 30-kip rear wheel is positioned at point B. E = 3000 kips/in.²

Figure P12.59: