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 RA and MA at support A. Evaluate the ordinates at 15-ft intervals. (b) Evaluate the moment MA and the vertical reaction RA 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
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