A grillage analysis for a single span bridge comprising 6 main skewed beams supported on pinned or rotational springs using a stiffness matrix (short and long term) based on 3 degrees of freedom at each joint – vertical deflection and 2 rotations. Loading is by joint forces or moments in 2 directions. Optional support conditions allow integral bridge decks and ‘ladder’ type bridges (2 main beams) to be analysed. A separate differential settlement analysis is included for integral bridges. The global axis may be rotated to facilitate the input of rotational springs parallel and at right angles to the abutment.

Contents (49 pages)

• General arrangement allowing definition of geometry
• input data for beam and support properties
• loading input and results summary for key shear, moment and displacement results
• matrix parameters and full set of results
• differential settlement analysis.
• validation using structural analysis software