A grillage analysis for a bridge abutment supported on fixed or rotational springs using a stiffness matrix based on 3 degrees of freedom at each joint – vertical deflection and 2 rotations. Loading is by joint forces or moments in 2 directions. Rotational restraints can be modelled for wing walls and bridge deck supports where applicable. Model facilitates the analysis of earth pressures and vehicle surcharge loading.

Contents (25 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.