BPLRFD - BEARING PAD DESIGN AND ANALYSIS

Purpose:

To design or analyze elastomeric bearing pads in accordance with the AASHTO LRFD Bridge Design Specifications and the Pennsylvania Department of Transportation Design Manual Part 4 using US customary units.  Plain pads, plain pads with a hole, laminated pads, and laminated pads with a hole can be designed or analyzed for simple-span or continuous span structures.  Beam types considered are: Prestressed I‑Beams, Prestressed Box Beams, Prestressed Adjacent Box Beams, and Steel I‑Beams. The effects of skew angle, vertical load, horizontal longitudinal moment, and beam rotation due to live load are considered in the design procedure.

Input:

Expansion length, dead load and live load reactions, live load rotation, skew angle, shrinkage and creep movement, temperature range, hardness and pad dimensions.

Output:

Pad length, pad width, number of layers and thicknesses, number of shims and thicknesses, specification check for geometry, dead load stress, live load stress, anchorage, shim stresses, rotations, pad stability and deflection.