SEISMIC DESIGN OF BRIDGES - DESIGN EXAMPLE NO. 5: NINE-SPAN VIADUCT STEEL GIRDER BRIDGE

This document describes one of seven seismic design examples that illustrate "how" to apply the American Association of State Highway and Transportation Officials' (AASHTO's) seismic analysis and design requirements on actual different bridge types across the United States. Each provides a complete set of "designer's notes" covering the seismic analysis, design, and details for that particular bridge, including flow charts, references to applicable AASHTO requirements, and thorough commentary that explains each step. In addition, each example highlights separate issues (skew effects, wall piers, elastomeric bearings, pile foundations, etc.). This document describes the fifth example, a 1488 ft (454 m) steel plate girder bridge in the inland Pacific Northwest with pile foundations, SPC-B & A = 0.15g. It has nine spans and consists of two units: a four-span tangent (Unit 1) and a five-span with a 1300-ft (396-m) radius curve (Unit 2).