Bridge design to Eurocodes : worked examples

This document is a Technical Report with worked examples for a bridge structure designed following the Eurocodes. It summarizes important points of the Eurocodes for the design of concrete, steel and composite road bridges, including foundations and seismic design, utilizing a common bridge project as a basis. The geometry and materials of the example bridge as well as the main assumptions and the detailed structural calculations are presented in the first chapter of the report. Each of the subsequent chapters presents the main principles and rules of a specific Eurocode and their application on the example bridge, namely: •The key concepts of basis of design, i.e. design situations, limit states, the single source principle and the combinations of actions (EN 19990); •Permanent, wind, thermal, traffic and fatigue actions on the bridge deck and piers and their combinations (EN 1991); •Bridge deck modeling and structural analysis; •The design of the bridge deck and the piers for the ULS and the SLS, including the second order effects (EN 1992-2); •The classification of the composite cross-sections, the ULS, SLS and fatigue verifications and the detailed design for creep and shrinkage (EN 1994-2); •The settlement and resistance calculations for the pier, three design approaches for the abutment and the verification of the foundation for the seismic design situation (EN 1997); •The conceptual design for earthquake resistance considering the alternative solutions of slender or squat piers; the latter case involves seismic isolation and design for ductile behavior (EN 1998-1, EN 1998-2). The bridge worked example analyzed in this report was prepared and presented at the workshop "Bridge Design to the Eurocodes" that was held on 4-6 October 2010 in Vienna, Austria. The workshop was organized by JRC with the support of DG ENTR and in collaboration with CEN/TC250/Horizontal Group Bridges, the Austrian Federal Ministry for Transport, Innovation and Technology and the Austrian Standards Institute. The document is part of the Report Series "Support to the implementation, harmonization and further development of the Eurocodes", prepared by JRC in collaboration with DG ENTR and CEN/TC250 "Structural Eurocodes".