Mission Bridge Rehabilitation and Seismic Retrofit

Mission, BC, Canada

This 1126 m-long, high-level crossing of the Fraser River features a main crossing comprising a variable profile steel box girder with spans of 88 m, 134 m and 88 m. The V-shaped piers make this one of the Lower Mainland’s most attractive bridges. Klohn Crippen Berger (KCB) provided complete engineering services for preliminary investigations, detailed design, construction inspection and contract administration.

KCB teamed with Brybil Projects to design the comprehensive rehabilitation and seismic retrofit.  KCB conducted 3D site response analysis, liquefaction assessment, and ground displacement analysis. Evaluation of various ground improvement techniques was conducted, and vibrocompaction liquefaction mitigation was designed.

A comprehensive condition assessment of the concrete girder approaches was performed, and concrete rehabilitation measures were designed. A seismic assessment of the concrete approach piers was undertaken using non-linear pushover analyses. Retrofit strengthening measures were designed for the piers including concrete underlays for the capbeams, fibre-wrap strengthening for the columns and pilecap footing overlays.


  • Haunched steel box girder design
  • Seismic analysis and retrofit design
  • Ground displacement analysis
  • Liquefaction mitigation design
Mission Bridge 4 years ago
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