Willingdon Avenue Overpass Seismic Retrofit

The City of Burnaby retained Associated Engineering to complete a seismic evaluation and design of seismic upgrades.The assessment of the bridge identified several seismic vulnerabilities, including insufficient abutment wall strength, inadequate girder seat lengths and shear keys at girder ends, and deficient connections between the precast columns and girders. The seismic retrofit scheme consisted of soil anchors at both abutments to stabilize the abutment retaining walls; concrete shear blocks at the north abutment to prevent transverse sliding of the abutment; shear keys between the precast girders at each abutment; and column restrainers at each girder–column connection.

Following design, Associated Engineering provided contract administration and construction inspection services for the $0.5 million seismic retrofit construction contract.