Calgary, AB, Canada, 2009
» Erection Engineering
The length of each arch span is 60m and the total length of the pedestrian crossing is 120m. The bridge has twin parabolic tapering steel box arches. The arch support hangers that carry a fishbone frame composed of floor beams and a central spine. A cast in place deck is laid over precast deck panels. The project involves the construction engineering of the steel arch, deck panels including temporary works. An erection scheme was developed that utilised one temporary tower for both the arches. Major constraints during construction included the stability of the central pier, available roadway closure, residual stresses from fabrication misalignment and increase precast deck loading.
A 3D FEM construction staging model was required to prove the stability of the slender arch components under the combined effects of significant unbalanced dead loads and construction wind.
