Challenges of an Iconic Pedestrian Bridge

Abstract

<p>This paper discusses the challenges involved in the structural design of an iconic pedestrian bridge. The pedestrian bridge is approximately 60 m in span and the cross-section is open elliptical- shaped, formed by spiralling pipes. In the preliminary design stage, different configurations of structural systems are studied to enhance the overall stiffness and strength requirements of the bridge, in close collaboration with architects. Finally, combination of steel double helical ring with steel girders is used as a structural system. Inner helical ring is used as primary structural ring while the outer helical ring is used as secondary ring to support the cladding. A 4 mm-thick aluminium metal skin is used for cladding of the bridge which contributes significant portion of the gravity load and mass for seismic effects in design. The bridge is designed for code-specified gravity, wind and seismic loadings.</p>