Helix Pedestrian Bridge International Stainless （国际不锈钢螺旋人行天桥）.pdfVIP

Structural Stainless Steel Case Study 11 Helix Pedestrian Bridge The Helix Bridge is a landmark pedestrian bridge in Singapore, comprising a walkway surrounded by opposing double helix structures made from stainless steel. The design was inspired by the geometric helicoidal arrangement of DNA, which is seen as a symbol of continuity and renewal. The 280 m long bridge is the first double-helix bridge in the world and forms part of a 3.5 km continuous waterfront promenade, linking the Marina Centre, the waterfront area and a large casino/hotel resort. It is a very lightweight structure built almost entirely using duplex stainless steel. Material Selection Figure 1: General view of the Helix Bridge Singapore has a dense urban environment with local planners placing a noticeable emphasis on quality urban design. Designers are encouraged to use sustainable, low maintenance and aesthetically pleasing materials. This can be challenging as the environment is hot, humid, industrial and coastal which can place significant demands on materials for both structural and architectural applications. Stainless steels give designers a good option to meet these demands as they are corrosion resistant materials and, provided the choice of Figure 2: Pedestrian view through the bridge of the grade is appropriate for the application, are a durable low maintenance duplex stainless steel members solution. The vast majority of the material used for the bridge, including the helices and support structures, was duplex stainless steel grade 1.4462 (S31803). This grade provi