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安纳西斯桥(Annacis)位于弗雷塞河(Fraser)南支流河口上游约19公里处,于1986年建成后将成为世界上跨度最大的斜拉桥。 本文介绍该桥上部结构的设计与施工。着重介绍比较方案的制订和评价,关于交通、环境、船舶撞击和其它方面的设计要求,以及从仅满足承受重力荷载的基本要求到能满足空气动、地震和疲劳等多种要求的结构设计过程。还介绍了由承包单位选择的上部结构安装方案,报导了目前的施工进程。
The Annacis, located about 19 kilometers upstream of the southern tributary of the Fraser, will be the largest span cable-stayed bridge in the world when completed in 1986. This article describes the design and construction of the upper structure of the bridge. It focuses on the formulation and evaluation of comparative programs, design requirements on traffic, environment, ship impact and other aspects, as well as structural design processes that meet only the basic requirements of gravitational loading to meet various requirements of aerodynamics, earthquakes and fatigue . The Superstructure Installation Program, selected by the contractor, was also presented, reporting on the current construction progress.