上海长江大桥60m跨预制拼装主梁设计

根据堡镇沙浅水区河床特征,确定上海长江大桥中60 m跨连续梁采用预制节段悬臂拼装法施工.介绍该连续梁的结构布置及主要构造、预应力体系、结构计算分析和主要施工方法等,并对短线法预制曲线梁的尺寸修正、节段预制精度和节段拼装精度的控制、体外预应力计算方法的简化处理、体外预应力损失的计算以及体外束的耐久性设计等关键技术进行详细的说明.

Design of 60-m Span Precast and Assembled Main Girders of Shanghai Changjiang River Bridge

In accordance with the characteristics of the riverbed in the shallow water area on Baozhensha side,the 60-m span continuous girders of Shanghai Changjiang River Bridge over the shallow water area were determined to be constructed by the precast segmental cantilever assembling method.This paper presents the structural layout,principal structure,prestressing system,structural calculation and analysis and the principal construction method of the girders and illustrates in detail the key techniques,including t...