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1 概述 近年来,连续梁结构体系已成为预应力混凝土桥梁的主要桥型之一。在大跨度桥梁结构中,与其它结构体系比较,常常成为最佳桥型方案。在国外,这种桥型的桥梁在整个预应力混凝土桥梁修建总数中,已从1948年的10％左右上升到目前的40～50％,可见它有强大的生命力。在我国,从70年代开始才采用这种桥型,起步虽较迟,但近年来开始迎头赶上。至今已建成的和正在修建的大跨度预应力混凝土连续梁桥达上百座,其跨度从开始的40～70m发展到180m。
1 Overview In recent years, continuous beam structural system has become one of the main bridge type of prestressed concrete bridges. In the long-span bridge structure, compared with other structural systems, often become the best bridge program. Abroad, the bridge of this type of bridge in the total construction of the entire prestressed concrete bridge has risen from about 10% in 1948 to the current 40 to 50%, showing that it has strong vitality. In our country, this type of bridge was used only from the 1970s. Although it started later, it started to catch up in recent years. Up to now, hundreds of large-span prestressed concrete continuous girders have been built and are under construction, with a span ranging from 40-70m at the beginning to 180m.