1引言桥梁既是建筑又是结构,作为建筑,须满足坚固、实用、经济和美观的要求,看作结构,要符合经济、安全和耐久性的原则,桥梁建筑与结构是相辅相成、不可分割的统一体。时至今日,新型桥梁特别是波纹钢腹板预应力混凝土组合曲线箱梁桥在国内外也已建成,如图1和表中所示,为社会的发展增添了新的活力。 1 Introduction A bridge is both a building and a structure. As a building, it must meet the requirements of sturdiness, practicality, economy and aesthetics. It should be regarded as a structure and in accordance with the principle of economy, safety and durability. The bridge structure and structure are mutually reinforcing and indivisible body. Today, new bridges, especially corrugated steel web prestressed concrete composite curved box girder bridges have also been built at home and abroad, as shown in Figure 1 and Table, adding new vitality to the development of society.