波形钢腹板在矮塔斜拉桥中的应用和发展

Application and Development of Corrugated Steel Webs in Low-Tower Cable-Stayed Bridge

波形钢腹板矮塔斜拉桥是一种新型的钢混组合梁结构形式,这种结构形式使箱梁自重得到大幅度减轻,实现桥梁结构轻型化、适用跨径扩大化、地震反应减小化。同时,波形钢腹板具有足够大的横向刚度,无需采用腹板加劲肋保证其稳定,较平钢腹板节约钢材;更重要的是,波形钢腹板克服了平钢腹板吸收大量纵向预应力的缺点,有效地提高了预应力效率,能够有效地缩短建设工期、降低成本、节约能源。近年来,这种结构形式在国内外得到了快速发展,文中介绍了国内外有代表性的6座同类桥梁,分别阐述其特点及创新,最后指出波形钢腹板矮塔斜拉桥需要进一步研究的方向。

Corrugated steel web low-stayed cable-stayed bridge is a new type of steel-concrete composite beam structure,which greatly reduces the weight of the box girder,realizes the lightening of the bridge structure,the expansion of the applicable span,and the seismic response Reduce.At the same time,corrugated steel webs have sufficient lateral stiffness,without the use of web stiffeners to ensure its stability,saving steel compared to flat steel webs;more importantly,corrugated steel webs overcome the large amount of longitudinal pre-absorption of flat steel webs The shortcomings of stress effectively improve the prestress efficiency,and can effectively shorten the construction period,reduce costs,and save energy.In recent years,this type of structure has developed rapidly at home and abroad.This article introduces six representative bridges of the same type at home and abroad,and describes their characteristics and innovations.Finally,it is pointed out that the corrugated steel web low-stay cable-stayed bridge needs further research Direction.