波纹钢腹板组合箱梁桥力学性能研究现状及发展

THE STATUS QUO AND DEVELOPMENT OF RESEARCH FOR COMPOSITE BOX-GIRDER WITH CORRUGATED WEBS

波纹钢腹板组合箱梁桥以波纹钢代替普通混凝土作为腹板,可有效减轻桥梁自重,提高跨越能力,近几十年来得到广泛关注和深入研究。对国内外关于该组合结构的波纹钢腹板力学性能、整体静力学性能、动力学性能、疲劳性能及剪力连接件和转向块等方面的研究现状及成果进行总结、分析。指出:波纹钢腹板组合箱梁体外预应力筋的应力增量、组合箱梁几何参数对其力学性能影响的综合分析、剪力连接件几何参数对其力学性能的影响及剪力连接件在重复荷载下的力学行为规律等方面是需要进一步研究的课题。

In composite box-girder bridges,the dead load of bridge is reduced effectively,and the capacity of spanning is improved,for the material of webs are corrugated steel instead of traditional concrete.In recent dozens of years,these bridges have been concerned widely and researched deeply.In this paper,the research status quo and results were summarized and analyzed including mechanical performance of corrugated steel webs,static mechanical behavior of integration,dynamical mechanical performance,fatigue performance,shear connectors and turning blocks.It is pointed out that the stress increment of external pre-stressed tendons,the effect of geometric parameters for composite box-girder and shear connectors on their mechanical performance and the behavior of shear connectors under repeating loading are the subjectsneeding further research.