铁道科学与工程学报2016，Vol.13Issue(12)：2441-2446,6.
实现整孔架设的48m UHPC简支箱梁设计
The i mple mentation of design for integrally erected 48 m UHPC si mple-supported box girder
摘要
Abstract
A novel integrally prefabricated and erected 48 m ultra-high-performance concrete (UHPC)simple-supported box girder bridge with dense diaphragm plate was proposed.By combining UHPC,thin-walled box gird-er with dense diaphragm plates and external prestressing into the novel box-girder scheme,not only can the span length of prefabricated and erected simple-supported box girder bridges be improved,but also the ever existing problems in long-span simple-supported PC bridges,such as the cracking in concrete girders and the excessive residual creep deflection at midspan,may be eliminated.A trial-design and analysis for a simple-supported box girder bridge built from UHPC with span length of 48 m is presented,and the results show that the thicknesses of its components can be decreased greatly,the self-weight of superstructure may be equivalent to that of a 32 m PC simple-supported box girder,a good economy may be achieved.And all of the main calculation results comfort code requirements.Besides,the transverse stress,the torsional deformation and the cross section deformation de-creased effectively by using the dense diaphragm plates.关键词
超高性能混凝土/48 m简支箱梁/整孔预制架设/密集横隔板/设计Key words
ultra-high-performance concrete/48 m simple-supported box girder/integrally prefabricated and e-rected/dense diaphragm plates/design分类
交通工程引用本文复制引用
胡云耀,白玉堂,张阳..实现整孔架设的48m UHPC简支箱梁设计[J].铁道科学与工程学报,2016,13(12):2441-2446,6.基金项目
国家自然科学基金资助项目 （）
