摘要
大跨度桥梁梁端转角通常较大,对列车通过的安全性和舒适性有较大影响,应尽可能加以控制。对影响铜陵公铁两用斜拉桥梁端转角的各因素进行了对比分析,分析表明跨度布置尤其是锚跨跨度对梁端总体竖向转角影响最大。对不同的主梁梁端构造进行了研究,最终采用设置纵向加劲隔板的钢箱桥面结构形式,可有效减小梁端局部竖向转角。
The large span bridges usually have bigger vertical rotation angle at the beam end.The an-gel could affect the traffic safety and comfortability,so it should be minimized.The factors influen-cing the vertical rotation angle are analyzed for the Tongling rail-cum-road cable-stayed bridge;the re-sults show that the span arrangement especially the anchor span length is the most important factor. Different structure types of the railway deck were studied,and the box-shape deck structure with or-thotropic slab stiffened by longitudinal stiffener is adopted.Consequently the local vertical rotation angle caused by the deformation of the bridge deck could be controlled within an acceptable range.
出处
《交通科技》
2014年第3期4-7,共4页
Transportation Science & Technology
关键词
公铁两用桥
斜拉桥
梁端竖向转角
控制措施
rail-cum-road bridge
cable-stayed bridge
vertical rotation angel at beam end
controlling method