中文摘要：

梁端竖向折角是桥梁设计的控制性因素,合理确定其限值标准对结构安全和车辆走行性非常重要。本文介绍德、日、中三国铁路桥梁规范梁端竖向折角限值的相关规定,分析三国规范相关标准的取值依据,对比相同荷载条件下三国规范取值的差异,提出中国现有规范有待完善,讨论大跨度桥梁梁端竖向折角的特殊性。研究结果对轨道交通桥梁设计具有一定参考价值。

英文摘要：

The issue of vertical rotation angles at beam ends is the control factor in bridge design,so rational determination of their limit value standard is critical to structural safety and vehicle running performance. In this paper, the limit value standards of vertical rotation angles at beam ends specified in the relevant codes of Germany,Japan and China were introduced. The basis to set the limit value standards in the three national codes was explored respectively and their differences were compared on condition of the same live load. It was pointed out that the provisions of the existing China code needed to be further improved. The speciality of the vertical rotation angles at beam ends of large-span bridges were discussed. The research results have guiding significance for design of rail bridges.