扣索与拱肋夹角对钢管拱拱圈应力及线型影响分析

Analysis of the Influence of the Angle Between Buckle Cable and Arch Rib on the Stress and Line Shape of Steel Pipe Arch Ring

以某山区高速公路上承式钢管混凝土拱桥斜拉扣挂法悬臂拼装拱圈为例,通过对比分析扣索与拱肋的不同夹角对拱圈应力、拱圈合龙线型的影响,总结由此产生的问题,提出扣索与拱肋夹角的经验取值范围,为同类型桥梁施工扣塔高度选择提供借鉴案例。

Taking the cantilever assembly arch ring of a mountain expressway through concrete-filled steel tubular arch bridge with cable-stayed buckle method as an example,this paper compares and analyzes the influence of different angles between buckle cable and arch rib on arch ring stress and arch ring closure line,and summarizes the resulting problems.The empirical value range of the angle between buckle cable and arch rib is put forward,which provides a reference case for the selection of buckle tower height in the construction of the same type of bridge.