拱肋是拱桥主拱圈的骨架。拱肋在安砌拱波的过程中，它承受本身自重，横向联系构件，拱波及相应施工荷载。
The prestressed continuous beam-arch composite bridges are a special structural system where the horizontal thrust of the arch rib is absorbed by a prestressed tie at deck level.
预应力混凝土连续梁拱组合体系桥梁主要由拱肋、系梁、吊杆、横梁及桥面系组合起来共同承受荷载，是一种结构受力合理、外形美观、新颖的结构体系。
参考来源 - 三跨连续梁拱组合体系桥梁的分析及其试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
一个钢筋拱肋支撑的拱形大屋顶。
在合理内倾角度下，拱肋内倾可以有效地提高拱的横向稳定性。
With the reasonable included Angle, the inclination of ribs can improve the lateral stability of arch efficiently.
其最大特点是将空中焊接横联作业转化为地面作业，能确保施工安全和拱肋拼装质量。
Its most outstanding characteristic is to transform transverse bracing welding from air to ground, thus securing construction and ensuring assembly quality.
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