铰拱的合理拱轴线 (reasonable axis of arch) 只限于三铰平拱受 竖向荷载作用 在竖向荷载作用下,三 铰拱的合理拱轴线的纵 坐标与相应简支梁弯矩 图的竖标成正比.
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The common used arch axes are circular arcru parabola arch, catenary arch.
空腹式刚架拱桥的拱轴线一般可取圆弧线、抛物线或悬链线。
参考来源 - 空腹式刚架拱桥受力特性分析The axial cord of arch optimized approaches pressure line, the biggest value off axial cord of arch is lower 41.2 percent than before.
经分析比较，优化后的拱轴线受力比较均匀且与压力线偏离不大，其最大偏离量与优化前的最大偏离量相比减小了41.2％。
参考来源 - 钢管混凝土拱桥拱肋线形的设计优化·2,447,543篇论文数据，部分数据来源于NoteExpress
通过测量拱腹各点坐标来确定双曲拱桥每孔的拱轴线。
According to measuring the coordinates of each span of long span double arched bridge, the arch axis for every span is determined.
对桥梁进行了外观检测，将拱轴线型、桥面线型与设计进行了比较，发现拱轴略向南偏移；
From the tests of the bridge appearance and comparison with the original design, the offset of the arch is found from south to north.
异型系杆拱桥是我国学者提出的一种新型桥梁结构体系，其吊杆全部按一定斜率斜向布置，形成偏态的拱轴线。
The special-shaped tied-arch bridge becomes a popular bridge type with the priority to be selected owing to its novel and aesthetic appearance.
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