对于矢跨比较小的坦拱，矢高与截面回转半径的比值将决定拱的屈曲形式。
Secondary buckling mode of shallow arches depended on the ratio of rise to gyration radius.
大连市泉水居住区四号路跨东北路桥主桥是跨度为88米，矢跨比1／12的箱形截面预应力钢筋混凝土双铰坦拱。
The main bridge of Dalian Quanshui No. 4 Bridge is a box-section prestressed steel concrete two-hinged flat arch bridge with 88m span and 1/12 rise-to-span ratio.
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