A butterfly-shape arch bridge in Zhongshan City is a multi-element spatial structure composed of inclined steel arch ribs, curved steel box girder and inclined suspenders, and the structural behavior of the bridge is particularly complicated.

• 摘要中山市蝴蝶拱桥是由倾斜钢拱肋、曲线钢箱梁和倾斜吊杆组成的多元空间结构，受力行为复杂。