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近年来,各种桥型的钢管混凝土拱桥在我国的应用发展很快,其中出现一种新型桥梁结构一钢管与钢管混凝土复合拱桥。该桥型设计中仅在拱肋的拱脚段充填混凝土,其余部分仍为空钢管,使拱肋的自重小、重心低,并具有较好的横向稳定及抗震性能。但由于该结构较为复杂,给模型制作带来困难。采用通过实验验证、能够反映结构实际受力情况的专用有限元计算程序分析该桥型的实际桥梁,是分析其拱肋结构的一种有效手段。
In recent years, a variety of bridge-type CFST arch bridge in China’s rapid development, including a new type of bridge structure of a steel pipe and concrete filled steel composite arch bridge. In the bridge design, the concrete is only filled in the arch section of the arch rib, while the rest is still empty steel pipe, so that the arch rib has low self-weight and low center of gravity, and has good lateral stability and seismic performance. However, due to the complexity of the structure, it brings difficulties to the model making. It is an effective method to analyze the arch rib structure by using the special finite element program which can be verified by experiment and can reflect the actual stress of the structure.