利用结构稳定性分析的计算模块，在南中环桥原设计的基础上改变各种设计参数，研究了该桥型稳定性的影响因素及其影响程度。
As with the use of stability analysis program , influencing factors of stability of butterfly-shape arch bridge and the influence degree are studied by the alteration of design parameters on the basis of original design of the bridge . 4 .
南原