Based on finite element theory, the 3 dimensional dynamic evaluation model of long-span X-style steel box-section arch bridge was created with large-mass method (LMM) and fixed arch foot method.

• 摘要基于有限元理论，应用大质量法(LMM)和拱脚固定法建立大跨度钢箱提篮连拱桥的空间动力计算模型。