Abstract: The box girder bridge is a spatial structure resisting a combination of tension，compression，bending，shear，and torsion forces，whose deformation and stress are very complex，especially in the long-span PC continuous rigid frame bridges. The authors have achieved the spatial simulation analysis of the construction of the Baiguodu Jialing River Bridge，which is located at Hechuan in Chongqing.Under the secondary development in ANSYS program.It's very useful in further understanding the similar bridge's actual stress distribution.

Key words: PC continuous rigid fmme bridge, simulation analysis of construction, spatial stress analysis

摘要： 箱梁桥是一个空间的结构受力体系，因承受拉、压、弯、剪和扭等的复合作用，其结构变形和受力情况十分复 杂，在大跨P．C．连续刚构桥中表现得尤为显著．通过对ANSYS程序进行二次开发，实现了重庆合川白果渡嘉陵江大 桥主桥施工全过程的空间仿真分析，这对深人认识该类桥的实际受力情况意义重大．

关键词: 预应力连续刚构桥, 施工仿真, 空间应力分析