关键词: 连续刚构桥, 高墩大跨, 施工阶段, 稳定性, 参数分析

Abstract: On the basis of a continuous rigid frame bridge，the numerical model was established with the finite element software ANSYS，and the degree of the influence of initial imperfections，load factors and structural design parameters on the stability of the continuous rigid frame bridge with long span and high piers in construction stage in mountainous area was discussed． Disciplines and causes of different parameters affecting the stability of the continuous rigid frame bridge with long span and high piers in construction stage were also discussed． The results show that initial geometrical imperfections，initial material imperfections，wind load，temperature load，unbalanced construction load and strength of materials impose great influence on the stability of the structure in construction; some proper measures should be taken to assure the stability and safety of the structure in construction stage．

Key words: continuous rigid frame bridge, long span and high piers, construction stage, stability, parameter analysis