按照苏通长江大桥实际的施工过程及其施工荷载分布，考虑施工过程的影响，建立全桥空间组合结构计算模型，用有限元法研究了主桥斜拉桥自索塔施工开始直到全桥合龙的各施工阶段的结构稳定安全系数及其失稳模态，对主桥钢箱梁架设施工过程中的结构稳定行为给出了综合评价。

According to construction and load action on SuTong Yangtze River Highway Bridge, an analysis model for structural stability was studied and solved through FEM. Stability safety factor and mode were obtained, and some problems on stability for the installation of steel box girders were also discussed.