通过对72个圆心角为90°的双跨偏心支承弯箱梁桥模型的计算分析,以梁格系法为基础编制的3D- BSA软件系统为结构计算工具,以Excel2 0 0 0为数据处理工具,用统计分析的方法建立双跨偏心支承弯箱梁桥结构反应在使用极限状态及承载能力极限状态下与桥梁跨长、支承偏心距等参数间的经验公式,为双跨偏心弯箱梁桥的实用设计提出适当建议或借鉴依据。 Through the calculation and analysis of 72 double-span eccentrically braced box girder bridges with central angles of 90 °, the 3D-BSA software system based on the girder system is a structural calculation tool, with Excel 2000 as the data processing Tools, the statistical analysis method is used to establish the empirical formula between the structural responses of the double-span eccentric bending curved box-girder bridge and the bridge span length and bearing eccentricity under the limit state and ultimate bearing capacity, Practical design of the bridge make appropriate recommendations or reference.