偏心支承对45度圆心角双跨弯箱梁桥的影响

Influence of Eccentric Support on two-span Curved Box-girder Bridges with 45-degree central angle

通过对72个圆心角为45度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,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。

In this paper 72 two-span curved box-girder bridge modes with 45-degree central angle and eccentric support were made, software system 3D-BSA was used to compute, and statistic analysis method to set up empirical formulas between structure responses and parameters, such as bridge span and eccentricity of support for this type of bridges under service capacity state and carrying capacity state, so as to make some suggests or basis for practical design.