基于剪力–柔性梁格法的大箱梁加宽旧T形梁桥荷载横向分布研究  

Study on Load Transverse Distribution of Old T Girder Bridge Widened by Large Box Girder Based on Shear Flexible Beam Grillage Method

作　　者：谢柱坚 张力文[1] 孙卓[1] 金腾飞 Xie Zhu-jian;Zhang Li-wen;Sun Zhuo;Jin Teng-fei

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《建筑技术开发》2019年第2期10-11,共2页Building Technology Development

基　　金：国家青年科学基金项目(51608137)

摘　　要：针对大箱梁的腹板间距较大的特点,提出基于剪力–柔性梁格法的大箱梁加宽旧T形梁桥的有限元模拟方法。以某工程实例为背景分析大箱梁加宽旧T形梁桥拓宽前后荷载横向分布特性和大箱梁的两腹板荷载横向分布系数的差异性。研究结果表明:对大箱梁的两侧腹板需考虑荷载横向分布问题,应将大箱梁等效为梁格计算;增设大箱梁能够大幅度提高通行能力,也能有效减少旧T形梁桥所承受的汽车荷载。In view of the large web spacing of large box girder,a finite element simulation method for widening old T-beam bridge with large box girder based on shear-flexible grillage method is proposed.Taking an engineering example as the background,the load transverse distribution characteristics before and after widening of the old T-beam bridge with large box girder and the difference of load transverse distribution coefficients between the two webs of the large box girder are analyzed.The results show that the lateral load distribution should be considered in the web of the large box girder,and the large box girder should be equivalent to the girder grid calculation.

关 键 词：剪力-柔性梁格法 横向分布 大箱梁 T形梁桥 

分 类 号：U441[建筑科学—桥梁与隧道工程]