梁格法在连续箱梁中的应用

Application of Grid Process in Continuous Box Girder

弯箱梁桥受力复杂,存在"弯一扭"耦合作用,而梁格法是一种准确、简便的弯箱梁计算分析方法。该文通过比较梁格法与单梁法计算的变截面箱梁各腹板的应力,说明箱梁宽度变化越大,边腹板和中腹板的受力越不均匀;当结构受力比较复杂时,梁格法计算的横梁受力更安全。

The stress of curved box girder bridge is complex with the 'bend-torque' coupling action.The grid process is a correct and simple calculation analysis method of bend box girder.The article compares the stresses of the webs of the non-uniform box girders calculated by the girder process and single-beam process,and explains that the larger is the width variation of box girder,the more non-uniform is the stress of the side web and the middle web.When the structure stress is more complex,the cross-girder stress is safer calculated by the girder process.