一种弯桥梯形压重的技术创新

Technical Innovation of a Trapezoidal Weighting of Curved Bridge

摘要:

小半径弯桥由于弯扭耦合作用，造成桥梁曲线内外侧支座受力不等，圆弧内侧支座甚至会出现负反力，进而造成桥梁有倾覆可能，因此改善结构的支座受力情况，提高桥梁的抗倾覆能力，是桥梁设计者必须关注的问题。以一个弯板桥为算例，分析各种压重方法的压重效率，进而推导出最优压重方法：梯形压重。并针对此梯形压重进行了技术总结，并用于具体工程设计，取得了良好的效果。今后，梯形压重的技术创新值得推广。

Abstract:

Due to the bending-torsional coupling action of small radius curved bridge, the internal and external bearing forces of the bridge curve are not equal, and the bearing inside the arc can even have the negative reaction, which may cause the bridge to overturn. Therefore, the bridge designers must pay attention to the problem of improving the bearing stress of the structure and improving the anti-overturning ability of the bridge. Taking a curved slab bridge as an example, the weighting efficiency of each weighting method is analyzed, and then the optimal weighting method of trapezoidal weighting is deduced. The technology of this trapezoidal weighting is summarized, and has been used in specific engineering design. Its good effect is achieved. In the future, the technological innovation of trapezoidal weighting is worth popularizing.