曲线组合梁负弯矩区裂缝控制措施研究

Research on Control Measures for Cracks in Hogging Moment Area of Curved Composite Beam

简要说明了组合箱梁桥的概念及结构特点。针对连续组合梁的负弯矩区域桥面板裂缝控制问题进行研究,分析了常用的几种减少中支点负弯矩区桥面板裂缝措施的优缺点,对目前少有研究的曲线连续组合梁在支点强迫位移措施作用下的效应进行了大量的数值分析,总结出其受力特点及不同曲线半径可采用的强迫位移数值对比表,以供参考。

The concept and structural features of the composite beam bridge are described briefly.The research on control problems of cracks of bridge deck slab in the hogging moment area of continuous composite beam is made,and the merits and demerits of some commonly-used measures that reduce the central bearing point for cracks of bridge deck slab in the hogging moment area are analyzed.At present,a large amount of numerical analyses on the effect of the curved continuous composite beam under the influence of taking the measure for the forced displacement of bearing point are made,and the comparative table of numerical value of forced displacement that is adopted for its loading features and different curve radiuses is summarized,so as to provide reference.