并排大悬臂变截面箱梁支承桥面系的空间分析与试验研究

The Space Analysis and Experimental Research of Bridge Deck Supported By Paralleling Great Cantilevers With Variable Box Section

通过对长沙洪山特大桥的塔墩梁固结节段的模型试验 ,应用有限元程序计算分析了各横梁的应力、弯矩、挠度、扭转角变化规律 ,对集中荷载、分布荷载作用下横梁间距、桥面板厚度、悬臂长度、平均高跨比的变化对弯矩分配的影响进行了探讨 .

Based on the model test of Hongshan Bridge in Changsha,the paper analyses the regularity of stress,bending moment,deflection and angle of twist of floorbeams,and also discusses the influence on the distribution of bending moment by the variation of distance between floorbeams,thickness of deck,span of floorbeams and the ratio of average height to span when the deck is loaded with a concentrated or distributed force.