漫水箱梁桥水力荷载及其影响

Hydraulic Load and Its Influence on Submersible Bridge with Box Section

讨论了箱形截面漫水桥设计中应考虑的水力荷载 ,包括浮力、等效静水力和由箱内外水头差引起的动态浮力等 .给出了底板开孔的漫水箱梁桥各种水力荷载的计算方法 ,以及相应的荷载组合方法 .最后 ,以某 5跨连续箱形截面漫水桥为例 ,计算了各项水力荷载 ,分析了水力荷载对箱梁的影响 。

The hydraulic loads,which should be considered in design process,are discussed,including rising force,equivalent static hydraulic load,and dynamic rising force due to difference of water header between inner and outer of box section.The method to calculate those hydrodynamic loads of box section-bridge with holes on its bottom slab is given.The load combination method is also introduced.In the end,a five span submersible continuous bridge is taken as an example,and hydrodynamic loads and structure response when the bridge is submerged are showed.