水利水电技术（中英文）2023，Vol.54Issue(8)：54-66,13.DOI:10.13928/j.cnki.wrahe.2023.08.005
暴雨洪涝灾害下漂浮物堵塞对施工栈桥稳定性影响分析
Effects of floating object-induced blockage on construction trestle bridge stability in rainstorms and floods
摘要
Abstract
[Objective]In rainstorms and floods,floodwater is laden with floating objects such as wood debris,grass,and trash,which tend to jam the Bailey truss of the superstructure of a construction trestle bridge.The blockage leads to higher water pres-sure and also an increased likelihood of bridge failure.[Methods]To understand the effects of floating object blockage on the stability of the construction trestle bridge,a case study is performed on a grand bridge across the Yellow River via the numerical simulation using ANSYS to characterize the bridge stability in cases with(1)no Bailey beam blockage,(2)one-span Bailey beam blockage,(3)two-span Bailey beam blockage and varying water flow velocities.[Results]With an increased water flow velocity,the extremums of the displacement along the flow direction and the Mises stress extremums of the bridge climb up corre-spondingly.The case with no Bailey beam blockage is associated with the least growth rates of the maximum displacement and Mises stress,while those with one-span and two-span blockage show similar result.[Conclusion]Therefore,it can be concluded that floating object-induced blockage and accelerated water flow have negative effects on the stability of the construction trestle bridge during rainstorms and floods.They can raise the displacement and stress of the bridge and lead to local bridge failure.The findings of this research provide references for protecting construction trestle bridges during rainstorm/flood-triggered disasters.关键词
暴雨/漂浮物/流水压力/黄河特大桥/施工栈桥/稳定性/降雨/流速Key words
heavy rain/floating object/the flow pressure/Yellow River Bridge/construction trestle/stability/rainfall/current velocity分类
水利科学引用本文复制引用
窦国涛,张安静,尹俊红,张明飞,于文杰,李梓源..暴雨洪涝灾害下漂浮物堵塞对施工栈桥稳定性影响分析[J].水利水电技术（中英文）,2023,54(8):54-66,13.基金项目
National Natural Science Foundation of China(41902266) （41902266）
Henan Province Science and Technology Project(222102320468) （222102320468）
Zhengzhou Institute of Aeronautics and Astronautics Innovation and Entrepreneurship Education Teaching Reform Research and Practice Project(zhjysc23-11)国家自然科学基金项目(41902266) （zhjysc23-11）
河南省科技攻关项目(222102320468) （222102320468）
郑州航院创新创业教育教学改革研究与实践项目(zhjysc23-11) （zhjysc23-11）
