水利学报2024，Vol.55Issue(6)：711-722,12.DOI:10.13243/j.cnki.slxb.20230812
新型阻尼耗能式泥石流格栅坝的工作机制及理论计算方法
Working mechanism and theoretical calculation method of novel damping energy dissipation debris flow grille dam
摘要
Abstract
In order to solve the problem that the traditional grille dam is easy to be damaged by the impact of debris flow,a novel Damping Energy Dissipation Debris Flow Grille Dam(DEDDFGD)is proposed,and its structural composition and working principle are interpreted.Based on the force method,deformation compatibility equation and Winkler elastic foundation beam theory,the mechanical calculation model of each component in the energy dis-sipation and reset stage of the novel structure is established,and the calculation method of the buried depth of the column is given.The mechanical properties of the novel structure were analyzed by finite element software,and the theoretical and simulated values were compared.The results show that:(1)The novel DEDDFGD is proposed on the basis of flexible energy dissipation concept,which consumes the impact energy of debris flow through the up-stream grille and the damping energy dissipation brace.Compared with the traditional debris flow grille dam,the impact resistance power is greatly improved.(2)The force of novel DEDDFGD is divided into two stages:energy dissipation and reset.The deformation coordination in the energy dissipation stage makes the internal force of the beam between the side column and the middle column change sharply at the end of the sliding bearing,which should be considered in the design.In the reset stage,the internal force of the top vertical bar and the cross beam is greater than that of other layers,which should be checked emphatically.(3)The theoretical calculation is basi-cally consistent with the internal force change trend of each component of the simulation,which verifies the reliabil-ity of the calculation method in this paper.The results can provide a theoretical basis for the application of the novel DEDDFGD.关键词
泥石流/新型阻尼耗能式泥石流格栅坝/工作机制/内力计算/协同受力Key words
debris flow/novel DEDDFGD/working mechanism/internal force calculation/cooperative bearing分类
天文与地球科学引用本文复制引用
王永胜,郭文祥,张晓研,潘远文,王彦兵..新型阻尼耗能式泥石流格栅坝的工作机制及理论计算方法[J].水利学报,2024,55(6):711-722,12.基金项目
国家自然科学基金项目(52269024,51768039) （52269024,51768039）
兰州理工大学红柳杰出青年人才支持计划项目(04-062408) （04-062408）
兰州市青年科技人才创新项目(2023-QN-53) （2023-QN-53）
甘肃省高等学校产业支撑计划项目(2020C-40) （2020C-40）
