人民长江2025，Vol.56Issue(3)：158-163,171,7.DOI:10.16232/j.cnki.1001-4179.2025.03.021
按二维问题研究平面闸门门槽受剪破坏的合理性
Rationality of study on shearing failure of plane gate slot as a two-dimensional problem
摘要
Abstract
The plane gate slot is a three-dimensional space structure.However,the existing researches and relevant specifica-tions regard its shearing as a two-dimensional problem for structural design,and the rationality is controversial.In order to verify the rationality of considering the shearing failure of the gate slot as a two-dimensional problem,a three-dimensional linear elas-tic analysis was carried out on the prototype of an emergency gate slot in a practical project.The deformation,shear stress distribu-tion and shear force distribution of each section under the action of gate thrust were discussed,and influences of the outer side constraint of the pier on the shear of the gate slot were discussed,so that the most dangerous section of sheared gate slot was deter-mined.The two-dimensional and three-dimensional nonlinear analysis of the gate slot was carried out to compare the failure mode of the most dangerous section with the plane specimen.The results showed that under the action of gate thrust,the deforma-tion and shear stress of gate slot changed with elevation,and whether or not the outside of gate pier was constrained has no obvious influence on the distribution law of the gate slot shear stress.The position of the most dangerous section of the sheared gate slot was independent of the constraint condition of the outer side of the pier.When the gate thrust was simplified to uniform distribu-tion,the most dangerous section was located at the half height of the pier.The failure modes of the most dangerous sheared section obtained by the two-dimensional and three-dimensional nonlinear analysis were nearly the same,and the results were consistent with the plane specimen test results.Therefore,it is reasonable and feasible to analyze the shearing capacity of gate slots as a two-dimensional problem,which can reflect the characteristics of the shear failure of gate slots.关键词
平面闸门门槽/受剪承载力/破坏形态/三维空间结构/二维分析Key words
plane gate slot/shearing capacity/failure mode/three-dimensional spatial structure/two-dimensional analysis分类
建筑与水利引用本文复制引用
冷飞,蒋勇,喻君,漆天奇,陈思远..按二维问题研究平面闸门门槽受剪破坏的合理性[J].人民长江,2025,56(3):158-163,171,7.基金项目
国家自然科学基金项目(52278400) （52278400）
