渔洞水库北干渠葡萄井肋拱渡槽结构计算研讨

Study on the Structure Calculation of Putaojing Ribbed Arch Flume in the North Trunk Canal of Yudong Reservoir

采用大跨度的肋拱支承渡槽，肋拱型式和结构尺寸对肋拱纵向、横向稳定影响很大，采用悬链线拱时，截面优选变截面肋拱，变截面肋拱较能适应内力和应力变化。

The type and dimension of ribbed arch have great influence on its longitudinal and transversal stability when the ribbed arch has long span and is used to support a flume. The catenary arch can optimize the ribbed arch by means of varying cross sections to fit the changes of internal forces and stresses.