华中科技大学学报：自然科学版2012，Vol.40Issue(7)：110-114,5.
临时墩对三塔斜拉桥最大双悬臂抖振控制研究
Effects of temporary piers on buffeting control of longest double- cantilever＇s construction state in triple-tower cable-stayed bridge
摘要
Abstract
Based on the numerical analysis and wind tunnel tests on the buffeting performance of the longest double-cantilever construction state of a triple-tower cable-stayed bridge, it was found that the results obtained via the two methods coincide well, which verified the accuracy of the numerical meth- od. Moreover, considerable vertical buffeting response occurred, so for the buffeting control of the bridge, a temporary pier was employed. The buffeting performances of the structures with different layouts of the temporary pier were compared with each other as well to those of the structure without a temporary pier. The results show that the existence of the temporary pier decreases the amplitudes of vertical displacement distinctly, and the torsional displacement also shows some decrement while the lateral displacement increases to some extent. With the change of the layout of the temporary pier, the vertical and lateral displacements vary a little. Although the variation of the tortional dis- placement reaches 27 %, the mean value of tortional displacement is small. So the buffeting responses are generally not sensitive to the layout of the temporary pier. When the temporary pier is enough far away from the tower, the layout of the temporary pier can consider non-wind-resistant factors such as the topography of riverbed and so on.关键词
三塔斜拉桥/最大双悬臂状态/临时墩/抖振分析/风洞试验/气弹模型Key words
triple-tower cable-stayed bridge/longest double-cantilever construction state/temporarypier/buffeting analysis/wind tunnel tests/aeroelastie model分类
交通运输引用本文复制引用
马婷婷,葛耀君,杨泳昕,郭增伟..临时墩对三塔斜拉桥最大双悬臂抖振控制研究[J].华中科技大学学报：自然科学版,2012,40(7):110-114,5.基金项目
国家自然科学基金资助项目（51078276）. （）
