%0 Journal Article %T 交叉吊索对施工中悬索桥的静风稳定性影响<br>Influence of Crossed Hangers on Aerostatic Stability of Suspension Bridge during Constructing %A 李翠娟 %A 李永乐 %A 叶华文 %A 强士中< %A br> %A LI Cuijuan %A LI Yongle %A YE Huawen %A QIANG Shizhong %J 西南交通大学学报 %D 2017 %R 10.3969/j.issn.0258-2724.2017.04.002 %X 为探明超大跨悬索桥在施工过程中的静风稳定性，采用三维非线性分析方法，对主跨3 500 m的超大跨CFRP （carbon fibre reinforced plastic）主缆悬索桥进行了施工阶段的静风稳定性分析，研究了3种交叉吊索对施工阶段静风性能和变形形态的影响.研究结果表明：随着加劲梁吊装逐步完成，结构静风稳定性不断降低，加劲梁合龙但尚未刚接阶段的静风稳定性最差；仅安装水平交叉吊索作用不大，竖向交叉吊索和综合交叉吊索可显著提高施工阶段的静风稳定性；加劲梁吊装完成率位于9.8%~60.6%时，安装综合交叉吊索可取得较好的抗风效果，其余施工阶段可只安装竖向交叉吊索.<br>： In order to evaluate the aerostatic safety of super-large span suspension bridges, the 3D nonlinear finite element method was used to analyze the aerostatic stability of a super-large span suspension bridge with 3 500 m long main span and carbon fibre reinforced plastic (CFRP) cables, and the influence of three kinds of crossed hangers on the aerostatic performance and deformation shape of the suspension bridge during its construction were studied. The results show that as the stiffening girder is constructed step by step, the aerostatic stability becomes worse and worse, and finally reaches its minimum value when all of girder segments are erected but not rigidly connected. Only the horizontal crossed hanger has little effect on the aerostatic stability of suspension bridge during construction phase, but both the vertical crossed hanger and the composite crossed hanger made up of vertical and horizontal crossed hangers can improve the aerostatic stability significantly during construction. While the percentage of erected stiffening girders during construction is between 9.8% and 60.6%, the composite crossed hanger is more effective than other types of hangers in enhancing the aerostatic stability; however, using vertical crossed hangers alone is effective enough in other construction stages %K 桥梁工程 %K 施工阶段 %K 静风稳定性 %K 非线性 %K 交叉吊索 %K 超大跨悬索桥 %K CFRP主缆 %K < %K br> %K bridge engineering %K construction stages %K aerostatic stability %K nonlinear %K crossed hangers %K super-large span suspension bridge %K CFRP cables %U http://manu19.magtech.com.cn/Jweb_xnjd/CN/abstract/abstract12452.shtml