结构参数对三塔斜拉桥竖向刚度的影响分析  

Effect of Structure Parameter on Vertical Rigidity of Three-tower Cable-stayed Bridge

作　　者：王彬 WANG Bin(Shanxi Transportation Survey&Design Institute Co.,Ltd.,Taiyuan,Shanxi 030032,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,山西太原030032

出　　处：《山西交通科技》2020年第5期58-61,共4页Shanxi Science & Technology of Transportation

摘　　要：为解决三塔斜拉桥因整体竖向刚度低而限制其在实际工程中的应用问题,指导该类型桥梁设计,以临猗黄河大桥为研究对象,采用有限元法,分别研究了辅助墩位置、塔梁约束体系、斜拉索面积及边、中索塔刚度等结构参数对三塔斜拉桥整体竖向刚度的影响,研究结果表明:辅助墩距离过渡墩0.4L时,结构竖向刚度最大;漂浮与半漂浮体系对结构的刚度影响相当基本,塔梁全约束体系结构竖向刚度最大;斜拉索面积及边塔刚度对结构竖向刚度影响相对较小;中塔刚度对结构竖向刚度影响较大;中塔底部刚度较塔顶部的影响大。In order to eliminate the application restriction of three-tower cable-stayed bridge caused by low overall vertical rigidity on practical engineering, and guide the bridge design, this paper took Linyi Yellow River Bridge as the research objective, the finite element method was used to study the effect of structure parameters such as the position of the auxiliary pier, the restraint system of the tower beam, the area of the stay cable, the rigidity of the side and middle cable tower on the overall vertical rigidity of the three-tower cable-stayed bridge,respectively. The research results showed that, the vertical rigidity of the structure reached the maximum when the distance between the auxiliary pier and the transition pier was 0.4 L. The floating and semi-floating systems had similar effects on the rigidity of the structure, and the fully constraint system structure of the tower beam had the maximum vertical rigidity. For the vertical rigidity of the structure, the influences of the area of the stay cable and the rigidity of the side tower were relatively small, the influence of the rigidity of the middle tower was greater, and the influence of the rigidity of the bottom of the middle tower was greater than that of the top of the tower.

关 键 词：三塔斜拉桥 竖向刚度 结构参数 挠度 影响分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]