独塔斜拉桥水滴形钢结构主塔力学特性  

Mechanical Behavior of Water-drop-shaped Steel Tower of Cable-stayed Bridge

作　　者：周长青[1] 赵锐[1] 崔德永 梁斌[2] 聂宁波[1] 

机构地区：[1]中铁十五局集团有限公司一公司,陕西西安710018 [2]河南科技大学土木工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2015年第4期68-72,8,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省重点科技攻关基金项目(082102230026)

摘　　要：研究了独塔斜拉桥水滴形钢结构主塔在成桥状态下的力学特性。以安徽涡河三桥为工程实例,通过有限元计算分析,得到了水滴形钢结构主塔的位移及应力分布、三角形隔板及凹槽的局部应力以及主塔中应力最大部位的应力分布等力学规律。研究结果表明:在成桥状态下,主塔的变形以竖向变形为主,其整体变形较小,主塔刚度较大,截面设计合理;主塔的正应力、剪应力均以竖向为主,顺桥向和横桥向均较小,主塔主要处于受压状态;主塔第一主应力较小,第三主应力较大,Mises应力的变化规律与第三主应力较为一致;三角形隔板、凹槽以及主塔应力最大部位的应力值,在材料的容许应力范围内并具有适当的安全储备。Mechanical behavior of water-drop-shaped steel tower under completion state of bridge was studied.Based on the bridge on Guohe city in Anhui province,finite element method( FEM) was applied to calculate and analyze displacement and stress distribution of steel tower,the local stress of the triangle partitions and grooves,and the stress distribution of the maximum stress section. The results show that vertical deformation of the main tower is the major deformation under completion state of bridge,and the overall deformation is relatively small. The stiffness of the main tower is relatively big,and the section design is reasonable.Furthermore,the normal stress and shearing stress of steel tower are dominated by vertical stress,while longitudinal and lateral stresses are relatively small. The main tower is in the compression situation. The first main stress is relatively small,while the third main stress is relatively big. Variation of Mises-stress is similar with that of the third main stress. Finally,the stress values of the key joints are reasonable,which are in the allowable range of materials and has sufficient safety reserves.

关 键 词：独塔斜拉桥 水滴形钢结构主塔 位移 应力 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]