增设悬索法加固大跨度钢桁梁桥的最优矢跨比分析  

Analysis of Optimal Vector-span Ratio of Long-span Steel Truss Bridge Strengthened by Adding Suspension Cable Method

作　　者：贾云 李睿[1] 刘迪 施爱朝 聂根川 JIA Yun;LI Rui;LIU Dil;SHI Ai-chao;NIE Gen-chuan(School of Civil Engineering,Kunming University of Science and Technology,Kunming 650504,China;Dali Yunlong Highway Administration Branch,Dali 672700,China;Yunnan Ruide Road and Bridge Engineering Design Co.Ltd.,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明市650504 [2]大理云龙公路分局,大理市672700 [3]云南眷德道路桥梁工程设计有限公司,昆明市650500

出　　处：《公路》2021年第7期105-110,共6页Highway

基　　金：国家自然科学基金项目,项目编号51568029;云交科项目,项目编号2014(A)26。

摘　　要：矢跨比是悬索法加固的一个重要参数,对结构刚度有很大的影响。针对一座大跨度钢桁梁桥采用增设悬索法加固,设置不同的矢跨比,采用有限元软件建立全桥模型模拟1/9、1/10、1/11等3种矢跨比加固后大桥的各杆件的挠度、应力、结构自振频率,得出增设悬索法加固大跨度钢桁梁桥的最优矢跨比。分析结果可为同类型桥梁加固提供参考。The vector-to-span ratio is an important parameter for the reinforcement by the suspension cable method and has a great influence on the structural rigidity.In this paper,a large-span steel truss bridge is reinforced by adding a suspension cable method,and different vector-span ratios are set to obtain changes in the reinforcement effect.The whole bridge model is established by using the finite element software,and the deflection,stress and structural natural frequency of each component of the bridge strengthened with 1/9,1/10 and 1/11 span ratios are simulated.The optimal rise/span ratio of steel truss bridge provides a reference for the strengthening of similar bridges.

关 键 词：钢桁梁桥 大跨度 加固 悬索法 矢跨比 分析 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]