自锚式悬索桥合理成桥状态静力特性试验研究  

Study on Static Charac Teristics in Reasonable Finished State of Self-anchored Suspension Bridge

作　　者：万利军[1] 单炜[1] 姜华[1] 

机构地区：[1]东北林业大学工程咨询设计研究院,黑龙江哈尔滨150040

出　　处：《公路工程》2014年第5期155-159,共5页Highway Engineering

摘　　要：依托某双塔对称体系自锚式悬索桥,按几何缩尺比1∶50进行模型静力性能试验研究。模型设计上运用基于刚度相似原理的方程式分析法,获得了多相介质缩尺模型与结构原型的静力相似判据。采用模型试验与有限位移理论相互印证的手段,研究了自锚式悬索桥结构体系在合理成桥状态下的静力学特性。结果表明:除塔附近加强吊杆外,全桥吊索应力分布较为均匀;主缆应力分布特征与主缆线形具有较强相关性;加劲梁在弯矩与轴力组合作用下,上下缘应力分布较为均匀,线形符合设计要求;成桥状态各构件安全储备较大;模型验测试值与理论计算值吻合较好,同时印证了缩尺模型设计的合理性。Relying on a self-anchored suspension bridge supported by symmetric twin towers,we made an experimental study on the whole bridge scale model by the proportion of 1 ∶ 50. An equation analysis method was carried out through the model design based on Stiffness Similarity Theory. We got static criterion of similarity on the multiphase medium scale model and the prototype structure. With the mutually confirmed method by the model test and finite displacement theory,studied the static characteristics of structural system in reasonable finished state of a self-anchored suspension bridg. Results show that：Except the strengthen suspenders beside the tower,the stress distribution on the slings of the whole bridge was more uniform; There was a high correlation between the characteristics of main cable stress distribution and the line type of main cable; Under the combined action of bending moment and axial force,the stress distribution of upper and lower edge on the Stiffening girder was relatively uniform,line type met the requirements of design; The elements of bridge completion state had large safety reserve. Model test value coincided well with theoretical calculating value,meanwhile confirmed the rationality of the design about the scale model.

关 键 词：自锚式悬索桥 合理成桥状态 相似理论 模型试验 静力特性 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]