考虑塔缆梁连接的自锚式悬索桥解析模型  被引量:1

Analytical model for self-anchored suspension bridge with towercable-girder connections

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作  者:刘双 陈志军[1] 曹鸿猷[2] 邵长宇 LIU Shuang;CHEN Zhijun;CAO Hongyou;SHAO Changyu(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;Shanghai Municipal Engineering Design Institute(Group)Co.Ltd.,Shanghai 200092,China)

机构地区:[1]华中科技大学土木与水利工程学院,湖北武汉430074 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070 [3]上海市政工程设计研究总院(集团)有限公司,上海200092

出  处:《华中科技大学学报(自然科学版)》2022年第1期75-81,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基  金:国家自然科学基金资助项目(51708436)。

摘  要:引入水平弹簧模拟塔-缆-梁连接关系,提出考虑塔梁及缆梁连接的自锚式悬索桥解析模型.以实桥为例,采用有限元法对提出模型进行验证,对缆梁及塔梁纵向连接刚度进行参数分析.结果表明:5种工况下,解析模型解与有限元解有较好的一致性,误差在10%以下;缆梁纵向约束对结构竖向刚度影响显著且会导致活载包络由W形转化为V形,主梁挠度控制工况也会随之改变;无论荷载形式如何,缆梁纵向约束刚度不会改变塔顶纵向位移且始终保持对称特性.塔梁纵向连接对结构竖向位移影响甚微,但对主梁纵向位移有较好限制.An analytical model of self anchored suspension bridge considering the connection of tower beam and cable beam was proposed.Taking the real bridge as an example,the proposed model was verified by finite element method,and the parameter analysis was carried out for the longitudinal connection stiffness of cable beam and tower beam.The results show that the analytical model solution is in good agreement with the finite element solution under five working conditions,and the error is less than 10%.The longitudinal restraint of cable beam has a significant impact on the vertical stiffness of the structure,and will lead to the transformation of live load envelope from W-shape to V-shape,and the deflection control condition of main beam will also change with it.No matter the load form,the longitudinal restraint stiffness of cable beam will not change the longitudinal displacement of tower top,and always maintain the symmetrical characteristics.The longitudinal connection between tower and beam has little effect on the vertical displacement of the structure,but it has a good limit on the longitudinal displacement of the main beam.

关 键 词:自锚式悬索桥 塔缆梁连接 挠度理论 约束刚度 解析模型 

分 类 号:U448.25[建筑科学—桥梁与隧道工程]

 

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