摘要
自锚式悬索桥主塔设计过高,会使得梁端竖向分力较大,导致此类桥型中有相当一部分短吊索的索力难以识别。文章基于频率法的基本原理,以邵阳市桂花大桥悬索桥施工监控为工程背景,归纳和总结吊索的抗弯刚度、线密度及计算索长等因素对索力测试的影响,提出了考虑抗弯刚度和边界条件的索力识别方法。该方法应用到桂花大桥的索力测试,结果表明该方法的正确性。
The design of the main tower of self-anchored suspension bridge is too high,which will cause a large vertical force at the end of the beam.Therefore,it is difficult to identify the cable forces of a considerable part of the short suspension cables in this type of bridge.Based on the basic principle of frequency method,this paper took the construction monitoring of Guihua suspension bridge in Shaoyang City as the engineering background,summarized the influence of the bending stiffness,linear density and cable length of suspension cables on force test,and proposed a cable force identification method considering bending stiffness and boundary conditions.The method was applied to the cable force test of Guihua Bridge,and the results showed that the method is correct.
作者
李米智
李强
夏志辉
彭国新
LI Mi-zhi;LI Qiang;XIA Zhi-hui;PENG Guo-xin(Guangzhou Mass Transit Engineering Consultant Co.,Ltd.,Guangzhou,Guangdong 510010,China)
出处
《企业技术开发》
2018年第12期44-49,共6页
Technological Development of Enterprise
关键词
自锚式悬索桥
索力测试
抗弯刚度
边界条件
Self-anchored suspension bridge
Cable force test
Bending stiffness
Boundary condition
