HDPE管与拉索接触相对长度对索力的影响  

Effect of HDPE Cube and the Relative Length of the Casing on the Cable Force

作　　者：周广耀 朱祎鹏 Zhou Guangyao;Zhu Yipeng(School of Civil Engineering and Architecture,Three Gorges University,Yichang 443000,China)

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443000

出　　处：《黑龙江科学》2024年第4期92-93,98,共3页Heilongjiang Science

摘　　要：为了准确测量平行钢绞线拉索内部接触情况对索力的影响,对其截面特性及索力力学关系进行分析,研究内部接触的不同影响机理。施工中为避免钢绞线的锈蚀,采取在拉索上套HDPE管的防护措施,对此进行试验验证。实验结果显示,HDPE管的自重是拉索的重要影响因素,当HDPE管与拉索接触时,拉索振动行为表现出整体性及独立性,导致各部分振动发生耦合,耦合振动具有一致性,为通过振动频率法测量总索力提供了理论基础,但在非接触区域测得的频率并非拉索的真实频率,因此对于非常规的平行钢绞线拉索,当HDPE管与拉索索股的接触耦合不完好时,测得的频率误差超出规范要求且不能忽视。应用修正公式计算索力,可满足工程需求,提高索力的计算精度。In order to accurately measure the influence of the internal contact of the parallel strand cable on the cable force,the study analyzes the cross-sectional characteristics and the mechanical relationship of the cable,and the different influence mechanisms of the internal contact.In order to avoid the rust of the steel strand,the study adopts the protective measures of HDPE pipe on the cable,and conducts the relevant tests.The experimental results show that the self-weight of HDPE pipe is an important influencing factor of cable.When the HDPE pipe is in contact with the cable,the vibration behavior of the cable shows integrity and independence,resulting in the coupling of the vibration of each part,and the coupled vibration is consistent,which provides a theoretical basis for measuring the total cable force by the vibration frequency method.However,in the non-contact area,the measured frequency is not the true frequency of the cable.Therefore,for unconventional parallel steel strand cables,when the contact coupling between HDPE pipe and cable strands is not intact,the measured frequency error exceeds the specification requirements and cannot be ignored.By applying the correction formula to calculate the cable force,it can meet the engineering needs and improve the calculation accuracy of the cable force.

关 键 词：索力测量 频率法 斜拉索 HDPE套管 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]