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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第11卷    第3期    总第59期    2014年6月

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文章编号:1672-7029(2014)03-0017-06
基于频率法的平行钢绞线索索力测试研究
孙增寿,赵云鹏,秦磊

(郑州大学 土木工程学院,河南 郑州 450001)

摘 要: 斜拉索索力是桥梁施工控制和桥梁受力的重要指标,以光武大桥为工程背景,用频率法进行平行钢绞线斜拉索索力的测试和分析研究。采用有限元方法建立斜拉索模型、HDPE套管模型以及斜拉索-套管整体的接触耦合模型,进行斜拉索结构的动力性能分析,从斜拉索振动频率与索力的对应关系分析可以看出:频率法可用于平行钢绞线斜拉索的索力测试,HDPE套管能够传递和反映内部索体的振动,但必须考虑HDPE套管的影响,根据HDPE套管质量修正斜拉索线密度,提高了斜拉索索力测量和计算的准确度。

 

关键字: 频率法;平行钢绞线索;索力测试;套管重量;索力修正

Research of tension measurement of parallel steel stranded wire cable based on frequency method
SUN Zengshou, ZHAO Yunpeng, QIN Lei

Civil Engineering College, Zhengzhou University, Zhengzhou 450002, China

Abstract:The stay cable tension is an important index of construction control and load-carrying capability of cable stayed bridge. The Guangwu bridge is taken as engineering background. The tension measurement of parallel steel stranded wire stay cable was tested and analyzed based on frequency method. The finite element method was utilized to establish the cable model, the HDPE casing model and the contact coupling model of cable and casing. Dynamic performance of the stay cable structure was evaluated. The following conclusions can be obtained from the analysis of corresponding relationship between vibration frequency and cable tension. The frequency method can be adopted to tension measurement of the parallel steel strand wire stay cable. HDPE casing can transfer and reflect the vibration of internal stay cable. But the influence of HDPE casing must be considered. The line density of stay cable should be modified according to the quality of the HDPE casing of cable, which can improve the accuracy of tension measurement and calculation of the stay cable.

 

Key words: frequency method; parallel steel stranded wire stay cable; cable tension measurement; weight of casing; modification of cable tension

ISSN 1672-7029
CN 43-1423/U

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