摘要
在已知吊杆振动基频的条件下,为获得准确的吊杆索力,通过在工程实例中进行分级张拉的方式,对已有的各种索力计算方法进行了验证分析.结果表明:文献[1]中给出的计算公式与分级张拉验证结果吻合较好;仪器厂家给出的公式忽略了吊杆抗弯刚度的影响,吻合度较差.对于旧桥索力检测,可不必对K值进行校正,直接采用文献[1]中给出的计算公式进行计算.
Under the condition of the known fundamental vibration frequency of the suspender,in order to obtain an accurate boom cable force,various existing cable force calculation methods through the method of graded tension in the engineering example are verified and analyzed.It can be known that the calculation formula given in the literature[1]is in good agreement with the results of the graded tension verification.The influence of the flexural rigidity of the suspender in the formula given by the instrument manufacturer is ignored,and the fit is poor.From the analysis results in this paper,for the old bridge cable force detection,it is not necessary to correct the K value,and directly use the calculation formula given in the literature[1]for calculation.
作者
马万良
MA Wan-liang(Lanzhou Jiaotong University Engineering Testing Co.,Ltd,Lanzhou 730070,China)
出处
《兰州工业学院学报》
2021年第2期22-26,共5页
Journal of Lanzhou Institute of Technology
关键词
尼尔森体系系杆拱
吊杆
基频
索力
计算方法
Nelson system tied arch
suspender
fundamental frequency
cable force
calculation method