摘要
为了准确地计算斜拉索索力值,利用数值法对考虑垂度和弯曲刚度影响的斜拉索运动方程式进行求解,同时还考虑了斜拉索上安装减振阻尼器对斜拉索基频的影响。本文基于整体割线坐标系下同时考虑垂度和弯曲刚度影响的斜拉索面内运动方程式,将斜拉索装设的减振阻尼器简化为弹性支撑,并在运动方程式的荷载项中考虑该弹性支撑作用,采用数值法进行离散化处理和求解,确定斜拉索索力。通过对泉州晋江大桥进行索力测量,利用数值法计算得到的索力值与公式法计算得到的结果进行比较。结果表明:两种方法计算得到的等效计算索长的差别不超过2%,索力值的偏差不超过5%,验证了提出的考虑减振阻尼器影响的斜拉索索力测定方法的正确性和开发的测试系统的可靠性。
In order to calculate the value of the tensile force of stay-cable,a numerical method is adopted to solve the motion equations of the stay-cable considering the effect of sag and bending stiffness. The influence of the dampers on the frequency of the stay-cable is also taken into consideration. Based on the motion equations in the local coordinate system considering the effect of sag and bending stiffness,the dampers on the stay-cable are considered as elastic supports. The supporting effect is taken into consideration in the load terms of the motion equations,which are solved by the numerical method. So the value of the tensile force of the cable is obtained. The tensile force of the cables of Quanzhou Jingjiang Bridge is measured. The measured result acquiredby the numerical way is compared with the one acquired by the formula method. The results prove that the difference between the equivalent cable lengths respectively acquired by the two different methods is less than 2%,and the difference between the values of tensile force is less than 5%. So the correctness of the method and the reliability of the measuring system are verified.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2018年第1期416-424,共9页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51678154)
教育部"新世纪优秀人才支持计划资助"(NCET-13-0737)
关键词
斜拉索
索力测定
减振阻尼器
数值方法
系统开发
stay cable
cable force measurement
damper
numerical method
system exploitation
