摘要
对现有索力测试方法进行归纳与总结,研究了拉索抗弯刚度、计算长度对频率法索力测试精度的影响规律,并对拉索抗弯刚度、计算长度对频率法索力测试精度的影响规律进行深入分析;针对某系杆拱桥开展索力测试,根据实测数据,采用回归分析的方法得到吊杆的抗弯刚度修正系数,结合恒载作用下吊杆长度增长值对计算长度进行修正,将修正后的索力计算公式与规范公式的计算结果进行对比,结果表明修正后的索力计算公式能够精准地计入抗弯刚度和计算长度对索力的影响,其索力计算结果误差小于5%,满足施工验收标准的要求。
This paper summarizes the existing cable force testing methods,and studies and deeply analyzes the influence law of cable bending stiffness and calculated length on the test accuracy of frequency cable force.In a arc bridge for cable force test,according to the measured data,the method of regression analysis is used to obtain the bending stiffness correction coefficient of the boom,and the calculated length is modified by combining the length growth value of the boom under dead load.The calculation results of the modified cable force formula are compared with those of the standard formula.The results show that the modified cable force calculation formula can accurately calculate the influence of bending stiffness and calculation length on the cable force,and the error of the cable force calculation result is less than 5%,which meets the requirements of the construction acceptance standard.
作者
王建宇
杨建荣
曾章波
裴志勇
WANG Jianyu;YANG Jianrong;ZENG Zhangbo;PEI Zhiyong(Faculty of Civil Engineering and Architectare,Kunming University of Science and Technology,Kunming 650500;不详)
出处
《工业安全与环保》
2021年第12期27-31,共5页
Industrial Safety and Environmental Protection
基金
国家自然科学基金(52068037)
中国电建集团华东勘察设计研究院有限公司科技立项项目(KY2019-JG-09)。
关键词
频率法
计算长度
抗弯刚度
修正系数
frequency method
calculated length
bending stiffness
correction factor
