钢棒型短吊杆索力测试方法的比较分析  

Comparative analysis of method for measuring cable force of short suspender in arch bridge

作　　者：杨圣洁 邓年春[3] 王晓琳 董俊宝 姜维 YANG Sheng-jie;DENG Nian-chun;WANG Xiao-lin;DONG Jun-bao;JIANG Wei(School of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,China;Beijing Gongke Bridge Technology Co.,LTD.,Beijing 100088,China;School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Liuzhou OVM Structure Monitoring Technology Co.,LTD.,Liuzhou 545005,China;School of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545006 [2]北京公科固桥技术有限公司,北京100088 [3]广西大学土木建筑工程学院,南宁530004 [4]柳州欧维姆结构检测技术有限公司,广西柳州545005 [5]重庆大学光电工程学院,重庆400044

出　　处：《桂林理工大学学报》2022年第2期382-388,共7页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51868006);广西自然科学基金联合培育项目(2018GXNSFAA138067);桥梁结构安全技术国家工程实验室开放课题(2019-GJKFKT-1);广西科技计划项目(桂科AB17292018);广西高等学校高水平创新团队及卓越学者计划项目(桂教人[2018]35号)。

摘　　要：短吊杆是中、下承式钢管混凝土拱桥的核心承载构件,其使用期间的安全性和耐久性严重影响桥梁运营寿命。为了更好地监测拱桥短吊杆受力性能,采用光纤光栅传感方法和磁通量传感方法两种索力测量方法,对材质35CrMo、长度5.0 m、直径85 mm的钢棒型短吊杆试件进行索力测量试验。通过温度传感特性试验、短吊杆张拉性能试验进行对比分析,结果表明,两种传感方法测量的钢棒型短吊杆线性传感性能、重复性均较好,光纤光栅传感法索力测量误差约为±6%;而磁通量传感法索力误差最大为1.31%,测量误差稳定在±2%以内。两种测量方法均不受短吊杆长度、抗弯刚度等边界条件影响,较为适合拱桥短吊杆索力的长期监测,磁通量传感法测量短吊杆索力精度更为理想。The safety and durability of the short suspender,the core bearing member of the middle and lowerbearing concrete-filled steel tube concrete arch bridge,seriously affect the service life of the bridge.In order to better monitor the mechanical performance of the short suspender of arch bridge,two cable force measurement methods,fiber grating sensor method and elastomagnetic sensor method,were adopted to conduct experiment on the cable force measurement of the steel rod type short suspender,with material of 35CrMo,length of 5.0 m and diameter of 85 mm.The results show that the linear sensing performance and repeatability of the short suspender measured by the two sensors are good,and the cable force measurement error of the fiber Bragg grating sensor is about±6%.The maximum cable force error of elastomagnetic sensor is 1.31%,and the measurement error is within±2%.It is concluded that the two measurement methods won􀆳t be affected by short derrick boundary conditions,such as length,bending rigidity,and are more suitable for arch bridge completed short boom of long-term monitoring.The precision of elastomagnetic sensor completed short boom is more ideal.

关 键 词：短吊杆 索力测试 光纤光栅传感器 磁通量传感器 温度 

分 类 号：U446[建筑科学—桥梁与隧道工程]