环境条件对短吊杆索力测试影响探析  

Analysis on the Influence of Environmental Conditions on the Cable Force Test of Short Suspender

作　　者：徐丹 XU Dan

机构地区：[1]福建省交通科研院有限公司,福建福州350004

出　　处：《福建建设科技》2023年第2期114-117,共4页Fujian Construction Science & Technology

摘　　要：吊杆是缆索结构中重要组成部分和受力构件,其工作状态关系着桥梁的安全性。短吊杆由于刚度大、受外界环境影响较大,其索力的精确测试一直是业内的研究热点问题之一。本文以一座典型悬索桥为工程背景,选取其中24根短吊杆为研究对象,基于振动频率法对其基频进行测试。通过设置3组不同环境条件下的测试方案,探析了温度及车辆荷载对短吊杆基频测试的影响及规律。检测结果可为桥梁运营期间的索力测试和养护工作提供参考。Suspender is an important force-bearing component of cable structure and its working state is related to the safety of bridge.Due to the high stiffness of short suspender and the great influence of external environment,the accuracy of testing of its cable force has always been one of the hot research issues.In this paper,a typical suspension bridge is chosen as the engineering background,24 short suspenders is selected as the research object,and its fundamental frequency is tested based on vibration frequency method.By setting up 3 groups of test schemes under different environmental conditions,the influence and rule of temperature and vehicle load on the fundamental frequency test of short suspender are analyzed.The test results can provide reference for cable force test and maintenance work during bridge operation.

关 键 词：短吊杆 索力测试 测试环境 振动频率法 

分 类 号：U446[建筑科学—桥梁与隧道工程]