|Table of Contents|

Experiment on detection of preload force in bolt clamp by pulling method(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2024年6期
Page:
72-80
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Experiment on detection of preload force in bolt clamp by pulling method
Author(s):
JIANG Shu-qing1; 2;  ZHOU Yong-jun1;  CAO Zi-yuan1;  WU Yu-hang1; LUO Zhi-ran1;  YANG Fan1;  ZHAO Yu1
(1. Engineering Research Center of Highway Large Structure, Ministry of Education,Chang'an University, Xi'an 710064, Shaanxi, China; 2. Guangxi Xingang Communications Investment Co. Ltd., Qinzhou 535000, Guangxi, China)
Keywords:
bridge engineering;  cable clamp screw;  model test;  preload force;  ultrasonic longitudinal wave;  pull-out method
PACS:
U44
DOI:
10.19721/j.cnki.1671-8879.2024.06.007
Abstract:
In order to reveal the causes of errors in the detection of screw preload force by the pull-out method and to improve measurement accuracy, the cable clamps of the Longmen Bridge were taken as the example. This study combined theoretical analysis with model experiments to study the mechanism of the pull-out method. A mechanical model of the effective preload force of the screw during two-stage by pull-out method was constructed. The M27 screw model was made indoors, and pressure sensors were used to detect the preload force of the nuts at both ends of the screw, the change law of the preload force during the tensioning process was analyzed, which verified the theoretical model. The MJ45 and MJ56 screw of the cable clamp of the Longmen Bridge was used, and the pull-out ultrasonic method for preload force was studied, the relationship between the ultrasonic time difference, the effective preload force, elongation and tension force of the screw was analyzed under different preload force conditions. The results show that the preload force of the screw is not constant but increases gradually with the increase of the tension force. When the nut is loosening, the tension force is usually 10% to 20% higher than the initial effective preload force, and the pull-out ultrasonic method can accurately capture the critical moment of nut loosening. This study proposes a detection reduction factor of 1.1 to 1.2 to address the errors that may occur during the detection process. The research results can provide a basis for the detection of screw preload force in actual engineering.1 tab, 13 figs, 21 refs.

References:

[1] 张鹏飞.悬索桥索夹螺杆预紧力下降原因分析与预防性养护对策[J].公路,2019,64(2):101-105.
ZHANG Peng-fei.Cause analysis and preventive maintenance countermeasures of pre-tightening force reduction of cable clamp screw of suspension bridge[J].Highway,2019,64(2):101-105.
[2]唐 亮,王 熠,崔 冰,等.悬索桥索夹螺杆应力无损检测研究[J].公路,2015,60(10):125-129.
TANG Liang,WANG Yi,CUI Bing,et al.Study on nondestructive testing of cable clamp screw stress of suspension bridge[J].Highway,2015,60(10):125-129.
[3]张 俊,顾临怡,钱筱林,等.钢结构工程中高强度螺栓轴向应力的超声测量技术[J].机械工程学报,2006,42(2):216-220.
ZHANG Jun,GU Lin-yi,QIAN Xiao-lin,et al.Ultrasonic measurement of high strength bolt axial tension in steel construction[J].Chinese Journal of Mechanical Engineering,2006,42(2):216-220.
[4]JHANG K Y,QUAN H H,HA J,et al.Estimation of clamping force in high-tension bolts through ultrasonic velocity measurement[J].Ultrasonics,2006,44(S1):1339-1342.
[5]丁 旭,武新军.在役螺栓轴力电磁超声测量系统的研制[J].无损检测,2016,38(6):48-52,64.
DING Xu,WU Xin-jun.Development of EMAT based axial load measurement system for in-service bolts[J].Nondestructive Testing Technologying,2016,38(6):48-52,64.
[6]徐春广,李焕新,王俊峰,等.残余应力的超声横纵波检测方法[J].声学学报,2017,42(2):195-204.
XU Chun-guang,LI Huan-xin,WANG Jun-feng,et al.Ultrasonic shear and longitudinal wave testing method of residual stress[J].Acta Acustica,2017,42(2):195-204.
[7]何星亮,陈 平,刘华强.基于超声模式转换的螺栓轴向应力测量方法[J].振动与冲击,2021,40(21):201-206.
HE Xing-liang,CHEN Ping,LIU Hua-qiang.Measurement method of bolt axial stress based on ultrasonic mode conversion[J].Journal of Vibration and Shock,2021,40(21):201-206.
[8]刘家斌,王雪梅,倪文波.螺栓轴向应力-超声波渡越时间自动标定系统研究[J].中国测试,2020,46(3):91-96.
LIU Jia-bin,WANG Xue-mei,NI Wen-bo.Research on automatic calibration system of bolt axial stress-ultrasonic time of flight[J].China Measurement & Test,2020,46(3):91-96.
[9]胡可宁,陈 义,伊建军,等.悬索桥索夹螺杆轴力超声检测系统的研制[J].公路工程,2023,48(1):55-59.
HU Ke-ning,CHEN Yi,YI Jian-jun,et al.R & D of ultrasonic testing system for axial force of bolts in cable clamps of suspension bridge[J].Highway Engineering,2023,48(1):55-59.
[10]贾 雪,王雪梅,甘文成,等.声弹性效应螺栓轴向应力标定试验研究[J].中国测试,2018,44(3):23-27.
JIA Xue,WANG Xue-mei,GAN Wen-cheng,et al.Research on calibration of bolt's axial stress based on acoustoelastic effect[J].China Measurement & Test,2018,44(3):23-27.
[11]伊建军,彭旭民,王 波,等.悬索桥索夹螺杆轴力超声检测技术[J].桥梁建设,2019,49(增1):68-73.
YI Jian-jun,PENG Xu-min,WANG Bo,et al.Ultrasonic testing technology for axial force of cable clamp screw of suspension bridge[J].Bridge Construction,2019,49(S1):68-73.
[12]伊建军,高 天,荆国强,等.悬索桥已紧固索夹螺杆轴力超声纵波测量方法[J].桥梁建设,2021,51(6):39-44.
YI Jian-jun,GAO Tian,JING Guo-qiang,et al.Ultrasonic longitudinal wave inspection method for axial forces of bolts in cable clamps of suspension bridge[J].Bridge Construction,2021,51(6):39-44.
[13]SUN Q C,YUAN B,MU X K,et al.Bolt preload measurement based on the acoustoelastic effect using smart piezoelectric bolt[J].Smart Material Structures,2019,28(5):055005.
[14]LIU Y M,LIU E X,CHEN Y L,et al.Measurement of fastening force using dry-coupled ultrasonic waves[J].Ultrasonics,2020,108:106178.
[15]陈 鑫,朱劲松,叶仲韬,等.基于高斯回波包络模型的悬索桥索夹螺杆轴力识别[J].桥梁建设,2021,51(3):56-61.
CHEN Xin,ZHU Jin-song,YE Zhong-tao,et al.Axial load identification for cable clamp bolts in suspension bridge based on Gaussian echo envelop model[J].Bridge Construction,2021,51(3):56-61.
[16]潘勤学,常梅乐,潘瑞鹏,等.螺栓轴向应力的非线性超声检测技术研究[J].机械工程学报,2021,57(22):88-95.
PAN Qin-xue,CHANG Mei-le,PAN Rui-peng,et al.Research on nonlinear ultrasonic testing technology of bolt axial stress[J].Journal of Mechanical Engineering,2021,57(22):88-95.
[17]严 勇,刘楚达.风电螺栓轴向应力超声测量标定实验研究[J].应用声学,2021,40(4):594-601.
YAN Yong,LIU Chu-da.Experimental study on ultrasonic measurement and calibration of axial stress of wind turbine bolt[J].Journal of Applied Acoustics,2021,40(4):594-601.
[18]蔡依花,陶思雨,郑晓东,等.超声纵波法测量索夹螺杆轴力的误差分析[J].公路,2023,68(1):141-147.
CAI Yi-hua,TAO Si-yu,ZHENG Xiao-dong,et al.Error analysis of axial force of cable clamp screw by ultrasonic longitudinal wave method[J].Highway,2023,68(1):141-147.
[19]陈 鑫,朱劲松,叶仲韬,等.悬索桥索夹螺杆轴力超声识别的影响因素分析及应用[J].工程科学与技术,2021,53(6):142-147.
CHEN Xin,ZHU Jin-song,YE Zhong-tao,et al.Influence factor analysis and application of ultrasonic method for identifying cable clamp bolt axial force in suspension bridge[J].Advanced Engineering Sciences,2021,53(6):142-147.
[20]HUGHES D S,KELLY J L.Second-order elastic deformation of solids[J].Physical Review,1953,92(5):1145-1149.
[21]周勇军,贾利强,杨 帆,等.考虑主缆镀锌层蠕变的索夹螺杆紧固力损失预测研究[J].中国公路学报,2024,37(7):157-167.
ZHOU Yong-jun,JIA Li-qiang,YANG Fan,et al.Research on preload loss prediction of clamp bolt considering cable creep of galvanized layer[J].China Journal of Highway and Transport,2024,37(7):157-167.

Memo

Memo:
-
Last Update: 2024-12-30