[1]苏三庆,葛静,王威,等.门式刚架工字钢柱应力集中与磁记忆效应对应关系的试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(06):771-774,796.[doi:10.15986/j.1006-7930.2019.06.001]
　SU Sanqing,GE Jing,WANG Wei,et al.Experimental research on the corresponding relationship between stress concentration and magnetic memory effect of steel I-column of gabled framed[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(06):771-774,796.[doi:10.15986/j.1006-7930.2019.06.001]
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门式刚架工字钢柱应力集中与磁记忆效应对应关系的试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年06期
页码:
771-774,796
栏目:
出版日期:
2019-12-31

文章信息/Info

Title:
Experimental research on the corresponding relationship between stress concentration and magnetic memory effect of steel I-column of gabled framed
文章编号:
1006-7930(2019)06-0771-04
作者:
苏三庆; 葛静; 王威; 郭欢; 李成; 胡敬余
(西安建筑科技大学 土木工程学院，陕西 西安 710055)
Author(s):
SU Sanqing;  GE Jing;  WANG Wei;  GUO Huan;  LI Cheng;  HU Jingyu
(School of Civil Engineering, Xi′an Univ. of Arch. & Tech., Xi′an 710055, China)
关键词:
金属磁记忆检测; 应力集中; 工字钢柱; 对应关系; 无损检测; 门式刚架
Keywords:
metal magnetic memory testing;  stress concentration;  steel I-column;  corresponding relationship;  nondestructive testing;  gabled framed
分类号:
TU391
DOI:
10.15986/j.1006-7930.2019.06.001
文献标志码:
A
摘要:
通过对Q235门式刚架进行拟静力试验，检测其中钢柱表面的法向漏磁场，得到了不同荷载作用下磁记忆信号的法向分量，研究了磁信号在不同受力阶段的变化特征，建立了磁信号及其梯度值与应力集中部位的对应关系.试验结果表明：随着荷载的增加，磁信号法向分量先增加后减小，转折处可以较好的判断构件是否进入屈服阶段；Hp(y)值出现极值和反转现象，可以较好的判断应力集中部位；用梯度值出现极值判断应力集中位置，会出现偏差很小的延后现象，可以用来辅助判断应力集中.
Abstract:
Through the pseudo static test on gabled framed of Q235 low carbon steel, the normal leakage magnetic field on the surface of the steel column is detected, the normal component of metal magnetic memory signals under different loads are obtained, the variation characteristics of metal magnetic signals at different stress stages are studied, and the corresponding relationship between metal magnetic signals and their gradient value and stress concentration position is established. The test results show that the normal component of magnetic signal increases first and then decreases with the increase of loading, which can better determine whether the components enter the yield stage. The value of Hp(y) presents extreme value and reverse phenomenon, which can be used to judge the stress concentration position well; When the extreme value of gradient value is used to judge the stress concentration position, there will be a delay phenomenon with small deviation, which can be used to assist the judgment of stress concentration.

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备注/Memo

备注/Memo:
收稿日期:2018-10-03修改稿日期:2019-11-11
基金项目:国家自然科学基金项目(51878548,51578449)；陕西省自然科学基础研究计划(2018JZ5013)
第一作者:苏三庆(1961-)，男，教授，博士生导师，主要从事结构抗震设计、结构健康监测方面的研究. E-mail：sussq@xauat.edu.cnDOI:
更新日期/Last Update: 2020-01-20