[1]谈志成,马中军,张 铟.基于局部刚度识别和曲率模态的梁结构状态预警方法[J].西安建筑科技大学学报:自然科学版,2013,45(06):847-852,863.[doi:10.15986/j.1006-7930.2013.06.016]
 TAN Zhi-cheng,MA Zhong-jun,ZHANG Yin.Beam Early Warning Method based on local stiffness detection and mode shape curvature[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2013,45(06):847-852,863.[doi:10.15986/j.1006-7930.2013.06.016]
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基于局部刚度识别和曲率模态的梁结构状态预警方法()
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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:
45
期数:
2013年06期
页码:
847-852,863
栏目:
出版日期:
2013-12-31

文章信息/Info

Title:
Beam Early Warning Method based on local stiffness detection and mode shape curvature
文章编号:
1006-7930(2013)06-0847-06
作者:
谈志成1马中军23张 铟1
(1.南阳理工学院建筑设计院,河南 南阳 473004; 2.武汉理工大学土木工程与建筑学院,湖北 武汉 430070; 3.南阳理工学院土木工程学院,河南 南阳 473004)
Author(s):
TAN Zhi-cheng1MA Zhong-jun23ZHANG Yin1
(1.Architecture Design Institute, Nanyang Institute of Technology, Nanyang 473004,China; 2.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China; 3.School of Civil Engineering, Nanyang Institute of Technology, Nanyang 473004, China)
关键词:
预警刚度局部曲率
Keywords:
beam early warning stiffness local curvature
分类号:
TU 317
DOI:
10.15986/j.1006-7930.2013.06.016
文献标志码:
A
摘要:
为了对局部抗弯刚度具有不确定性的梁结构进行损伤识别和状态预警,基于虚拟分割的概念,对服役前的梁按简支工况进行静力加载,按照一种新的加载制度和跨中挠度数据处理方法可通过求解线性方程组来得到各区间的真实局部抗弯刚度值,利用得到的刚度数据可以建立有限元模型.进而对服役中的梁进行模态识别,采用曲率模态指标来进行损伤定位.研究结果表明:新方法可以有效地区分损伤和初始不确定的局部抗弯刚度,实现对真实损伤的识别,而且可以不影响梁的正常使用.
Abstract:
Highlighted in this paper is the damage detection and status early warning of beam structures with uncertain local flexural stiffness. Based on the concept of Suppositional Partition, static load is applied to the beam before serving and the beam should be simply supported. By using a novel loading system and mid-span deflection data processing method, actual local flexural stiffness value of each interval can be obtained by solving a set of linear equations. The obtained local stiffness data can be used to establish the finite element model of beams. Subsequently, mode identification is carried out for the beam in service and mode shape curvature index has been employed to detect the position of damage. Research results show that damage and original uncertainty of local flexural stiffness can be differentiated by this new method effectively and then the actual damage can be detected. Moreover, serviceability of the beam will not be affected

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-03-05 修改稿日期:2013-11-25
基金项目:国家自然科学基金资助项目(50978151);河南省科技攻关项目(122102210165)
作者简介:谈志成(1974-),男,河南信阳人,高级工程师,主要研究方向为结构损伤、复杂结构研究等.
更新日期/Last Update: 2015-10-05