摘要
以简支梁为研究对象,基于光纤光栅传感技术,获得简支梁的应变分布,再通过应变与曲率的函数关系,结合信息熵理论,构建广义局部信息熵曲率损伤指标,建立简支梁损伤识别方法。为验证该指标在简支梁中的不同位置及不同程度的损伤识别效果,采用结构有限元软件建立钢筋混凝土简支梁数值模型,从数值模拟角度验证了该方法的有效性。结果表明:广义局部信息熵曲率损伤指标能准确定位桥梁损伤位置,且识别简单、高效。由于所建立的损伤识别方法仅依赖应变数据,可用于桥梁结构检测。
In this paper, the simply supported beam is taken as the research object, and the strain distribution of the simply supported beam is calculated based on the fiber grating sensing technology. Based on the relationship between strain and curvature, combined with the generalized local information entropy theory, the generalized local information entropy curvature damage index is constructed, and the damage identification method of simply supported beam is established. In order to verify the damage recognition effect of the index in different positions in the simply supported beam and different damage levels, this paper verifies the effectiveness of the established damage identification method from the perspective of numerical simulation. The numerical model of reinforced concrete simply supported beam is established by using structural finite element software. The results show that the generalized local information entropy curvature damage index can accurately locate the damage location, and the recognition is simple and efficient. Since the established damage identification method relies only on strain data, it can be used for bridge structure detection.
作者
胡汉敏
张超
Theory HU Hanmin;ZHANG Chao(Fuzhou University of International Studies and Trade,Fuzhou,Fujian 350202,China;Shanghai Tonghao Civil Engineering Consulting Co.LTD,Shanghai,200000,China)
出处
《龙岩学院学报》
2019年第2期25-29,共5页
Journal of Longyan University
关键词
广义信息曲率熵
曲率
损伤识别
简支梁
generalized information curvature entropy
curvature
damage identification
simply supported beam
