结构损伤全历程监测的多标距测试方法  

Multiple Gauge-length Assembly Based Measuring Method on Whole-history Information of Structural Damage

作　　者：王花平[1] 周智[1] 王俊[1] 高锡鹏 

机构地区：[1]大连理工大学土木工程学院,辽宁大连116023

出　　处：《公路工程》2016年第1期51-54,共4页Highway Engineering

基　　金：国家973基础研究项目(2011CB013705);国家863计划(2014AA110401)

摘　　要：结构健康监测领域中损伤全历程信息捕捉一直未得到较好的解决,常常出现为兼顾结构大变形监测而导致微小、早期损伤不被识别的现象。为此,从集成角度,利用现有的测试技术,形成多种标距组装测试的方法,在合理的成本范围内实现结构整体变形和局部损伤高精度的全历程监测。具体内容为:利用不同标距长度的感知元件,如应变片,通过串联或并列方式构建损伤全历程监测的多标距测试探头。在方法及结构损伤的全历程特征陈述基础上,采用不同标距应变片对标准混凝土立方体试块的轴向受压变形进行了测试,实验结果说明了该方法能较好地实现结构损伤全历程信息的监测。Capturing the whole-history information of damage in structure field has always been a problem urgent to be solved. The common phenomenon is that high attention of large deformation monitoring often leads to the poor recognition of micro or early-stage damage. For this reason,inspired by the conception of integration,a measuring method based on various gauge-length sensors assembly is developed to realize the whole-history monitoring of integral deformation and local damage. The core content is that different gauge-length sensing elements,such as strain gauge,installed in series or paralleling,are introduced to establish the test probe on whole-history damage detection. Given the analysis above,different gauge-length strain gauges are adopted to monitor the deformation of standard-cube concrete under axial compression. Experiments indicates that the proposed method in this article could well obtain the wholehistory information of damage.

关 键 词：结构损伤 全历程监测 多种标距联合测试方法 不同标距长度的应变片 实验论证 

分 类 号：U414.1[交通运输工程—道路与铁道工程]