| 引用本文: | 王云洋,薛常喜,牛建伟,丁思齐,韩宝国.水泥基传感器与混凝土的应变协调性分析[J].哈尔滨工业大学学报,2015,47(9):95.DOI:10.11918/j.issn.0367-6234.2015.09.018 |
| WANG Yunyang,XUE Changxi,NIU Jianwei,DING Siqi,HAN Baoguo.Strain compatibility analysis on cement-based sensors and concrete[J].Journal of Harbin Institute of Technology,2015,47(9):95.DOI:10.11918/j.issn.0367-6234.2015.09.018 |
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| 水泥基传感器与混凝土的应变协调性分析 |
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王云洋1,薛常喜2,3,牛建伟1,丁思齐1,韩宝国1
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(1.大连理工大学 土木工程学院, 116024 辽宁 大连; 2.哈尔滨工业大学 土木工程学院, 150090 哈尔滨; 3.青岛北洋建筑设计有限公司,266000 山东 青岛)
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| 摘要: |
| 为研究镍粉水泥基传感器应用于混凝土结构健康监测过程中传感器与周围混凝土的应变协调性,采用有限元软件ANSYS建立传感器与混凝土模型,计算改变传感器的埋设位置及偏斜角度、混凝土强度等级、荷载大小及类型等条件下传感器与周围混凝土的应力和应变值,并采用传感器与混凝土之间的应变相对差对它们之间的应变协调性进行分析.结果表明：传感器应埋设在应变均匀的中心区域,避免埋在表层；小角度偏斜对监测准确性影响不大；传感器应用于混凝土结构健康监测需综合考虑混凝土强度等级、荷载大小及类型等因素对监测结果的影响；应变相对差可以较好地反映传感器与周围混凝土的应变协调程度. |
| 关键词: 镍粉水泥基传感器 结构健康监测 应变协调程度 有限元分析 监测准确性 |
| DOI：10.11918/j.issn.0367-6234.2015.09.018 |
| 分类号:TB381 |
| 基金项目:教育部新世纪优秀人才支持计划(NCET-11-0798)； 国家科技支撑计划(2011BAK02B01)； 中央高校基本科研业务费专项资金. |
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| Strain compatibility analysis on cement-based sensors and concrete |
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WANG Yunyang1,XUE Changxi2,3,NIU Jianwei1,DING Siqi1,HAN Baoguo1
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(1. School of Civil Engineering, Dalian University of Technology, 116024 Dalian,Liaoning,China;2. School of Civil Engineering,Harbin Institute of Technology, 150090 Harbin,China;3.Qingdao Beiyang Design Group Co., Ltd., 266000 Qingdao, Shandong, China)
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| Abstract: |
| In order to study the strain compatibility of the nickel powder-filled cement based sensors and their surrounding concrete, the models of the sensors and concrete were set up by finite element software ANSYS. The stress and strain of the sensors and their surrounding concrete were calculated based on different embedded locations and angle deflections of the sensors, strength grades of concrete, and magnitudes and types of load. The strain compatibility of the sensors and their surrounding concrete were analyzed through the relative difference of strain. The results show that the sensors should be embedded in the internal homogeneous strain area of concrete members, rather than being embedded in the superficial area. The small angle deflection has little effect on the monitoring accuracy. As the sensors are used for health monitoring of concrete structures, the effect of strength grade of concrete and magnitudes and types of load should be systematically considered. The degree of strain compatibility of the sensors and their surrounding concrete can be better reflected by relative difference of strain. |
| Key words: nickel powder-filled cement-based sensor structural health monitoring degree of strain compatibility finite element analysis monitoring accuracy |
