A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads
Impact loads can have major adverse effects on the safety of civil engineering structures, such as concrete-filled steel tubular (CFST) columns. The study of mechanical behavior and stress analysis of CFST columns under impact loads is very important to ensure their safety against such loads. At pre...
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| Format: | Article |
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MDPI AG
2018-05-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/6/1682 |
| _version_ | 1798039959628677120 |
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| author | Guofeng Du Zhao Li Gangbing Song |
| author_facet | Guofeng Du Zhao Li Gangbing Song |
| author_sort | Guofeng Du |
| collection | DOAJ |
| description | Impact loads can have major adverse effects on the safety of civil engineering structures, such as concrete-filled steel tubular (CFST) columns. The study of mechanical behavior and stress analysis of CFST columns under impact loads is very important to ensure their safety against such loads. At present, the internal stress monitoring of the concrete cores CFST columns under impact loads is still a very challenging subject. In this paper, a PVDF (Polyvinylidene Fluoride) piezoelectric smart sensor was developed and successfully applied to the monitoring of the internal stress of the concrete core of a CFST column under impact loads. The smart sensor consists of a PVDF piezoelectric film sandwiched between two thin steel plates through epoxy. The protection not only prevents the PVDF film from impact damages but also ensures insulation and waterproofing. The smart sensors were embedded into the circular concrete-filled steel tube specimen during concrete pouring. The specimen was tested against impact loads, and testing data were collected. The time history of the stress obtained from the PVDF smart sensor revealed the evolution of core concrete internal stress under impact loads when compared with the impact force–time curve of the hammer. Nonlinear finite element simulations of the impact process were also carried out. The results of FEM simulations had good agreement with the test results. The results showed that the proposed PVDF piezoelectric smart sensors can effectively monitor the internal stress of concrete-filled steel tubular columns under impact loads. |
| first_indexed | 2024-04-11T22:00:53Z |
| format | Article |
| id | doaj.art-edac124be3ab40cfad706bb8276cab4a |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:00:53Z |
| publishDate | 2018-05-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-edac124be3ab40cfad706bb8276cab4a2022-12-22T04:00:56ZengMDPI AGSensors1424-82202018-05-01186168210.3390/s18061682s18061682A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact LoadsGuofeng Du0Zhao Li1Gangbing Song2School of Urban Construction, Yangtze University, Jingzhou 434023, ChinaSchool of Urban Construction, Yangtze University, Jingzhou 434023, ChinaDepartment of Mechanical Engineering, University of Houston, Houston, TX 77204, USAImpact loads can have major adverse effects on the safety of civil engineering structures, such as concrete-filled steel tubular (CFST) columns. The study of mechanical behavior and stress analysis of CFST columns under impact loads is very important to ensure their safety against such loads. At present, the internal stress monitoring of the concrete cores CFST columns under impact loads is still a very challenging subject. In this paper, a PVDF (Polyvinylidene Fluoride) piezoelectric smart sensor was developed and successfully applied to the monitoring of the internal stress of the concrete core of a CFST column under impact loads. The smart sensor consists of a PVDF piezoelectric film sandwiched between two thin steel plates through epoxy. The protection not only prevents the PVDF film from impact damages but also ensures insulation and waterproofing. The smart sensors were embedded into the circular concrete-filled steel tube specimen during concrete pouring. The specimen was tested against impact loads, and testing data were collected. The time history of the stress obtained from the PVDF smart sensor revealed the evolution of core concrete internal stress under impact loads when compared with the impact force–time curve of the hammer. Nonlinear finite element simulations of the impact process were also carried out. The results of FEM simulations had good agreement with the test results. The results showed that the proposed PVDF piezoelectric smart sensors can effectively monitor the internal stress of concrete-filled steel tubular columns under impact loads.http://www.mdpi.com/1424-8220/18/6/1682concrete-filled steel tubular (CFST) columnPVDF (Polyvinylidene Fluoride)piezoelectric sensorimpact sensorembeddable sensorimpact testinternal stress monitoring |
| spellingShingle | Guofeng Du Zhao Li Gangbing Song A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads Sensors concrete-filled steel tubular (CFST) column PVDF (Polyvinylidene Fluoride) piezoelectric sensor impact sensor embeddable sensor impact test internal stress monitoring |
| title | A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads |
| title_full | A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads |
| title_fullStr | A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads |
| title_full_unstemmed | A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads |
| title_short | A PVDF-Based Sensor for Internal Stress Monitoring of a Concrete-Filled Steel Tubular (CFST) Column Subject to Impact Loads |
| title_sort | pvdf based sensor for internal stress monitoring of a concrete filled steel tubular cfst column subject to impact loads |
| topic | concrete-filled steel tubular (CFST) column PVDF (Polyvinylidene Fluoride) piezoelectric sensor impact sensor embeddable sensor impact test internal stress monitoring |
| url | http://www.mdpi.com/1424-8220/18/6/1682 |
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