Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load
Impact loads widely exist in practical engineering and often cause cumulative damage and cracks or even fracture failure of concrete structures with their repeated long-term action. This experimental research is conducted on the damage evolution characteristics of concrete under impact loads by rega...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/2749540 |
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| _version_ | 1850157666532327424 |
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| author | Mingfeng Lei Linghui Liu Yuexiang Lin Jianjun Ma Chenghua Shi Weichao Yang |
| author_facet | Mingfeng Lei Linghui Liu Yuexiang Lin Jianjun Ma Chenghua Shi Weichao Yang |
| author_sort | Mingfeng Lei |
| collection | DOAJ |
| description | Impact loads widely exist in practical engineering and often cause cumulative damage and cracks or even fracture failure of concrete structures with their repeated long-term action. This experimental research is conducted on the damage evolution characteristics of concrete under impact loads by regarding C50 nonreinforced concrete as the research object and using a self-developed drop-weight device with electromechanical impedance measurement technology. Results show the following. (1) Under low-energy impact, concrete damage has long continuous development process and remarkable cumulative effects. An apparently sudden break characteristic appears before failure. Under high-energy impact, concrete damage accumulates rapidly, and piezoceramic patch signals grow linearly. (2) The root mean square deviation (RMSD) of the concrete increases exponentially with impact times. Particularly, when the RMSD exceeds 0.075, the concrete damage process enters the rapid development stage and approaches the critical failure state. (3) Under the experimental conditions in this study, the relationship between the ultimate impact times (damage life) and impact heights of the concrete samples shows the development trend of the power function. The above results can provide reference for the research on service life prediction methods of concrete structures under impact loads. |
| format | Article |
| id | doaj-art-34f3775012754fb0a26605e77bbe5da7 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-34f3775012754fb0a26605e77bbe5da72025-08-20T02:24:05ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/27495402749540Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact LoadMingfeng Lei0Linghui Liu1Yuexiang Lin2Jianjun Ma3Chenghua Shi4Weichao Yang5School of Civil Engineering, Central South University, Changsha, ChinaSchool of Civil Engineering, Central South University, Changsha, ChinaSchool of Aeronautics and Astronautics, Sun Yat-Sen University, Guangzhou 510006, ChinaSchool of Civil Engineering, Sun Yat-Sen University, Guangzhou 510006, ChinaSchool of Civil Engineering, Central South University, Changsha, ChinaSchool of Civil Engineering, Central South University, Changsha, ChinaImpact loads widely exist in practical engineering and often cause cumulative damage and cracks or even fracture failure of concrete structures with their repeated long-term action. This experimental research is conducted on the damage evolution characteristics of concrete under impact loads by regarding C50 nonreinforced concrete as the research object and using a self-developed drop-weight device with electromechanical impedance measurement technology. Results show the following. (1) Under low-energy impact, concrete damage has long continuous development process and remarkable cumulative effects. An apparently sudden break characteristic appears before failure. Under high-energy impact, concrete damage accumulates rapidly, and piezoceramic patch signals grow linearly. (2) The root mean square deviation (RMSD) of the concrete increases exponentially with impact times. Particularly, when the RMSD exceeds 0.075, the concrete damage process enters the rapid development stage and approaches the critical failure state. (3) Under the experimental conditions in this study, the relationship between the ultimate impact times (damage life) and impact heights of the concrete samples shows the development trend of the power function. The above results can provide reference for the research on service life prediction methods of concrete structures under impact loads.http://dx.doi.org/10.1155/2020/2749540 |
| spellingShingle | Mingfeng Lei Linghui Liu Yuexiang Lin Jianjun Ma Chenghua Shi Weichao Yang Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load Shock and Vibration |
| title | Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load |
| title_full | Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load |
| title_fullStr | Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load |
| title_full_unstemmed | Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load |
| title_short | Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load |
| title_sort | experimental investigation of damage evolution characteristics of c50 concrete under impact load |
| url | http://dx.doi.org/10.1155/2020/2749540 |
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