Experimental Research on Fracture Behavior of Concrete after High Temperature
High-strength concrete has been widely used in various complex buildings. The fracture and mechanical properties of high-strength concrete after fire have great research value. Based on the double K fracture model, the fracture properties of C50 and C70 strength grade concrete after being processed...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2019-08-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2467 |
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| _version_ | 1846145558383689728 |
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| author | Peng Qiu |
| author_facet | Peng Qiu |
| author_sort | Peng Qiu |
| collection | DOAJ |
| description | High-strength concrete has been widely used in various complex buildings. The fracture and mechanical properties of high-strength concrete after fire have great research value. Based on the double K fracture model, the fracture properties of C50 and C70 strength grade concrete after being processed by high temperature of 25 °C ~800 °C were studied by three-point bending beam test. The changes of fracture toughness Kic and fracture energy at different temperatures after being processed by high temperature were analyzed. The results showed that the initial crack toughness and instability toughness of the two kinds of concrete decreased with the increase of temperature; when the strength grade of concrete was C50, the fracture energy first increased and then decreased with the development of temperature; when the strength grade of concrete was C70, the fracture energy first decreased rapidly and then decreased slowly with the development of temperature. |
| format | Article |
| id | doaj-art-c2077fb5f5714df68303e3fdb48e4f70 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-c2077fb5f5714df68303e3fdb48e4f702024-12-02T05:48:17ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-08-011350Experimental Research on Fracture Behavior of Concrete after High TemperaturePeng Qiu0Jiangsu City Vocational College Nantong Campus, ChinaHigh-strength concrete has been widely used in various complex buildings. The fracture and mechanical properties of high-strength concrete after fire have great research value. Based on the double K fracture model, the fracture properties of C50 and C70 strength grade concrete after being processed by high temperature of 25 °C ~800 °C were studied by three-point bending beam test. The changes of fracture toughness Kic and fracture energy at different temperatures after being processed by high temperature were analyzed. The results showed that the initial crack toughness and instability toughness of the two kinds of concrete decreased with the increase of temperature; when the strength grade of concrete was C50, the fracture energy first increased and then decreased with the development of temperature; when the strength grade of concrete was C70, the fracture energy first decreased rapidly and then decreased slowly with the development of temperature.https://www.fracturae.com/index.php/fis/article/view/2467High temperatureConcreteFracture toughnessFracture energy |
| spellingShingle | Peng Qiu Experimental Research on Fracture Behavior of Concrete after High Temperature Fracture and Structural Integrity High temperature Concrete Fracture toughness Fracture energy |
| title | Experimental Research on Fracture Behavior of Concrete after High Temperature |
| title_full | Experimental Research on Fracture Behavior of Concrete after High Temperature |
| title_fullStr | Experimental Research on Fracture Behavior of Concrete after High Temperature |
| title_full_unstemmed | Experimental Research on Fracture Behavior of Concrete after High Temperature |
| title_short | Experimental Research on Fracture Behavior of Concrete after High Temperature |
| title_sort | experimental research on fracture behavior of concrete after high temperature |
| topic | High temperature Concrete Fracture toughness Fracture energy |
| url | https://www.fracturae.com/index.php/fis/article/view/2467 |
| work_keys_str_mv | AT pengqiu experimentalresearchonfracturebehaviorofconcreteafterhightemperature |