Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire
Due to the flammability of materials and the vastness of space, flashover fires of large-space timber structures pose a huge threat to lives as well as the structures themselves. Therefore, it is necessary to study the critical conditions, control factors and prediction methods of flashover fires. T...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/19/5515 |
| _version_ | 1797516157647847424 |
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| author | Yongwang Zhang Lu Wang |
| author_facet | Yongwang Zhang Lu Wang |
| author_sort | Yongwang Zhang |
| collection | DOAJ |
| description | Due to the flammability of materials and the vastness of space, flashover fires of large-space timber structures pose a huge threat to lives as well as the structures themselves. Therefore, it is necessary to study the critical conditions, control factors and prediction methods of flashover fires. To address this issue, hundreds of design conditions were simulated by Fire Dynamics Simulator (FDS) with variations in space size, the heat release rate (HRR) of fire source and fire growth type. A temperature–time model of the maximum temperature of the smoke layer near the ceiling (<i>T<sub>max</sub></i>) was established, and the critical condition that uses this model to predict the occurrence of flashover was determined. Furthermore, a mathematical formula was established that can accurately predict the flashover induction time when the <i>T<sub>max</sub></i> exceeds 400 °C. This research can provide a reference for the performance-based fire safety design of large-space timber structures. |
| first_indexed | 2024-03-10T06:57:21Z |
| format | Article |
| id | doaj.art-cf764d0d3df44eeca8943031be9cef61 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:57:21Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-cf764d0d3df44eeca8943031be9cef612023-11-22T16:23:01ZengMDPI AGMaterials1996-19442021-09-011419551510.3390/ma14195515Research on Flashover Prediction Method of Large-Space Timber Structures in a FireYongwang Zhang0Lu Wang1School of Civil Engineering, Southeast University, Nanjing 210096, ChinaCollege of Civil Engineering, Nanjing Tech University, Nanjing 211816, ChinaDue to the flammability of materials and the vastness of space, flashover fires of large-space timber structures pose a huge threat to lives as well as the structures themselves. Therefore, it is necessary to study the critical conditions, control factors and prediction methods of flashover fires. To address this issue, hundreds of design conditions were simulated by Fire Dynamics Simulator (FDS) with variations in space size, the heat release rate (HRR) of fire source and fire growth type. A temperature–time model of the maximum temperature of the smoke layer near the ceiling (<i>T<sub>max</sub></i>) was established, and the critical condition that uses this model to predict the occurrence of flashover was determined. Furthermore, a mathematical formula was established that can accurately predict the flashover induction time when the <i>T<sub>max</sub></i> exceeds 400 °C. This research can provide a reference for the performance-based fire safety design of large-space timber structures.https://www.mdpi.com/1996-1944/14/19/5515large-space timber structuresflashover firesflashover induction timeflashover critical conditionflashover prediction |
| spellingShingle | Yongwang Zhang Lu Wang Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire Materials large-space timber structures flashover fires flashover induction time flashover critical condition flashover prediction |
| title | Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire |
| title_full | Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire |
| title_fullStr | Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire |
| title_full_unstemmed | Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire |
| title_short | Research on Flashover Prediction Method of Large-Space Timber Structures in a Fire |
| title_sort | research on flashover prediction method of large space timber structures in a fire |
| topic | large-space timber structures flashover fires flashover induction time flashover critical condition flashover prediction |
| url | https://www.mdpi.com/1996-1944/14/19/5515 |
| work_keys_str_mv | AT yongwangzhang researchonflashoverpredictionmethodoflargespacetimberstructuresinafire AT luwang researchonflashoverpredictionmethodoflargespacetimberstructuresinafire |