Numerical analysis of underground tunnels subjected to surface blast loads
The increased terrorist attacks on important public structures and utilities have raised the vital necessity for the investigation of performance of structures under blast loads to improve the design and enhance the behavior of structures subjected to such threats. In this study, 3-D finite element a...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2020-12-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2890 |
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| author | Mahmoud Nawar Alaa Ata Marwa Nabil Sally Hassan |
| author_facet | Mahmoud Nawar Alaa Ata Marwa Nabil Sally Hassan |
| author_sort | Mahmoud Nawar |
| collection | DOAJ |
| description | The increased terrorist attacks on important public structures and utilities have raised the vital necessity for the investigation of performance of structures under blast loads to improve the design and enhance the behavior of structures subjected to such threats. In this study, 3-D finite element analysis is used to study the effect of surface explosions on the response of RC bored tunnels. The soil behavior is modelled using Drucker-Prager Cap model. Two types of soil are investigated, and the blast load is considered through various weights of TNT explosive charges at heights of 0.50 m and 1.0 m from ground surface. To study the effect of horizontal standoff distance, six different horizontal distances are considered. The results show that the soil type has a significance effect on tunnel response due to surface blasts. Also the weight and the location of charge have a great effect on the safety of the tunnel. Finally, a parametric study is established to define the borders of the restricted area around the tunnel location to be safe. |
| format | Article |
| id | doaj-art-ffec5028afb846fbaecbde396cb6dd72 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-ffec5028afb846fbaecbde396cb6dd722025-01-03T00:27:05ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932020-12-01155510.3221/IGF-ESIS.55.12Numerical analysis of underground tunnels subjected to surface blast loadsMahmoud Nawar0Alaa Ata1Marwa Nabil2Sally Hassan3Zagazig University, Department of Structural Engineering, Egypt University of Hertfordshire-Hosted by GAF, School of Engineering and Computer Science, Egypt.Zagazig University, Department of Structural Engineering, Egypt Zagazig University, Department of Structural Engineering, Egypt The increased terrorist attacks on important public structures and utilities have raised the vital necessity for the investigation of performance of structures under blast loads to improve the design and enhance the behavior of structures subjected to such threats. In this study, 3-D finite element analysis is used to study the effect of surface explosions on the response of RC bored tunnels. The soil behavior is modelled using Drucker-Prager Cap model. Two types of soil are investigated, and the blast load is considered through various weights of TNT explosive charges at heights of 0.50 m and 1.0 m from ground surface. To study the effect of horizontal standoff distance, six different horizontal distances are considered. The results show that the soil type has a significance effect on tunnel response due to surface blasts. Also the weight and the location of charge have a great effect on the safety of the tunnel. Finally, a parametric study is established to define the borders of the restricted area around the tunnel location to be safe.https://www.fracturae.com/index.php/fis/article/view/2890Finite element analysisTNTRC tunnelDrucker Prager Cap Model |
| spellingShingle | Mahmoud Nawar Alaa Ata Marwa Nabil Sally Hassan Numerical analysis of underground tunnels subjected to surface blast loads Fracture and Structural Integrity Finite element analysis TNT RC tunnel Drucker Prager Cap Model |
| title | Numerical analysis of underground tunnels subjected to surface blast loads |
| title_full | Numerical analysis of underground tunnels subjected to surface blast loads |
| title_fullStr | Numerical analysis of underground tunnels subjected to surface blast loads |
| title_full_unstemmed | Numerical analysis of underground tunnels subjected to surface blast loads |
| title_short | Numerical analysis of underground tunnels subjected to surface blast loads |
| title_sort | numerical analysis of underground tunnels subjected to surface blast loads |
| topic | Finite element analysis TNT RC tunnel Drucker Prager Cap Model |
| url | https://www.fracturae.com/index.php/fis/article/view/2890 |
| work_keys_str_mv | AT mahmoudnawar numericalanalysisofundergroundtunnelssubjectedtosurfaceblastloads AT alaaata numericalanalysisofundergroundtunnelssubjectedtosurfaceblastloads AT marwanabil numericalanalysisofundergroundtunnelssubjectedtosurfaceblastloads AT sallyhassan numericalanalysisofundergroundtunnelssubjectedtosurfaceblastloads |