BEHAVIOR OF TUNNEL WITH CONCRETE LINING SUBJECTED TO UNDERGROUND EXPLOSION IN ROCK MEDIA | ||||
| The International Conference on Civil and Architecture Engineering | ||||
| Article 9, Volume 7, 7th International Conference on Civil and Architecture Engineering, May 2008, Page 135-147 PDF (832.39 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iccae.2008.45419 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| ISMAIL MOHAMED KAMAL | ||||
| Permanent staff (PhD) – Civil Eng. Department, Military Technical Collage – Cairo, EGYPT. | ||||
| Abstract | ||||
| In this study, a circular cross-section tunnel with concrete lining is analyzed by the finite element code AUTODYN 3-D version 4.3., which is probably the most extensive code dealing with explosive loads in the world. First, a model calibration was performed for the AUTODYN finite element parameters and material models by using a field test problem with available field measurements. Then, based on the calibration results, a parametric study has been performed by means of finite element non-linear dynamic analysis to investigate the effect of underground explosion on the behaviour of circular tunnel with concrete lining in rock media. A charge of 2500 kg TNT was used as an explosive load. This charge was located at 3.25m-bellow ground surface with two crown-detonation distances 10 and 15m for all models. Finally, a non-linear rational analysis is conducted for the parametric study results to develop simple equations to determine peak displacements and strains for circular tunnels with concrete lining. These equations may help tunnel designers and military engineers in estimating displacements, and strains, then overall damage in the tunnels with no need to deal with complex finite element non-linear dynamic codes. | ||||
| Keywords | ||||
| Finite Element; Underground Explosion; Circular Tunnel; Rock Media; Concrete Lining | ||||
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