Using different mitigation materials to increase the resistance of underground concrete structure subjected to b last loads | ||||
The International Conference on Civil and Architecture Engineering | ||||
Article 36, Volume 9, 9th International Conference on Civil and Architecture Engineering, May 2012, Page 1-12 PDF (1.37 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/iccae.2012.44357 | ||||
View on SCiNiTO | ||||
Authors | ||||
Z. Z. Selema1; H. M. Farag2; S. Y. Mahfoz3; S. A. Mazek3 | ||||
1Post graduate student: Civil Engineering Department, Military Technical College, Cairo, Egypt. | ||||
2Ph. D. Lecturer: Civil Engineering Department, Military Technical College, Cairo, Egypt. | ||||
3Assistance Professor: Civil Engineering Department, Military Technical College, Cairo, Egypt. | ||||
Abstract | ||||
Abstract In the last decades; the mass destructive weapons had been widely used like nuclear weapons. Nuclear bombs are destructive tool for human, weapons, equipment and all facilities. The development of the nuclear bomb is a challenge for civil engineer s to protect people, facilities and weapons against hazards of nuclear explosions. That led them to use the protective structures in military and civilian applications like underground concrete structures. It is difficult and sophisticated to use experimental nuclear test to predict behavior of buried concrete structure response. The present paper presents a study to understand the behavior of underground concrete structure box section under blast load. Blast load resulted from a 2.0 kt (kiloton) "weapon yield" explodes at 200 m horizontal distance from the concrete structure , while the "weapon yield" is the measure of nuclear weapon, usually in kilotons or megatons of TNT equivalent . Numerical models were conducted using a 3-D nonlinear finite element program (AUTODYN). For saving time, an equivalent weapon yield of 0.03125 kt explodes at 50 m range after ensuring that the pressure resulted is the same, using the well known "Scaling Law" R/R1=(W/W1)⅓ , where R and R1 are the ranges of charges W and W1 respectively. Different mitigation material; half pyramid sandwich panel, honeycomb sandwich panel and aluminum foam were used to increase the resistance of underground concrete structure. This paper proposed also the best thickness of half pyramid sandwich panel under pressure ranges between 345 kpa to 1172 kpa (50 psi to 170 psi) namely 345, 552,758, 965 and 1172 kpa. | ||||
Keywords | ||||
Underground concrete structure; 3D nonlinear finite element analysis; blast wave; honeycomb sandwich panel; half pyramid sandwich panel; Aluminum Foam | ||||
Statistics Article View: 80 PDF Download: 127 |
||||