Response study of concrete gravity dam against aircraft crash

1st International Conference on Contemporary Research in Mechanical Engineering with Focus on Materials and Manufacturing

机械制造;材料科学

Sadique, M.R.^1 ; Ansari, M.I.^1 ; Athar, M.F.^1

Department of Civil Engineering, Aligarh Muslim University, Aligarh, India^1

关键词: Aircraft crash;    Concrete gravity dams;    Critical structures;    Damaged plasticities;    Mega-structure;    Safety concerns;    Terror attacks;    Upstream face;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/404/1/012027/pdf
DOI  :  10.1088/1757-899X/404/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Concrete gravity dam is considered as acritically important mega structure and lifeline of countries with rich water resources. Its failure due to natural and manmade hazard may cause a huge loss of human life and economy. The recent terror attacks involving intentionally crash of aircrafts have raised the safety concern of these critical structures. In the present study, a finite element analysis has been carried out to analyse the behaviour of concrete gravity dams against possible aircraft crash. Reaction-time curve of fighter jet Phantom F4 has been applied on the crest of the dam from upstream face. The Concrete Damaged Plasticity model has been incorporated to predict the behaviour of concrete under high strain loading. It has been found that at a crash speed of Mach 1, fighter jet had caused severe damage to dam. Although the penetration will be small on the loading face of the dam due to massiveness of structure, however, the concrete around crest and neck will fail in tension. Further, redistribution of moments will cause failure of the structure. Maximum deformation has been found to be 8.8 mm. Stresses are quite high at the impact face, however it diminishes at a depth of 8 m from the impact face.