I would like to thank Mr. Vincent Heng Hiang Kim for sharing his vast experience in conducting unsaturated soil tests using the modified triaxial apparatus. The prompt assistance given by other geotechnical laboratory staff, CEE, NTU, especially Mr. Tan Hiap Guan Eugene, is also appreciated. I would like to express my love and gratitude to my parents for their constant encouragement throughout my life. Thanks to my wife and my son for their love, understanding and constant encouragement throughout my study, even thought I have been way from them for a long time. Finally, I would like to acknowledge the financial support provided by Nanyang Technological University in the form of a research scholarship. Acknowledgements also go to my friends who have assisted me in this research programme.
This paper presents a fracture behavior modeling of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) slabs under contact blast loading using the finite element method. The UHPFRC is supposed to be brittle material and follow the Johnson–Holmquist-II(JH-2) model. The steel rebar is modeled using the elasto-plastic model. The Emulsion Explosive has been used and modeled by the SPH method. UHPFRC slabs with the dimensions 1000mm of length, 800mm of width and 120mm of thickness is considered. The steel fibers with a volume fraction of 2% is used. The UHPFRC material is fabricated in laboratory using the material available in Vietnam. The concrete crater and spall damage of UHPFRC slab under contact blast loading are considered. The numerical results are compared with experiment. These results allow to evaluate the resistance against blast load of UHPFRC fabricated in lab.
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