Modelling of blast & fragment loading effect
Tan, Kian Peng
Date of Issue2017
School of Civil and Environmental Engineering
The recent trend of terrorism in Southeast Asia region indicates that Singapore may be prone to terrorist attacks. Hence, it is essential for Singapore to protect its infrastructure against such attacks as it will risk the life of the public at large. Although Ministry of Home Affairs (MHA) has recommended guidelines on standoff distance, they are not enforced in all buildings. In past studies, blast loading on a building is a common topic of research. However, in actual fact, not only blast wave damages the building; fragments as well. Due to the wide range of parameters involved in fragment loading, conclusion is still unable to be drawn until today. The distance to the core of the blast loading effect onto the steel column was studied, by means of Finite Element Method (FEM), LS-DYNA. In addition, fragment loading is also considered in this thesis in order to portray a complete scenario of an explosion. The global response shows that close in detonation is the cause of failure to the column while local response indicates that perforation occurs at higher speed. It is said that combination of blast and fragment loadings do have an effect but a complete conclusion is unable to be deduced. Till the day when conclusion is defined against fragment loading, numerical stimulations then can be done on both loadings.
Final Year Project (FYP)
Nanyang Technological University