Dynamic Analysis Of The UHPFRC High-rise Building Under High Explosion Using Coupled Eulerian-Lagrangian Approach

The scarcity of available land in major cities has recently generated a considerable increase in the construction of tall buildings. Consequently, the study of high-rise buildings under blast or impact loading, resulting from accidental or intentional actions, has become essential. The understanding regarding the way high-rise buildings respond to such conditions remains limited owing to the complexity involved with the nonlinear behavior of materials and the overall response of three-dimensional structures. It is almost impossible to conduct a comprehensive test on a high-rise structure that is subjected to an explosion. However, the remarkable capabilities of advanced software enable researchers to simulate the response of complex structures, such as high-rise buildings, under extreme blast loading. In this study, a 12-floor building subjected to high explosion is analyzed using a coupled analysis that incorporates an erosion algorithm with the Lagrange formulation for solid materials and the Eulerian formulation for the gas medium. Blast loading analysis, the nonlinear behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC), and the reaction of high-rise structures to blast occurrences are some of the key structural engineering issues that are addressed in the research. The main contribution of this study is to increase the understanding of the way blasts behave in complex structures and promote the use of UHPFRC concrete-filled steel columns to increase high-rise buildings’ blast resistance. © The Author(’s).