Behavior of 3D Ultra High Performance Fiber Reinforced Concrete Frame Structure Under Seismic Load with Soil Model in Vietnam

In the past, Vietnam lacked a national code for designing construction subjected to earthquakes. The initial seismic code, referencing Eurocode 8, was not introduced until 2006. However, the absence of historical earthquake data, especially in large cities, given a significant challenge in designing structures under seismic loads. This paper investigates the structural behavior and performance assessment of utilizing Ultra High Performance Fiber Reinforced Concrete (UHPFRC), a relatively novel material in Vietnam, for multi-story buildings under earthquake conditions. A three-dimensional (3D) model of the five-story building subjected to earthquake, taking into account of actual geological conditions of Vietnam, using a soil-structure interaction model, was calculated. The ground acceleration data were selected from the 2001 Dien Bien earthquake, which occurred in the highly seismic zone of the northwest area of Vietnam. The results of the numerical analysis are also compared to High Strength Concrete material to highlight the loading capacity of the UHPFRC frame structure under seismic loads. From the study, it is recommended that UHPFRC is a potential material in Vietnamese construction conditions to ensure safety against earthquakes.