# Analysis of Fire Resistance of Prestressed Concrete T-Beam Based on ABAQUS Numerical Simulation
###### Abstract  
The analytical fire resistance calculations were carried out on 57 prestressed concrete T-beam models using the finite element software ABAQUS. The effects of different fire modes, different concrete strengths, different flange plate thicknesses, different ratios of the prestressing bar, and different concrete protection layer thicknesses were investigated in three cases with load ratios of \(n=0.4\), \(n=0.6\), and \(n=0.8\). The fire resistance of prestressed concrete T-beams shows a large variability under different fire modes. The fire mode significantly affects the fire resistance of the structure and should be given more consideration in the subsequent fire resistance design of the structure. The configuration of prestressing bars will significantly increase the fire resistance of concrete T-beams, while the thickness of the concrete protective layer and the concrete strength will significantly affect the fire resistance of prestressed concrete T-beams. Therefore, the fire resistance can be improved by adding prestressing bars, increasing the concrete strength, and increasing the thickness of the protective layer in the design. Finally, a fitting equation for fire resistance of the prestressed concrete T-beams based on the finite element model calculation data was created. The equation has good prediction accuracy and can provide a reference for the fire resistance design of prestressed concrete T-beams. p 2023 13 4683 14 February 2023 2023 2023 2023 2023 2023 2023  
field of reinforced concrete beams during a fire to determine its distribution pattern at different moments of fire resistance. In the heating section, the temperature field of continuous beam sections showed a laminar distribution pattern of high external temperature and low internal temperature. In the cooling section, the temperature field showed a circle distribution pattern of low external and high internal temperatures. [PERSON] et al. [6] proposed a method to assess the fire resistance of reinforced concrete beams by investigating the different parameters influencing the fire resistance of reinforced concrete beams, pointing out that fire conditions can significantly affect the fire resistance of reinforced concrete. [PERSON] et al. [7] carried out a comparative study of the flexural properties of reinforced concrete beams at room temperature and after the fire. Two reinforced concrete beams were subjected to static load tests at room temperature, and three reinforced concrete beams were subjected to fire for 30 min, 60 min, and 90 min, according to the ISO 834 heating curve, and then naturally cooled to room temperature before being subjected to static load tests. The study showed that the flexural properties of the reinforced concrete beams decreased parabolically with increasing fire time. The results of the temperature field of the elevated section and the post-fire flexural properties obtained by finite element simulation are in good agreement with the experimental results. They can be used to research and analyze reinforced concrete beams after the fire. Although research on the fire resistance of reinforced concrete beams is relatively well established, the fire resistance of prestressed concrete beams exhibits significant differences from that of reinforced concrete beams due to the incorporation of prestressing bars [8]. Therefore, research on the fire resistance of prestressed concrete beams needs to be initiated. Some scholars have researched the fire resistance of prestressed concrete structures, but at present, it is mainly concerning prestressed concrete rectangular beams. [PERSON] et al. [9] carried out an experimental study on the force performance of 26 prestressed concrete beams at high temperatures, and explored the effects of load level, concrete protective layer thickness, and ratio of prestressing bar on their fire resistance performance at high temperatures.