Fire resistance of two full-scale PSRC simply supported beams was tested under high temperature and vertical load.The distribution of temperature field

vertical deformation characteristics and bearing performance deterioration process were obtained in the experiment

and the relationship between prepressure caused by prestressed bar and heating time was measured during the heating process by setting a pressure sensor at the beam end.The result shows that pre-pressure caused by prestressed bar is sensitive to high temperature

and it is reduced to half of its initial value after 100 minutes in ISO834 standard fire. At the end of the test

lateral bending deformation appeares in specimen F-PSRCB13.