Experiment and analysis on temperature distribution of prestressed concrete beams and slabs

Experiments on fire resistances performance of 14 unbonded and 1 bonded prestressed concrete simple slabs, 9 two-span unbonded prestressed concrete continuous slabs and 9 two-span bonded prestressed concrete continuous beams are completed. Temperature distribution was tested by 117 thermocouples distributed in concrete and surface of reinforcements. Time-temperature curve of 117 test points were calculated by ANSYS software, calculation value and test value are in good agreement. On the basis of test results, convective heat transfer coefficient, equivalent emissivity coefficient of heat radiation, thermal conductivity parameter of concrete and specific heat were determined through calculation. All these provide basic material for research on fire performance of prestressed concrete beams and slabs subjected to fire.