In order to thoroughly understand the fire performance such as residual bearing capacity

mid-span displacement and failure mode of prestressed concrete hollow-core slabs exposed to fire

six specimens including three comparative slabs and three experimental slabs were experimentally studied.The three experimental slabs were exposed to fire for 23min

38min and 53min

respectively.During the exposed process

the mid-span displacement of slabs increased with the fire duration

and most of the displacement gradually recovered after cooling by air.Static load test results on the six specimens showed that the failure modes of the comparative slabs and the experimental slabs were all bending failure.The cracking load and ultimate load of the experimental slabs decreased obviously

and the ultimate load had a linear relationship with fire duration.Additionally

the initial bending stiffness of the experimental slabs decreased significantly compared to that of experimental slabs.The tensile strain on bottom surface and the compressive strain on top surface of the experimental slabs were all larger than those of the comparative slabs at the same load level.