Mechanical Properties of Full-Scale Prestressed Concrete Beams with Thin Slab after Exposure to Actual Fire

Table 7

Strain result of tensile side (measuring points 4–6#) under normal loading.

Beam no.	2#	3#	4#	5#
Strain/με	140	163	196	285
Qf (%)	100.	85.9	71.4	49.1
Residual strain/με	0	3	7	17
Relative residual strain (%)	0	1.8	3.6	6