Structural Glass Systems under Fire: Overview of Design Issues, Experimental Research, and Developments

Table 3

Summary of bending test results reported in [22].

Specimen	Paint	Failure time (min)	Failure mode	Tmax (°C)	Notes
A	No	>30	I	250	—
	No	2.4	BR	250	—
	Yes	19	BR	250	Beneficial effect of intumescent paint
B	No	>40	I	300	—
	Yes	>40	I	300	—
C	No	>30	PC evaporation	n.a.	Central 10 cm evaporated; no delamination at the beam ends
	Yes	>30	PC evaporation	n.a.	Central 7 cm evaporated; no delamination at the beam ends; beneficial effect of intumescent paint
D	No	1.45	C	n.a.	Premature failure of the adhesive layer between glass segments, with subsequent delamination, dislodgement of segments, and buckling
	Yes	4.1	C	n.a.	Beneficial effect of intumescent paint, but similar failure mechanism
E	No	>30	PC melting	n.a.	Significant thermal damage; central 7 cm PC melted (visible after 5 min)
	Yes	>39	PC melting	n.a.	Beneficial effect of intumescent paint, even with significant thermal damage; central 7 cm PC melted (visible after 10 min)

Mechanical load included; I = integer beam; BR = broken; C = cohesive failure between glass segments and PC foils; T_max = maximum temperature monitored on the beam backside, at the end of the experiment; n.a. = not available.