Mechanical Behavior of High-Strength Bolted Joints Fabricated from Fire-Resistant Steel at Elevated Temperatures

Table 4

Experimental condition and parameters of the specimens.

Specimen number	Temperature	Treatment of friction surface	Type of high-strength bolts (Grade 10.9 M20)	Specimen quantity
A1	Room temperature (20°C)	Impeller blasting	Fire resistant	2
A2			Ordinary	2
A3		Sprayed hard quartz sand	Fire resistant	2
A4			Ordinary	2
B1	200°C	Impeller blasting	Fire resistant	2
B2			Ordinary	2
B3		Sprayed hard quartz sand	Fire resistant	2
B4			Ordinary	2
C1	400°C	Impeller blasting	Fire resistant	2
C2			Ordinary	2
C3		Sprayed hard quartz sand	Fire resistant	2
C4			Ordinary	2
D1	600°C	Impeller blasting	Fire resistant	2
D2			Ordinary	2
D3		Sprayed hard quartz sand	Fire resistant	2
D4			Ordinary	2
E1	700°C	Impeller blasting	Fire resistant	2
E2			Ordinary	2
E3		Sprayed hard quartz sand	Fire resistant	2
E4			Ordinary	2