Experimental Study of Friction Resistance between Steel and Concrete in Prefabricated Composite Beam with High-Strength Frictional Bolt

Table 2

Test results.

Group	Specimen	Final torque (N·m)		(kN)	(kN)	μ
		T 1	T 2
Group 1	S1	100	100	83.3	59.5	0.357	0.377
	S2	102	102	85.0	73.2	0.431
	S3	102	102	85.0	58.4	0.344
Group 2	S4	100	98	82.5	61.6	0.373	0.390
	S5	100	100	83.3	65.2	0.391
	S6	102	100	84.2	68.2	0.405
Group 3	S7	—	—	—	—	—	0.444
	S8	100	100	83.3	74.1	0.445
	S9	100	100	83.3	73.9	0.443
Group 4	S10	100	104	85.0	64.4	0.379	0.420
	S11	102	102	85.0	69.7	0.410
	S12	98	98	81.7	76.8	0.470
Group 5	S13	102	102	85.0	70.8	0.416	0.458
	S14	100	100	83.3	85.6	0.514
	S15	102	102	85.0	75.6	0.445
Group 6	S16	100	100	83.3	54.0	0.324	0.358
	S17	102	100	84.2	60.0	0.356
	S18	102	100	84.2	64.1	0.381
Group 7	S19	100	100	83.3	53.8	0.323	0.285
	S20	100	100	83.3	49.3	0.296
	S21	102	100	84.2	39.3	0.237