Experimental and Numerical Studies on the Negative Flexural Behavior of Steel-UHPC Composite Beams

Table 4

Main test results.

State	Test beam	Load (kN)	Displacement (mm)	Rotation (°)	Crack width (mm)	Strain of UHPC top surface (µε)	Strain of top flange of steel girder (µε)
Critical cracking state	CB-1	9.0	4	0.14	0.05	1453	269
	CB-2	16.6	6.5	0.23	0.05	1516	231
	CB-3	32.1	7	0.25	0.05	1774	206
Final state	CB-1	35.3	30	1.07	1.03	5750	1453
	CB-2	42.3	30	1.07	0.92	5152	1114
	CB-3	59.0	30	1.07	0.51	4813	863