Flexural Behavior of Slab-Rib Integrated Bridge Decks with GFRP Skin and Polyurethane Foam Core

Table 3

Summary of test matrix and results.

Specimen	P (kN)	P1(kN)	P1/P	δ1 (mm)	δ2 (mm)	δ2/δ1
S2D	34.35	31.64	0.92	26.55	24.95	0.94
S4D	68.66	72.84	1.06	33.27	31.08	0.83
S6D	107.70	109.01	1.01	33.79	29.73	0.88
S4d	91.15	87.67	0.96	38.95	35.26	0.91
S4DV	109.25	117.18	1.07	38.89	34.53	0.89
S4DH	68.73	71.23	1.04	31.46	27.15	0.86
S4DVH	115.61	121.05	1.05	45.68	39.96	0.88
S4DT2	87.19	92.23	1.06	38.52	—	—
S4DT3	65.56	70.64	1.08	29.80	—	—

In the first column, the letters d and D mean the densities of synthetic foams are 100 kg/m3 and 150 kg/m3, respectively, the letters V and H mean the specimens have vertical and horizontal webs, the letter T means the specimens have cross beams, the first number means the number of FRP layers of the GFRP skins, and the numbers 2 and 3 mean the number of cross beams, respectively. In the first row, P is the tested ultimate load, and P₁ is the ultimate load obtained from FE model; δ1 is the tested maximum deformation, and δ2 is the calculated deformation from equation (17).