Effect of the Nonprestressed/Prestressed BFRP Bar on Flexural Performance of the Bamboo Beam

Table 5

Positions of neutral axis under different loads in the second series.

Load (kN)	B0		B1		B2
	hl (mm)	hl/h	hl (mm)	hl/h	hl (mm)	hl/h
5	65.49	0.543	55.08	0.490	56.53	0.499
10	63.71	0.528	54.87	0.488	56.57	0.499
25	62.69	0.519	53.63	0.477	55.57	0.490
35	59.98	0.497	49.73	0.442	51.52	0.454
45 (40)	55.82	0.462	47.96	0.426	47.23	0.416
Pu	53.61	0.444	46.92	0.417	47.91	0.422

Note: the number in the brackets is for the specimen B1; P_u is the ultimate load.