Analyses on Prestress Loss and Flexural Performance of the Laminated Bamboo Beam Applied with Prestressed BFRP Sheet

Table 6

Details of tested laminated bamboo beams applied with prestressed BFRP sheet.

Specimen label	b × h × l (mm)	l0 (mm)	F0 (kN)	bf (mm)	σ0 (MPa)	σpe (MPa)	ω′ (mm)
B-1	50 × 150 × 3000	2700	0	51.3	0	0	0
B-2	50 × 150 × 2978	2700	12.54	51.9	821.8	641.0	3.04
B-3	50 × 150 × 3000	2700	12.54	51.1	836.7	652.6	3.53

Note. l₀ is the distance between two supports; F₀ is the actual applied prestressed force; b_f is width of o BFRP sheet; σ₀ is the initial prestressed stress of the BFRP sheet, which is recognized as the target initial prestressed stress, σ_con; σ_pe is the effective prestress based on equation (4); ω′ is the measured initial deflection caused by the initial prestressed force after release of the BFRP sheet.