Long-Term Loading Test of Reinforced Glulam Beam

Due to creep characteristics of wood, long-term loading can cause a significant stress loss steel bars in reinforced glulam beams and high deflection the beam midspan. In this study, 15 were subjected 90-day test, effects value, reinforcement ratio prestress level on bars, midspan deflection, other parameters compared analyzed. The main conclusions drawn from study that accounted for 22.5%, 20.6%, 18.2% total respectively when value was 20%, 30%, 40% estimated ultimate load under loading. higher was, smaller proportion was. Compared with ordinary beams, even smaller. Under condition constant level, decreased by 17.5%, 13.6%, 9.1%, 26.9%, 24.2%, 20.6% 2.05%, 2.68 %, 3.39%. With increase ratio, decreased, as well. When conditions remained 0 MPa, 30 60 9.4%, 10.2%, respectively, 26.1%, 64.9%, respectively. increased, increased