Bending Performance of Prestressed Continuous Glulam Beams

The limited transferring moment capability of Glulam (glued laminated wood) joints results in insufficient joint stiffness. Therefore, most the connections are hinged joints. Based on previous studies, one novel end-connection device was proposed to form prestressed continuous beams. beams were composed low-relaxation steel bars, deviator block, anchorage device, and apparatus. These bars tensioned by block exert prestress. Then, 18 two simply supported subject bending tests explore impact reinforcement ratio prestress from aspects such as failure modes, bearing capacity, load-deflection relationship, load-strain relationship. show that, given same level, compared with a 1.92%, capacity 3.84% 5.76% is increased 20.3%–29.4% 30.51%–36.36%, respectively. Given ratios, without prestressing, prestressing force 7 kN 14 2.39%–10.14% 6.49%–13.26%, In addition, beams, 40%, deformation reduced 13%. beam, performance can be improved effectively.