Abstract
With specific force transmission characteristics and flexible shaping capability, glulam components have been extensively used in long-span and multi-storey composite timber architectures. In this study, we propose a hollow glulam beam design with stiffening plates in a hollow rectangular cross section with high flexural behaviour and stability. To improve the bearing capacity, bottom of the beam was reinforced with fibre reinforced polymer. The flexural behaviour of the beam was analysed using experimental study, theoretical research, and finite element analysis. The results indicate that the bearing capacity of reinforced glulam beams improves marginally, and the reinforcement effect of carbon fibre reinforced polymer (CFRP) is better than that of basalt fibre reinforced polymer (BFRP). For stiffened hollow glulam beams in group ZR1 and ZR2, the ultimate bearing capacity increases after reinforcement with CFRP and BFRP. In this study, the experimental data were obtained by a four-point bending test, and the finite element model was established for verification. Additionally, an elastic theoretical calculation method is established for strengthening the bearing capacity of specimens and is validated via results of numerical simulation and testing.
Published Version
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