Fengky Satria Yoresta, Shogo Higuchi, Annisa Prita Melinda, Yosuke Yamazaki, Phan Viet Nhut, Yukihiro Matsumoto
This paper presented an investigation on the performance of glued laminated timber (glulam) beams strengthened using CFRP plates mounted near the compression surface, or further named as near compression surface mounted CFRP (NCSM-CFRP). A total of eight specimens of glulam beams, 80 x 120 mm, comprising six strengthened beams and two unstrengthened control beams as reference, were tested to failure in a four-point bending scheme. The strengthened beams were varied in terms of depth, length, and number of CFRP plates. The test results confirmed that bending stiffness of the beam increased in the range of 19–56 %. However, modulus of rupture (MOR) and energy absorption capacity of the beams decreased compared to the average values of the control beams. In general, failure modes of the beams did not change from flexural tensile failure. The presence of CFRP plates only reduced, or even eliminated, the degree of plastification of the beams in compression zone. An analytical model was proposed, taking into account the contribution of CFRP plates, to predict elastic deflection and ultimate moment capacity of the beams. It was shown that the predicted results were in good agreement with the experimental results. © 2025 Institution of Structural Engineers
Department of Architecture and Civil Engineering, Toyohashi University of Technology, Aichi, Toyohashi, 441-8580, Japan; IPB University, Kampus IPB Dramaga Bogor, West Java, 16680, Indonesia; Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Padang, West Sumatera, 25713, Indonesia; The University of Danang − University of Technology and Education, Da Nang, Viet Nam; Institute of Environmental Systems Science, Shimane University, 1060 Nishikawatsu-cho, Shimane, Matsue, 690-8504, Japan
