APPLICATION OF FLEXURAL REINFORCEMENT WITH CFRP ON FINGER-JOINTED LAMINATED TIMBER BEAMS

Nurhayati, Lilis and Dewi, Sri Murni and Wisnumurti, Wisnumurti and Nuralinah, Devi (2026) APPLICATION OF FLEXURAL REINFORCEMENT WITH CFRP ON FINGER-JOINTED LAMINATED TIMBER BEAMS. EUREKA: Physics and Engineering, 1 (1). pp. 168-180. ISSN 2461-4254

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Abstract

The increasing demand for sustainable construction materials has driven the use of engineered wood products, particularly finger-jointed glued laminated timber (glulam). This study evaluates the mechanical performance of finger-jointed glulam beams made from Merbau hardwood waste, reinforced with carbon fiber reinforced polymer (CFRP). A four-point bending test was conducted according to ASTM D198-02 to determine the flexural strength, stiffness, and failure behavior of different CFRP reinforcement configurations. The results indicate that CFRP reinforcement significantly enhances the load-bearing capacity, maximum bending moment, and mid-span deflection of finger-jointed glulam beams. The face-butt joint with short CFRP U-reinforcement increased load capacity by 38%, whereas the face-finger joint with long CFRP U-reinforcement exhibited a 102% improvement. The study also reveals that CFRP reinforcement enhances the modulus of rupture (MOR), particularly in the long U-configuration, where an increase of 101.05% was observed. However, the modulus of elasticity (MOE) did not always show consistent improvement, suggesting that reinforcement efficiency is influenced by joint orientation and bonding characteristics. Failure analysis indicates that CFRP significantly alters the fracture mode, reducing brittle failure at the finger joints and improving overall structural resilience. The analysis of hardwood glulam finger-joint provides insights into its mechanical behavior and structural feasibility. These findings confirm the effectiveness of CFRP as a strengthening material for finger-jointed glulam beams, making them a viable alternative to traditional construction materials. Further studies are needed to optimize reinforcement configurations and evaluate long-term performance.

Item Type:	Article
Uncontrolled Keywords:	finger-jointed glulam, Merbau wood waste, CFRP reinforcement, modulus of rupture
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management T Technology > T Technology (General)
Divisions:	Fakultas Teknik > Prodi Teknik Industri
Depositing User:	Lilis Nurhayati
Date Deposited:	25 Feb 2026 08:37
Last Modified:	25 Feb 2026 08:37
URI:	http://repositori.ukdc.ac.id/id/eprint/2564

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