Investigation affect of fiber reinforced polymer (FRP) on stress carrying capacity of miter corner joint under diagonal tension loading

OMRANI, PANTEA; Abdolzadeh, Hamideh; Abedi, Mohsen

doi:10.22092/ijwpr.2020.343567.1623

Document Type : Research Paper

Authors

¹ Assistant Prof., Wood Science and Technology Department, The faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran.

² PhD, Department of Wood Science & Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

³ M.Sc., Wood Science and Technology Department, The faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran.

https://doi.org/10.22092/ijwpr.2020.343567.1623

Abstract

Fiber Reinforced Polymer (FRP) has become one of the most popular methods in the reinforced, repair and rehabilitation of structure due to its ease of application and the special physical characteristics. Both destructive and nondestructive assessments have been used to test the characteristics and durability of FRP in order to investigate the condition of the structure. The aim of this research was to investigate the structural performance of corner joint reinforced with fiber reinforced polymer (FRP) composite under diagonal tension load. Constructed joints from two wooden species of beech (Fagus orientalis) and fir (Abies alba), were reinforced with reinforced composites of one and two layer of carbon and glass fibers and then they were tested under diagonal tension load. The miter corner joints were made with wooden pin and polyvinyl acetate adhesive. The fibers lay-up was done manually. Epoxy resin was used as a polymeric matrix. Result of investigation indicated that use of beech wood in comparison with fir exhibited better results. In addition, glass fibers have shown better performance than carbon fiber as reinforcing agents. Inspection of diagonal tension specimens after failure have indicated that using of FRPs on the surfaces of L-shaped miter prevent joint opening, however, failure was occurred at the joint by increasing of load and vertical displacement and the general wood weakness in tension perpendicular to the grain and shear parallel to the grain at dowels site due to stress concentration. Also the results showed that the miter corner joint made with beech species and two layers of glass fibers had the highest stress carrying capacity.

Keywords

20.1001.1.17350913.1399.35.4.1.8

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Investigation affect of fiber reinforced polymer (FRP) on stress carrying capacity of miter corner joint under diagonal tension loading

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Volume 35, Issue 4 - Serial Number 73January 2021Pages 307-320

Volume 35, Issue 4 - Serial Number 73
January 2021
Pages 307-320