INFLUENCE OF REINFORCEMENT ON WOOD TENSILE STRENGTH SUBMITTED TO WEATHERING

Giovana Gobatto Balanco,Vinicius Borges De Moura Aquino,Túlio Hallak Panzera,André Luis Christoforo,Francisco Antonio Rocco Lahr,Edson Fernando Castanheira Rodrigues

doi:10.1590/1806-908820210000026

Abstract

ABSTRACT Wood is an important building material used in roof structures, bridges, viaducts, and pedestrian bridges. In order to improve its use, as well as rehabilitate structural parts deteriorated by weathering, reinforcement of beams and columns with composite material is performed. Given the climate action on structures, it is important to know the influence and behavior of wood and composite material when subjected to weathering. This study aimed to evaluate the influence of the reinforcement of CCB-treated wood with carbon fiber reinforced polymer (CFRP) and subjected to artificial weathering on its tensile strength parallel to the fibers. The results showed a 30% reduction in strength due to weathering and a 25% increase in tensile strength, showing the positive influence of reinforcement even under artificial weathering conditions

Highlights

Wood is an important material for many applications, which is used in construction, furniture, sport equipment and musical instruments
This study aimed to evaluate the influence of the reinforcement of CCB-treated wood with carbon fiber reinforced polymer (CFRP) and subjected to artificial weathering on its tensile strength parallel to the fibers
Objectifying a better understanding of weathering influence on tensile strength of CCB-treated wood reinforced with carbon fiber reinforced polymer (CFRP), this study aimed to analyse the effect of carbon fiber composite on the tensile strength of wooden beams exposed to artificial weathering

Summary

Introduction

Wood is an important material for many applications, which is used in construction, furniture, sport equipment and musical instruments. It has a good ratio between mechanical strength and density, besides being natural, renewable and abundant in Brazil (Adamopoulos and Passialis, 2010; Beech, 2017; Viluma, 2017; Rodrigues and Christoforo, 2019). Considering the use of wood in civil construction, it can be employed in roof elements, anchors, structures of reinforced and prestressed concrete, sleepers (railways), works of art as in bridge structures, viaducts and walkways, storage structures (silos), among others (O’Born, 2018; Ramage, 2016; Almeida, 2018). The studies found out values of tensile strength parallel to the grain [ft0] of 58 MPa and 45 MPa (Dias and Lahr, 2004; Lahr et al, 2016)

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