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Research Article Open access CC BY 4.0

Behavior of Shear Connectors Formed by Bonded-in “X” Type Steel Bars in Wood-Concrete Specimens

Julio César Pigozzo, Felipe Nascimento Arroyo, André Luis Christoforo, Diego Henrique de Almeida, Carlito Calil Junior, Francisco Antonio Rocco Lahr

Current Journal of Applied Science and Technology · pp. 1–8 · Published 1 Aug 2018

10.9734/CJAST/2018/43127

Abstract

In Brazil, don’t have a standard code which rules the shear connector tests for mixed wood-concrete structures. Due to the excellent connector diversification, regarding shape, stiffness, limit strength and the placement in the structural member; and variables as: spaces between connectors, spaces between connectors and the member ends of wood or concrete, dimension variation and mechanical properties of the materials involved, besides the rate and reinforced grid disposition in the concrete members, several normative documents suggest that wood-concrete specimens represent the real connection behavior. In this work, were used a push-out type specimen to characterize the connectors formed by bonded-in steel bars in “X” type behaviour, with a 45º between steel bars and wood grain. In this work, were used: Corymbia citriodora wood specie, without surface treatment; Threaded surface steel bars (CA-50 steel); and reinforced concrete of medium strength. Steel bars were bonded in the wood with epoxy resin Sikadur32 fluid and anchorage in the concrete by adherence. In each steel bar, in the axial direction and in the shear plan surface, two electric extensometers were fixed in opposed points. Results present the steel bar anchorage behaviour, force distributions in the steel bars, as well as the rupture model and mechanism and the procedures to obtain the connection sliding modulus and limit strength.

Connection stiffness connection strength limit strength sliding modulus

References (6)

  1. 1 Long-term performance of adhesively bonded timber-concrete composites [DOI]
  2. 2 Experimental study of the mechanical behavior of timber-concrete shear connections with threaded reinforcing bars [DOI]
  3. 3 Timber-mortar composites: The effect of sol-gel surface modification on the wood-adhesive interface [DOI]
  4. 4 Pullout strength of axially loaded steel rods bonded in glulam at a 45º angle to the grain [DOI]
  5. 5 Pull out Strength Evaluation of Steel Bars Bonded-in to 45° in Round Timbers of Corymbia citriodora Treated with CCA [DOI]
  6. 6 Modelagem numérica do comportamento de ligações com parafusos auto-atarraxantes em X em corpos de prova de MLC com madeiras do tipo Eucalipto urograndis [DOI]

Cited by 8

Análise de barras de aço ancoradas na madeira utilizando adesivos estruturais

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Análise da representatividade e da densidade aparente como estimadoras do módulo de elasticidade da classe C60 da NBR7190:1997

Francisco Antonio Rocco Lahr, Eduardo Chahud, Felipe Nascimento Arroyo · Ambiente Construído · 2022

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