Adaptation of a wood theoretical fracture model for predicting splitting capacity of dowelled connections in bamboo

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Abstract

A theoretical model for predicting splitting capacity of dowelled connections in wood has been adapted to suit round bamboo culm. The maximum shear force in a connection was derived based on the energy approach and simple beam theory. The model contains a fracture toughness parameter which was estimated through analysis of existing experimental data for a set of 3-point bending tests with a dowelled connection at the midspan in G. angustifolia (Guadua) bamboo. Based on the calculated values and the derived equation, a simple formula for predicting the maximum splitting force in Guadua dowelled connection was proposed. Additionally, experimental data for a standardized tension perpendicular to fibre test for bamboo (split-pin test) was analysed, and the two tests were correlated through their fracture
properties. The proposed model appears to correlate well with the data, with coefficients of variation around 20%, as it would be expected for a natural material like bamboo.
Original languageEnglish
Publication statusPublished - 10 Sep 2020
EventTimber Online - Online
Duration: 9 Sep 202010 Sep 2020
https://10times.com/e1s5-1g11-xrfp

Conference

ConferenceTimber Online
Abbreviated titleTimber 2020
Period9/09/2010/09/20
Internet address

Keywords

  • bamboo connections
  • splitting
  • fracture

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