Compression resistance of short members as the basis for structural grading of Guadua angustifolia

Effendi Bahtiar, David Trujillo, Naresworo Nugroho

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13 Citations (Scopus)
43 Downloads (Pure)

Abstract

This study develops the structural grading of Guadua bamboo culms subjected to axial compression. Both strength and capacity grading methods are explored. Several candidates for Indicating Properties (IPs) were measured and calculated. The strongest coefficients of determinations for structural grading were related to densities [e.g., (conventional) density (ρ) and linear mass (q)]. Density (ρ) is best IP for strength grading if the culm section is taken as a hollow circle. Alternatively, linear density or linear mass (q) provides higher coefficients of determination when used for capacity grading. By using intervals of each indicating property (IP), several structural grades were developed. Each grade has its Grade Determining Properties (GDPs) include mean compressive strength (fc) or load carrying capacity (Fu), five percent exclusion limit (R0.05), and characteristic structural property (Rk). The latter could be used in structural design. As bamboo is a hygroscopic material, the IP should be adjusted into standardized moisture content (12% Mc). The moisture content effect on compressive strength and capacity should also be measured to increase the reliability of estimation if densities (ρ or q) are chosen as the IPs. Since external diameter can infer the linear mass (q) and is also significantly correlated with wall thickness (t), average external diameter (D) may also be used as the sole IP in capacity grading. Structural grading can reduce the variability of Guadua’s structural properties since it classifies the culm into several suitable grades.
Original languageEnglish
Article number118759
JournalConstruction and Building Materials
Volume249
Early online date22 Mar 2020
DOIs
Publication statusPublished - 20 Jul 2020

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 249, (2020)
DOI: 10.1016/j.conbuildmat.2020.118759

© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funder

Authors would like to express many thanks to the Global Innovation Initiative and the US Department of State , who funded Dr Bahtiar’s fellowship to Coventry University to undertake the experimental aspect of this study.

Keywords

  • Allowable stress
  • Bamboo construction
  • Capacity grading
  • Characteristics property
  • Regression analysis
  • Strength grading
  • Structural analysis and design

ASJC Scopus subject areas

  • Materials Science(all)
  • Building and Construction
  • Civil and Structural Engineering

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