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https://hdl.handle.net/1822/44061
Título: | The influences of moisture content variation, number and width of gaps on the withdrawal resistance of self tapping screws inserted in cross laminated timber |
Autor(es): | Silva, Catarina V. Branco, Jorge M. Ringhofer, A. Lourenço, Paulo B. Schickhofer, G. |
Palavras-chave: | Timber structures Moisture induced stresses Self-tapping screws CLT Cross laminated timber Moisture content variation Withdrawal resistance Axial loading |
Data: | 2016 |
Editora: | Elsevier 1 |
Revista: | Construction and Building Materials |
Citação: | Silva, C., Branco, J.M., Ringhofer, A., Lourenço, P.B., Schickhofer, G., The influences of moisture content variation, number and width of gaps on the withdrawal resistance of self-tapping screws inserted in cross laminated timber. Construction and Building Materials. 125 (2016) 1205–1215. |
Resumo(s): | A large experimental campaign comprised of 470 withdrawal tests was carried out, aiming to quantify the withdrawal resistance of self-tapping screws (STS) inserted in the side face of cross laminated timber (CLT) elements. In order to deeply understand the “CLT-STS” composite model, the experimental tests considered two main parameters: (i) simple and cyclic changes on moisture content (MC) and (ii) number and width of gaps. Regarding (i), three individual groups of test specimens were stabilized with 8%, 12% and 18% of moisture content and one group was submitted to a six month RH cycle (between 30% and 90% RH). Concerning (ii), different test configurations with 0 (REF), 1, 2 and 3 gaps, and widths equal to 0mm (GAP0) or 4mm (GAP4), were tested. The influences of MC and number of gaps were modeled by means of least square method. Moreover, a revision of a prediction model developed by Uibel and Blaß (2007) was proposed. The main findings of the experimental campaign were: the decrease of withdrawal resistance for specimens tested with MC=18% in most configurations; the unexpected increase of withdrawal resistance as the number of gaps with 0mm increased; and, the surprising increase of withdrawal resistance for REF specimens submitted to the RH cycle. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44061 |
DOI: | 10.1016/j.conbuildmat.2016.09.008 |
ISSN: | 0950-0618 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Manuscript.CMB.pdf | 1,29 MB | Adobe PDF | Ver/Abrir |