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Title: The assessment and applications of a new connector type for use in timber structural systems
Author: Coste, Guillaume
ISNI:       0000 0004 2704 2235
Awarding Body: Edinburgh Napier University
Current Institution: Edinburgh Napier University
Date of Award: 2010
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Helically shaped fasteners, as structural ties, were first developed in 1984. Their innovative helical design proved to be very efficient and structurally viable in numerous structural applications in masonry and stone construction. Over the years, their uses widened to include amongst others crack stitching, warm roof batten fixing and creating masonry lintels. Following the understanding that helically shaped fasteners could have considerable potential providing highly efficient jointing systems and offer a number of advantages in structural applications for connecting timber to timber as well as timber to masonry/concrete a research programme was developed. By conducting a review on the state of the art of timber jointing, the numerous methods for structural timber connections and the range of parameters that can influence the resistance of such joints were highlighted. Such a review allowed the development of an extensive experimental programme design to characterise helically shaped fasteners as structural timber connectors. The mechanical properties of helically shaped fasteners were first investigated and compared to common timber connectors. In accordance with the relevant European and British standards, the investigation showed that helically shaped fasteners exhibited a very ductile behaviour compared to other common fasteners. However the design equations of Eurocode 5, which were developed for common timber fasteners, did not accurately predict the characteristic values of helically shaped fasteners. Consequently, specific design equations were developed for predicting the characteristic helically shaped fasteners’ yield moment and embedment strength
Supervisor: Kermani, Abdy Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TH Building construction