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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 3696025, 11 pages
http://dx.doi.org/10.1155/2016/3696025
Research Article

Long-Span Wooden Structural Floors with Self-Tensioning System: Performance under Asymmetrical Loads

Department of Construction Technology, Universidade da Coruña, A Coruña, Spain

Received 1 June 2016; Accepted 7 July 2016

Academic Editor: Ana S. Guimarães

Copyright © 2016 J. Estévez-Cimadevila et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study analyzes the performance of wooden structural floors equipped with the self-tensioning system patented by the authors, consisting of a force multiplying mechanism connected to a self-tensioning tendon, which is activated automatically when the load is applied to the structural element. The paper describes the system’s difficulties when the structural floor is subjected to asymmetrical loads. The proposed solution consists of anchoring the tendon by an adhesive connection in the central part of the piece yielding a favorable redistribution of the bending moments and an effective performance in terms of deformations. The comparative study focuses on π-shape cross section pieces with spans of 12 m and 15 m, using sections without prestressing and with initial prestressing and self-tensioning system.