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Lifetime, residual strength, and quality of wood and other viscoelastic building materials

Lebensdauer, Festigkeitsverlauf und Qualität von Holz und anderen viskoelastischen Baumaterialien

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Abstract

A theoretical analysis of the influence of wood quality on dead load lifetime is made on the basis of the authors DVM concept of building materials (Damaged Viscoelastic Material). It is shown that low quality structural wood and high quality clear wood lives longer than normal clear wood when loaded to the same fraction of respective strengths. At middle range qualities lifetime is practically not influenced by quality. Also considered is residual strength of wood during its lifetime experience. The results presented are valid in principle for a number of building materials applying to the DVM concept.

Zusammenfassung

Auf der Grundlage des DVM-Ansatzes (Damaged Viscoelastle Material), das vom Autor fur Baustoffe entwickelt wurde, wird der Einfluß der Holzqualität auf die Lebensdauer bet konstanter Beanspruchung theoretisch untersucht. Es wird gezeigt, daß Rauholz geringer Qualität und fehlerfreies Holz hoher qualität eine hohere Lebensdauer aufweisen als fehlerfreies Holz normaler qualität, wenn es mit der jwels gleichen relativen Belastung, d.h. dem gletehen Bruchteil seiner jeweiligen Kurzeitfestigkeit, belastet wird. Im Bereich mittlerer Holzqualität hat die Holzgüte praktisch keinen Einfluß auf die Lebensdauer. Weiter wird untersucht, wie sich die Festigkeit des Holzes wihrend der Belastungsdauer ändert. Die dargestellten Ergebnisse können grundsätzlich auch auf andere Baustoffe, für die der DVM-Ansatz gilt, übertragen werden.

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  1. Building Materials Laboratory, Technical University of Denmark, Building 118, DK-2800, Lyngby

    L. Fuglsang Nielsen

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Fuglsang Nielsen, L. Lifetime, residual strength, and quality of wood and other viscoelastic building materials. Holz als Roh-und Werkstoff 49, 451–455 (1991). https://doi.org/10.1007/BF02619472

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