By Bohumil Kasal (auth.), Bohumil Kasal, Thomas Tannert (eds.)
Wood is likely one of the so much interesting structural fabrics and the single one who is really renewable. in addition to stone, wooden is the oldest structural fabric in the world and has been greatly used all through human background. as a result of its aesthetical price and confident environmental influence, wooden has skilled a renaissance in construction.
As a biodegradable, hygroscopic, non-isotropic fabric, wooden provides specific demanding situations for a certified operating with it and calls for thorough wisdom starting from biology to continuum mechanics.
This state of the art record displays the present wisdom within the zone of in situ overview of the actual and mechanical houses of wooden constructions. Nondestructive, semi-destructive and damaging equipment are defined in a scientific demeanour the place expertise, apparatus and barriers are mentioned. a number of the mentioned equipment are utilized in different fabrics akin to masonry and urban. many of the tools, besides the fact that, are particular to wooden and particular skills are required to appreciate and follow those tools successfully. latest tools are always greater and new tools are being built. This file comprises equipment which are utilized in perform or have proven major promise and feature a physique of information that helps statements made during this report.
This is a useable device for execs, researchers, educators and students
Read Online or Download In Situ Assessment of Structural Timber: State of the Art Report of the RILEM Technical Committee 215-AST PDF
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Wooden is likely one of the so much interesting structural fabrics and the single one who is really renewable. in addition to stone, wooden is the oldest structural fabric on the earth and has been commonly used all through human historical past. because of its aesthetical worth and confident environmental influence, wooden has skilled a renaissance in building.
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Extra info for In Situ Assessment of Structural Timber: State of the Art Report of the RILEM Technical Committee 215-AST
GPR penetration depth can also be limited in case of material with high permittivity. In fact, increasing permittivity indicates an increase of absorption and conduction. Then, GPR waves are rapidly attenuated, and the penetration depth decreases. The penetration depth is governed by moisture content and density of wood. It also depends on used frequency. Low frequencies have large wavelengths and high capacity of penetration compared with high frequencies. 5 GHz frequency, the penetration depth of GPR waves in material with high moisture content is less than 40 cm.
77–99, 2002. 22. ASTM E494-95. Standard Practice from Measuring Ultrasonic Velocity in Materials, ASTM International. 23. , Downs III, J. M. Nondestructive inspection of timber bridge structures. In: Proceedings of Nondestructive Evaluation of Civil Structures and Materials, University of Colorado, Boulder, CO, pp. 55–67, 1996. 24. W. , Application of stress wave-based nondestructive evaluation to wood. In: Proceedings of Nondestructive Evaluation of Civil Structures and Materials. University of Colorado, Boulder, CO, pp.
64, pp. 483–490, 2006. 15. Mallinson, P. Surface penetrating radar as an NDT tool. In: Proceedings 36th Annual British Conference on NDT, Cheltenham, UK, 1997. 16. , and Sami, Z. Detection of sub-surface anomalies in concrete bridge decks using ground penetrating radar. ACI Materials Journal, Vol. 94(5), pp. 396–408, 1997. 17. , and Arliguie, G. Effect of concrete moisture on radar signal amplitude. American Concrete Institute – Materials, Vol. 103(6), pp. 419–426, 2006. 18. -P. Nondestructive evaluation of concrete structures using geophysical methods: Correlation between electrical resistivity and radar measurements.