The Cloak Bridge in Český Krumlov – measuring of mechanical properties

0477197 - ÚTAM 2018 RIV SE eng C - Konferenční příspěvek (zahraniční konf.)
Kloiber, Michal - Sebera, V. - Hrivnák, Jaroslav - Tippner, J. - Kunecký, Jiří
The Cloak Bridge in Český Krumlov – measuring of mechanical properties.
Conference proceedings, ICTB 2017, 3rd International Conference on Timber Bridges. Skelleftea: RISE Research Institutes of Sweden, 2017. SP Rapport 2017:26. ISSN 0284-5172.
[International Conference on Timber Bridges, ICTB 2017 /3./. Skelleftea (SE), 26.06.2017-29.06.2017]
Grant CEP: GA MK(CZ) DG16P02M026; GA MŠMT(CZ) LO1219
Klíčová slova: model of device * mechanical properties
Obor OECD: Construction engineering, Municipal and structural engineering

Timber bridges are often exposed to harsh conditions of the environment. The exposure of the timber structure often leads to its deterioration. Standard test procedures to determine typical properties of wood cannot be used as there is the requirement of the minimum interference with the structure. Several non-destructive testing (NDT) methods for the determination of timber condition have been developed and are used. However, the results of NDT can be used to predict mechanical properties of timber elements only to a limited degree. Semi-destructive testing (SDT) methods are a compromise. In the paper a functional model of a device that allows for the measurement of conventional strength and modulus of deformation of timber in compression parallel to the grain is presented. The device is inserted to a bored hole and pushes the jaws apart with a small test jack loading the bore walls. This paper presents possible use of the device for surveys of timber bridges.
Trvalý link: http://hdl.handle.net/11104/0273569