RT Journal Article
SR Electronic
A1 Pospíšil, Radek
A1 Havířová, Zdeňka
T1 Finite-element model of tread of stair with loadbearing bolts
JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
YR 2014
VO 56
IS 4
SP 143
OP 150
DO 10.11118/actaun200856040143
UL https://acta.mendelu.cz/artkey/acu-200804-0016.php
AB Stair with load bearing bolts is the special modern type of wooden staircase. This new type of staircase needs a basic verification by valuable standards for using in a different indoor using. Stair with load bearing bolts is combined wooden and metal materials and their mechanical properties in construction.The goal of this paper is to review wooden tread behaviour as consequence of static load defining by Eurocode 5, implemented in Czech standards. Static load is exactly defined in different load values and the loading places. The three different loading place dimensions are defined by Eurocode 5 too.The wooden tread mechanical behaviour is modelled by FEM software ANSYS 11.0. The numerical simulation offers the distribution of specific magnitudes in the numerical model. The analysis is broken into three parts: geometric model, material model and finite element model. The geometric model is created via script by Ansys Parametric Design Language. This method allows using parametric creation. Material model is defined like linear elastic material model for nine independent values.The defined evaluative criteria begin to ultimative limit state and serviability limit state. The Eurocode 5 for this case defined the minimum load value and the maximum deflection value in vertical direction. The last selected is Hoffman's failure criterion used to identify the possible crash places. Hoffman's failure criterion is appropriate for orthotropic material like wood. The loading places must simulate the real constructional tread using.