Structural assessment of a lapped scarf joint applied to historical timber constructions in central Europe

ABSTRACT

The article deals with assessment of suitable applications of all-wooden lapped scarf joints intended for use in retrofitting of existing historical timber structures in Central Europe. The first part of the article addresses the bearing capacity and stiffness of a lapped scarf joint. In the second part, four types of roof structures typical for the region were analyzed and potential application of the joints is discussed. The third part of the article describes the influence of the application of the lap joints on the force distribution of the repaired structure, since lower stiffness of one member induces forces elsewhere in the structure as it is transmitted by the other members to the rest of the structure. Extent and influence of the stiffness change on the force distribution is briefly discussed.

KEYWORDS:

• carpentry
• design limit state
• lap joint
• numerical modeling
• stiffness

Additional information

Funding

This article was prepared with a financial support from grant project NAKI II DG16P02M026 “Historical Timber Structures: Typology, Diagnostics and Traditional Wood Working”, Ministry of culture of the Czech Republic.