Finite Element Modelling of Log Wall Corner Joints

The paper presents outcomes of the numerical research performed on standard and dovetail corner joints under lateral loads. An overview of the past research on log shear walls is also presented. To the authors’ best knowledge, currently, there are no specific design guidelines available in the code for the design of log shear walls, implying the need to investigate the performance of log shear walls. This research explores the performance of the log shear wall corner joint system of standard joint and dovetail types using numerical methods based on research available in the literature. A parametric study is performed to study the effect of gap size provided between two orthogonal logs and the presence of wood and steel dowels provided as joinery between log courses on the performance of such a structural system. The research outcomes are the force-displacement curves. Variability of 8% is seen in the reaction forces with the change of gap size for the case of the standard joint, while a variation of 10% is observed in the reaction forces for the dovetail joint system.





References:
[1] P. Marjan, B. Deacon and E. Karacabeyli, "Testing of lateral resistance of handcrafted log walls Phase I and II," International Log Builders Association, 2002.
[2] National Association of Home Builders NAHB," NAHB Web Site, Jan 2007. (Online).
[3] T. Hahney, "How log buildings resist lateral loads," Log Building News;Number 32, 2000.
[4] R. J. Scott, R. J. Leichti and T. H. Miller, "An experimental investigation of foundation anchorage details and base shear capacity for log buildings," Forest Products Journal, vol. 55, no. 4, pp. 38-45, 2005.
[5] A. Salenikovich, "The racking performance of light-frame shearwalls," Ph.D. dissertation, Virginia Tech, 2000.
[6] D. A. Graham, D. M. Carradine, D. A. Bender and J. D. Dolan, "Performance of log shear walls subjected to monotonic and reverse-cyclic loading," Journal of Structural Engineering, vol. 136, no. 1, pp. 37-45, 2010.
[7] A. Buchanan and D. Moroder, "Log house performance in the 2016 Kaikoura earthquake," Bulletin of the New Zealand Society for Earthquake Engineering, vol. 50, no. 2, pp. 225-236, 2017.
[8] C. Bedon, M. Fragiacomo, C. Amadio and C. Sadoc, "Experimental study and numerical investigation of blockhaus shear walls subjected to in-plane seismic loads," Journal of Structural Engineering, vol. 141, no. 4, 2015.
[9] P. Grossi, T. Sartori, I. Giongo and R. & Tomasi, "Analysis of timber log-house construction system via experimental testing and analytical modelling," Construction and Building Materials, vol. 102, pp. 1127-1144, 2016.
[10] B. Coffey, "From shanty to house: log construction in nineteenth-century Ontario," International Society for Landscape, Place & Material Culture, vol. 16, no. 2, pp. 61-75, 1984.
[11] Abaqus, F.E.A. V. 6.12 Computer Software; Dassault Systèmes: Providence, RI, USA, 2015.
[12] M. Sciomenta, C. Bedon, M. Fragiacomo and A. Luongo, "Shear performance assessment of timber log-house walls under in-plane lateral loads via numerical and analytical modelling," Buildings, vol. 8, no. 8, pp. 99, 2018.
[13] T. Giovannini, P. Grossi and R. Tomasi, "Blockhaus system: Experimental characterization of corner joints and shear walls," In Proceedings of the World Conference on Timber Engineering, pp. 10-14, 2014.
[14] C. Bedon and M. Fragiacomo, "Numerical investigation of timber log-haus walls with steel dovetail reinforcements under in-plane seismic loads," Advances in Civil Engineering, 2018.