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Structural Engineering and Mechanics Volume 28, Number 2, January30 2008, pages 239-257 DOI: http://dx.doi.org/10.12989/sem.2008.28.2.239 |
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Rational designing of double-sided nail plate joints using the finite element method |
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Tinozivashe Zhou and Z. W. Guan
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| Abstract | ||
| Double-sided punched metal plate timber fasteners present projections on both sides, which offer improved joint fire resistance and better joint aesthetics. In this paper, 3-D nonlinear finite element models were developed to simulate double-sided nail plate fastener timber joints. The models, incorporating orthotropic elasticity, Hill?s yield criterion and elasto-plasticity and contact algorithms, are capable of simulating complex contact between the tooth and the timber and between the base plate and the timber in a fastener. Using validated models, parametric studies of the double-sided nail plate joints was undertaken to cover the tooth length and the tooth width. Optimal configuration was assumed to have been attained when increase in nail plate tooth width did not result in a raise in joint capacity, in conjunction with the optimum tooth length. This paper presents the first attempt to model and optimise tooth profile of double-sided nail plate fastener timber joints, which offers rational designs of such fasteners. | ||
| Key Words | ||
| contact; double-sided nail plate fastener; finite element; parametric study; rational design. | ||
| Address | ||
| Tinozivashe Zhou: School of the Environment, University of Brighton, Moulsecoomb, Lewes Road, Brighton, East Sussex, BN2 4GJ, United Kingdom Z. W. Guan: Dept. of Engineering, The University of Liverpool, Brownlow Hill, Liverpool, L69 3GQ, United Kingdom | ||