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  • 1.
    Olsson, Anders
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Probabilistic Analysis and Optimization of Roof Trusses2010In: Electronic Journal of Structural Engineering, ISSN 1443-9255, E-ISSN 1443-9255, Vol. 10, p. 74-89Article in journal (Refereed)
    Abstract [en]

    The influence of gap between wooden members and displaced nail-plates in roof trusses is investigated by means of probabilistic calculations and structural optimization. The employed mechanical model, using the finite element method, captures the non-linear behaviour of the nail-plate joints. The joint stiffness involves the size and location of the nail-plate, and the presence of contact or gap respectively between the wooden members. The analysis shows that even small initial gaps considerably increase the deflection of a roof truss. Misplaced nail-plates also effect the deflection negatively, but it is also shown that the deflection can be significantly decreased, and the utilization of nail-plates improved, by optimizing the nail-plate positions with respect to critical load cases and requirements.

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