Multiple Shear Plane Connections

Where a connection involves multiple shear planes and the connected members are at varying angles to each other, it is not possible to directly apply the joint strength equations given in 11.3 for toothed-plate connectors and in Section 11.4 for ring or split-ring connectors.

For this situation, the guidance given in EC5, 8.1.3(1), is that the resistance of each shear plane in the connection is derived on the assumption that the shear plane forms part of a series of three-member connections and the connection strength is derived by combining the strength values of those failure modes that are compatible with each other. When dealing with ring and shear-plate connectors, all failure modes will be compatible. However, when considering the failure modes associated with the toothed-plate connector bolt in toothed-plate connections, EC5 requires that failure

Fig. 11.10. Member loaded in tension at an angle to the grain.

modes (a), (b), (g) and (h) in Table 10.2 or modes (e), (f) and (j/l) in Table 10.3 are not combined with the other failure modes.

The procedure to be followed to determine the joint strength in multiple member joints formed with connectors will, in principle, be the same as that used for multiple member joints formed using metal dowel type fasteners, as described in 10.7.

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