Modelling the Roof-to-Wall Connections and Roof failures in residential, wood-frame buildings under realistic wind loads

摘要

This paper presents a combined load sharing, nail-slip model to predict the failure of roof-to-wall toe-nail connections in residential wood-frame buildings. The roof elements, idealized as an equivalent 2-D beam in the model, are used in combination with bi-linear and non-linear load-displacement curves of the roof-to-wall-connections to describe the progressive nail withdrawal observed in full-scale experiments. In particular, elastic beam theory is used to quantify the load sharing between the adjacent roof-to-wall-connections, as well as to characterize the overall failure of such connections and the roof. The model demonstrates its capability in effectively capturing the damage progression and load sharing effects exhibited by a system of interconnected roof-to-wall-connections, subjected to fluctuating wind loads, by predicting the connection responses that reasonably match with the outcomes of controlled load sharing experiments. The validated model is further used to predict the response of the inter-connected roof-to-wall-connections for a gable roof building tested in full-scale.