CHARACTERISTICS OF LUMBER-TO-LUMBER FRAMING CONNECTIONS IN LIGHT-FRAME WOOD STRUCTURES

摘要

Connections are arguably the most important part of light-frame wood structures (LFWS). They hold structural components together and transfer forces from one component to another. The majority of connections in LFWS are sheathing-to-lumber frame and lumber-to-lumber framing connections. Accurate prediction of structural response from analytical or numerical models of LFWS depends largely on accurate characterization of connection behaviours, which are normally non-linear. The main connection property required for analytical or numerical model of LFWS is load-slip response. Most of the connection test data available in the literature have been used for deriving connection design values (yield load, ultimate load, ductility), and there is limited amount of connection load-deformation data for use in whole-building numerical models. The main objective of this study is to test various nail lumber-to-lumber framing connections used in LFWS to generate input properties into 3-d numerical models. Tests were conducted on roof-to-wall connection, internal-to-external wall connection, and wall to-floor connection. Load-slip responses under load applied in different directions were determined. Furthermore, this paper discusses the load-slip response and failure mechanism of each type of connection, and their implication on 3-d system responses.