Abstract
Fire resistance and residual carrying capacity of cross-laminated timber (CLT) structure are key considerations in multi-story and high-rise buildings. These aspects were studied for CLT wall-floor angle bracket connections using 60 and 80 mm self-tapping screws. Ten connections were tested for static loading at ambient temperature and residual post-fire carrying capacity, giving temperature–time, carbonization and load–displacement values. A finite element model of the connections produces a constitutive relationship for wood transverse-grain compression densification, and nonlinear spring element is used to simulate the failure mode of screw. Findings include that longer screws improve post-fire connection performance but reduce ductility and increase brittleness. This provides a reference for design of fire-resistant CLT connections.
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