Abstract

Interest in high-performance mass timber systems is growing around the world. One promising option involves balloon-type CLT shear walls, which can be more efficient in tall timber construction when compared to traditional platform-type walls. This paper explores the behavior of 3-12 storey balloon-type CLT shear walls using quasi-static cyclic simulations. First, an accurate connection model is calibrated using the mechanics-based HYST subroutine. Then, full wall models are built using CLTWALL2D and validated using data from physical wall tests. Subsequently, an extensive parametric study is undertaken, investigating single and coupled (multi-panel) walls with various lap joint and hold-down details. The results show large variation, but high strength and stiffness and moderate ductility values (average 3.6) can be achieved. Strength, stiffness and ductility all decrease as the wall height increases.