The experimental study reported upon in this thesis focused on the development of physical data characterizing the behavior of single-shear, laterally-loaded connections when loaded up to and beyond capacity (i.e., maximum resistance). Specimens included a wide array of connection configurations common in wood construction. All connections were tested monotonically in tension under displacement-controlled loading, parallel to the grain. Results of these tests are presented and discussed. Test variables of nailed connections included nail diameter, side member material type, and side member thickness. Test variables of bolted connections included bolt diameter, commercial species grouping of the main and side members, and main member thickness. Conclusions drawn from this research include mechanics-based explanations of numerous connection response trends observed with respect to test variables. Additionally, observed factors of safety and over-strengths of current design values are quantified on a capacity-basis. / Master of Science

Analysis and design of Cross-Laminated Timber (CLT) walls under gravity loads have been outlined in the Canadian timber design standard with an adequate amount of details. The methods for designing shearwalls to resist lateral loads have not yet been fully developed, with only concepts being adopted, based on generalized capacity-based design concepts and definitions of yielding and non-yielding components. Several studies have focused on developing analytical expressions and design approaches for multi-panel CLT shearwalls, assuming angle brackets only behave in shear to prevent sliding, while ignoring compression zone effects in CLT panels. These assumptions may simplify the analysis, but they are not practical, especially since contemporary angle brackets are available on the market with uplift capacities comparable to those of hold-down connections. This study aimed to investigate the lateral behaviour of multi-panel CLT shearwalls and provided practical and comprehensive analytical expressions and design procedures for this type of structure. The analysis aimed to integrate the effects of all boundary connections, including hold-downs, angle brackets, panel-to-panel connections, and compression zones, into the analysis. On the basis of the developed analytical expressions, a capacity-based design procedure was proposed, which promoted rocking behaviour and optimized energy dissipation in the shearwall system. A novel yield hierarchy among various connections was introduced, and expressions for associated over-strength factors are proposed. For multi-storey applications, an approach which ensures uniform energy dissipation along the structure height and limits soft-storey failures was also presented. Experimental tests were conducted at the connection level to study the performance of conventional connections used in CLT shearwalls and to obtain their associated mechanical properties. Furthermore, the performance of multi-panel CLT shearwalls was investigated by conducting wall-level experimental tests to investigate the kinematic modes and establish levels of resistance and deflection. Numerical models were developed to verify the mathematical accuracy of the proposed analytical and design expressions. Also, to validate the proposed analytical expressions, they were compared against the numerical models, as well as the wall-level experimental tests. The results showed a reasonable match between the different approaches in terms of the general shape of the curves and kinematic behaviour.