Design database development and comparative performance assessment of connections in cross-laminated timber construction

The growing adoption of mass timber construction, along with the variety of building products, such as cross-laminated timber (CLT), calls for a comprehensive structural performance assessment for sustainability-based design purposes. On the other hand, the vast variety of mechanical joinery types necessitates a detailed and systematic understanding of connection mechanics. This investigation develops a comprehensive database of connections for mass CLT components, serving as a dynamic “dictionary” that could inform designers with optimal design scenarios. The database has collected, aggregated, and post-processed data related to mechanical performance from 522 sets of state-of-the-art connections used in mass timber construction practice and research worldwide, including 2048 associated test specimens. The database is utilized to systematically assess the performance of a credible range of commercially available timber joinery products, along with those developed through research and development in mass timber construction. The mechanical performance of the collected data is assessed through qualitative and quantitative metrics based on assembly, joinery, and fastener types under tensile and shear loading. The database is designed to be expandable and adaptable for a wide range of applications, enabling further exploration of the structural behavior of panelized mass timber systems. It also serves as a framework for developing and implementing performance-based, analytics-driven design methodologies. • Developed a comprehensive open-source database for CLT connection performance. • Analyzed 522 group sets and 2048 test specimens for structural performance insights. • Identified high-performing alternatives to conventional CLT shear wall connections. • Assessed qualitative and quantitative mechanical behavior of CLT joinery types. • Explored digital fabrication techniques to enhance CLT connection efficiency.