Performance‐based design of tall‐coupled cross‐laminated timber wall building
Biniam Tekle Teweldebrhan, Solomon Tesfamariam
Abstract
Abstract Growing demand in sustainable high‐rise timber structures is satisfied by proposing innovative structural systems that enhance the building's stiffness, strength, and energy‐dissipation capacity. This study propose and develop the performance‐based design (PBD) guideline for balloon type cross‐laminated timber (CLT) coupled wall (CLT‐CW) structure. In this system, the CLT shear‐walls are connected with energy dissipation coupling beams that comprise shear‐links and in return reduce the seismic demand of the system. To facilitate the desired rocking deformation mode of CLT shear‐wall panels, buckling‐restrained brace (BRB) hold‐downs are used. Utility of the proposed system and design is applied on a 20‐story balloon CLT‐CW system. To investigate the effect of coupling ratio () on the behavior of the system, five values (10%–50%) are used. Nonlinear and incremental dynamic analyses (IDAs) are performed using suitable set of 30 ground motion (GM) records that reflects the seismicity of Vancouver, Canada. Fragility curves are developed and compared considering both the collapse and non‐collapse limit states. The results show that, for a given CLT‐CW system, a system with higher value exhibits better seismic performance.