Multi-variate seismic fragility assessment of CLT coupled wall systems

The cross-laminated timber coupled wall (CLT-CW) system, a recently proposed timber-based structural has limited understanding of its seismic performance. existing research in probabilistic fragility assessment (PSFA) CLT buildings reveals gap, particularly regarding comprehensive evaluation CLT-CW systems and the impact various design parameters. To fully describe state post-earthquake performance structures, state-of-the-art studies recommend using multi-variate analysis. Accordingly, this article presents bi-variate PSFA two engineering demand parameters: maximum residual inter-story drift ratios. For seismicity Vancouver, British Columbia, Canada, 11 prototype are evaluated considering different coupling ratio, beam shear force profile, configuration, building story height, ductility-related modification factor. Bi-dimensional numerical models developed OpenSees, incremental dynamic analyses performed 30 ground motion records. Three limit capacities three function combinations utilized to develop curves. curves under compared, effect parameters is investigated. This study contributes deeper systems, assisting engineers researchers assessing risk developing seismic-resilient structures.