Integrated performance-based wind collapse assessment of structural and envelope systems of engineered buildings

Advancements in performance-based wind engineering have significantly enhanced the assessment of engineered building systems.However, the performance of building envelope systems-essential for ensuring life safety-remains insufficiently understood during extreme wind scenarios that can induce strong nonlinear structural behavior, potentially leading to building collapse.This study conducts a comprehensive performance assessment of a high-rise archetype building envelope system while explicitly accounting for the progressively increasing nonlinear structural behavior as structural collapse approaches.The relative severity of damage to the structural and envelope system are discussed as is the general validity of the framework.Key insights are obtained in terms of the evolution and spatial pattern of envelope damage, highlighting the time-dependent and coupled mechanisms that govern the progression of envelope damage.Furthermore, the influence of the choice parameters defining the fragility functions of the envelope system is quantitatively assessed, providing a comprehensive understanding of their effects on the reliability of the envelope system.