Performance-based wind-induced structural and envelope damage assessment of engineered buildings through nonlinear dynamic analysis

Abstract

Performance-based wind engineering (PBWE) is undergoing a period of rapid development with numerous procedures and frameworks being proposed over the past few years. Notwithstanding these advancements, there is still a knowledge gap concerning the relative severity, dependency and rate of occurrence of structural and envelope damage in extreme wind events. This work is focused on investigating this problem for engineered buildings. In particular, envelope damage is estimated through a recently introduced PBWE framework that explicitly includes the effects of demands originating from dynamic net pressure and the structural responses. Structural damage is estimated through both fragility analysis as well as material yielding/hysteresis modeled through the adoption of a nonlinear fiber-based finite element formulation. Structural responses include the effects of large deformations through solving the finite element model in a corotational environment. To investigate the relative severity and dependency between the damages, a carefully calibrated archetype 45-story steel building located in Miami, FL, and subject to hurricane winds is studied. Probabilistic damage metrics are estimated for both the envelope and structural systems and are subsequently discussed in terms of relative severity, occurrence rates and nonlinear structural behavior.