Performance-Based Wind Design of Tall Buildings Considering the Nonlinearity in Building Response

Over recent years, the application of performance-based design (PBD) has continually grown in tall buildings and other structures excited by large wind loads. PBD also become a mainstream approach to assess reduce risks rehabilitation existing structures. The significant wind-related economic losses incurred every year around world have prompted researchers develop methods reframe engineering embrace concepts PBD. main objective (PBWE) is adequacy structure terms decision variables (DVs) set forth stakeholders. Each DV defined satisfy specific performance levels such as operational, immediate occupancy, life safety, collapse prevention. are based on acceptable strength serviceability requirements both structural nonstructural components. They reflect probable damage, casualties, downtime, costs repair. In this paper, 44-story steel frame building under action loads was analyzed evaluated using To understand response long-duration loads, subjected randomly varying for duration 30 min. Different time history analyses were conducted with speeds between 45 80 m/s (100 180 mph). basic speed preliminary static analysis 58 (130 responses recorded include acceleration displacement histories at floor level. These used evaluate peak root mean squared (RMS) variations interstory drift along height make comparisons different speeds. member forces identify locations plastic hinges interpret any unusual accelerations displacements building. fragility loss ratio curves presented, showing parameters comparison limiting threshold specified FEMA categorize components into damage states (DSs) corresponding repair or replacement.