Enhancing Seismic Performance of Steel Structures Using Seismic Fuses: A Study of G+3 Buildings in Indore
摘要
This paper explores the enhancement of seismic performance in steel structures within earthquake-prone regions through the introduction of seismic fuses, aiming to create a damage-controlled structure. Conventional design methods often fail to accurately predict structural behavior during seismic events. To address this, a performance-based design approach is proposed, incorporating seismic fuse devices that function similar to electrical fuses by sacrificing themselves to absorb and dissipate earthquake energy. This approach protects primary structural components, whereas in conventional buildings, beams must yield to dissipate energy, causing damage to the primary structure. The study evaluates several seismic design methods for G+3 steel buildings situated in Indore, characterized by rock strata with a shear wave velocity of 690 m/s and classified as seismic Zone 3. The methods include linear static, linear dynamic, and nonlinear static pushover analyses. Guidelines from the Applied Technology Council (ATC-40) and the Federal Emergency Management Agency (FEMA-356) for pushover analysis are employed to assess structural performance. Nonlinear analysis is carried out to determine the performance of seismic fuses, based on the sequence of yielding identified through pushover analysis, to ensure efficient energy dissipation and structural resilience. The integration of seismic fuses significantly enhances seismic performance by dissipating energy through controlled yielding. This approach improves seismic resilience, reduces repair costs, enables building occupancy within a limited time (a few weeks to months) after a strong earthquake, and enhances overall safety in earthquake-prone regions.