Characterization and Implementation of Seismic Fuses In Steel Structures

Abstract

Due to the disturbing effects of an earthquake, study into the safety of structures for commonly occurring earthquakes is underway. As earthquakes are one of the main natural threats to life on the planet, many mechanisms have been implemented in structures for the goal of energy dissipation. The structural system's capacity to dissipate energy hysterically while suffering significant inelastic deformations without experiencing catastrophic breakdown, directly affects the probability of survival in the event of big earthquakes. By using the proper design process, one can achieve ductile performance during strong ground motion by recognising and preventing hazardous brittle failure circumstances. Different sorts of earthquake-related devices have been created and successfully placed into use to protect various types of structures. These devices enable steady and reliable hysteretic energy dissipation. Seismic energy is lost in metallic yield fuses due to the inelastic deformation of metals. Metals' tendency to yield serves as the dissipative mechanism of metallic dampers. Later, it is suitable to replace the damaged metal plates, which is more cost-effective. The current study characterises TADAS & ADAS type metallic yield dampers employing numerical and experimental techniques. It was discovered that the mechanical characteristics and geometry of a metallic damper controls its response. Study of different types of seismic fuses, which were researched earlier, have been done for this work. The device elastic stiffness, yield strength, and yield displacement are the main variables influencing the behaviour of TADAS & ADAS elements. By using the original TADAS & ADAS metallic damper designs made by researchers and published in literature, the design technique is validated. SAP2000 and ABAQUS are employed for the problem's analysis. Utilising the SAP2000 software, pushover analysis is performed to obtain the yield displacement of the structure. The design of TADAS & ADAS Metallic damper has been done based on the yield displacement of a structure. To characterise the damper's mechanical properties, cyclic loading is applied in ABAQUS FEM software. The TADAS type metallic yield damper was evaluated experimentally using two alternative approaches. The TADAS type metallic damper was implemented in 9 storey benchmark building & behaviour of the structure was studied for various base excitation. The outcomes of this research have implications for improving the seismic resilience of structures, promoting safer built environments and guiding future developments in the field of structural engineering.