Spectral analysis and Assessment of a net-zero base-shear energy dissipation approach for seismic energy mitigation

摘要: Combining passive and semi-active damping has unique benefits that cannot be achieved through other techniques alone. Passive high force to volume (HF2V) lead dampers offer energy dissipation, but have no ability customise overall response. Semi-active resetable devices adaptability custom hysteresis loops can reduce both displacement base shear, are limited in dissipation capability. Together, these a new concept maximised response reduction, without increasing shear – net zero base-shear concept. This paper combines HF2V devices, with design levels up 10% of weight, resettable device nominal stiffness 100% column stiffness. A spectral analysis is run size the iteratively at each period achieve maximum reductions median shear. The results show 50% reduction for low suite, 40% medium suites. Towards longer periods, factors tend 1.0, indicating net-zero base-shear. situation never reached below structural 2.5s, where less than as well force. Overall, independent scaling, analyses using ground motion specific mean velocities 1m/s velocity sizing capacity yield closely similar results. Comparisons also drawn between performance combined system systems