Damage-based optimal design of friction dampers in multistory chevron braced steel frames

摘要: Abstract In this paper, a probability-based design methodology of the friction dampers in multi-story steel frames is proposed. Both slip force device and stiffness ratio system are analyzed as two important parameters, which affect behavior structures equipped with devices. The seismic fragility damped braced evaluated used to identify optimal ranges above-mentioned parameters so minimize overall damage probability structure under action strong ground motions. For purpose, functions structural models derived using nonlinear incremental dynamic analyses. To demonstrate efficiency proposed method, three moment resisting damper systems (including chevron braces devices) considered for purpose performance analysis. results analyses show that largest each model corresponds case higher lower ratio, where undesirable buckling failure will govern before full activation damper. building frames, range lies between 40% 55% total weight recommended value 2.