نوع مقاله : پژوهشی
نویسندگان
1 دانشکده مهندسی عمران- دانشگاه تبریز
2 دانشکده مهندسی عمران - دانشگاه تبریز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Structures can have desirable efficiency against natural hazards, such as wind and earthquake, if the maximum displacements remain as small as possible. In order to decrease the structural undesirable seismic noise, increase of ductile and dampers has been studied. In semi-active tuned mass dampers, the proper time dependent damping can be determined using fuzzy control.A tuned mass damper with nonlinear stiffness and a fuzzy controller is designed in this study for semi-active tuned mass damper to decrease seismic vibration of buildings. Fuzzy control can connect input variables to output ones; in this way, not only the computational efforts are reduced, but also the uncertainty of parameters can also be considered and investigated due to using linguistic variables rather than numeric variables.A multi-degree freedom building structure with ten stories is analyzed. This
building has been subjected to the Abgine, Avaj and El Centro earthquakes. The structure analyses are performed for without damper, passive damper, and the proposed damper cases; in each case, maximum displacement of the stories, RMS displacement of the stories, and RMS acceleration of the stories are compared with one another. The results show that the proposed damper decreases the structural displacements where more desirable results can be obtained with smaller structural damping.In El Centro earthquake, by the proposed damper, the reduction of peak displacements is more than 37\%, the reduction of RMS displacements is more than 84\%, and the reduction of RMS accelerations is more than 72\%. In Abgine earthquake, by the proposed damper, the reduction of peak displacements is more than 30\%, the reduction of RMS displacements is more than 53\% and the reduction of RMS accelerations is more than 27\%. In Avaj earthquake, by the proposed damper, the reduction of peak displacements is more than 36\%, the reduction of RMS displacements is more than 69\%, and the reduction of RMS accelerations is more than 49\%.
کلیدواژهها [English]
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