نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه ارومیه، ارومیه، ایران.
2 استادیار گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه ارومیه، ارومیه، ایران. رایانامه
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In recent decades, viscoelastic dampers have attracted the attention of many researchers due to their reasonable cost, ease of construc-tion, and high energy dissipation capacity. The mechanical charac-teristics of these dampers are directly influenced by the properties of the polymeric materials used in their fabrication. Such materials are sensitive to displacement amplitude, loading frequency, temperature, and geometry, making the process of finding a suitable viscoelastic composition for damper design both complex and time-consuming.
In this study, small-scale planar dampers were first constructed to compare two polymeric compositions: one based on natural rubber and the other on chlorobutyl rubber. The results of cyclic loading tests showed that the viscoelastic damper made with chlorobutyl pol-ymer exhibited significantly better damping performance than the one made with natural rubber.
Based on these findings, full scale cylindrical dampers were fabricat-ed using the chlorobutyl based composition and tested under cyclic loading with a hydraulic jack. The goal was to investigate the effects of loading rate, thickness of the viscoelastic layer, and applied strain.
The results indicated that increasing the loading rate and strain led to greater energy dissipation and load bearing capacity. Additionally, while reducing the viscoelastic layer thickness had little impact on damping, it did enhance the load bearing capacity.
کلیدواژهها [English]
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