Investigating steel slit dampers behavior in concrete structures
Leila Hosseinzadeh
1
(
Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
)
Seyed Majid Alavinia
2
(
Master of Science, Department of Civil Engineering, Aria University of Science and Sustainability, Tehran, Iran.
)
Ali Ghamari
3
(
Department of Civil Engineering, Darreh-Shahr Branch, Islamic Azad University, Darreh-Shahr, Iran.
)
Abbas Akbarpour
4
(
Assistant Professor, Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
)
Keywords: Strength, energy absorption, Stiffness, Diagonal bracing, Steel Slit Damper,
Abstract :
Iran is one of the most seismic countries in the world. Therefore, strengthening the existing structures is essential. Utilization of dampers in structures presumed as one of the best and common methods in seismic retrofitting. Dampers are components which are mostly used in increasing the attenuation and reducing the energy of earthquake. It is determined in various researches that dampers can decrease the displacement which is induced by earthquake efficiently. In these cases, the behavior of most components of structures is remained elastic. In this study, the effects of slit steel dampers (SSD) through concrete structures are evaluated. Therefore, four models of SSD were selected as described in follow: 3 single slit, 3 double slit, 5 single slit and 5 double slit in three thickness of 6, 8 and 10 (mm), which are used in concrete frame with single diagonal brace where connected to beam-column. The effects of increasing the number of slits from 3 to 5, from single to double and increasing the thickness were studied. The results show that by increasing the thickness of dampers, the area of force-displacement diagram, rigidity and strength are increased in frames. The frames which consisted with double 3 slit dampers shows better performance than 5 slit dampers. The frames with single 5 slit dampers by 10 mm thickness, decreased by 4.9% in rigidity, in comparison with double samples. Also, It is decreased in rigidity by 2.9% and 7.3% for single and double models, respectively.
