Study of the Effect of Geometric Parameters of Steel Block Slit Dampers on Energy Absorption
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International Journal of Steel Structures https://doi.org/10.1007/s13296-020-00343-3
Study of the Effect of Geometric Parameters of Steel Block Slit Dampers on Energy Absorption Peyman Katal Mohseni1 · Amin Zahedi‑khameneh1 · Omid Naeemifar1 Received: 26 August 2019 / Accepted: 3 April 2020 © Korean Society of Steel Construction 2020
Abstract In this study, a new type of steel block slit dampers (BSD) has been investigated. This type of damper not only provides good seismic performance but can be easily repaired and replaced after a strong earthquake. The stability of these dampers under periodic loading and the hysteresis behavior was also investigated in this study. It should be noted that energy dissipations and plastic deformation are concentrated only in steel slit dampers (SSDs) and plastic behavior of the beam and column, and they are both more energy-absorbing and more economical than SSDs. Therefore, in this study, effort has been made to optimize and increase the energy absorption of these dampers. Therefore, in this study, eight samples with different geometric dimensions have been simulated to develop and increase energy absorption of the steel BSD, and the results indicate that the slit dampers have more ductility and stiffness than those of previous studies, which considerably increased the energy absorption in hysteresis cycles in all specimens. Keywords Energy absorption · Block slit damper · Steel slit dampers · Hysteresis curve · Cyclic loading
1 Introduction Scientific discoveries in the late 1960s led to a better understanding of the nature of the earthquake and the importance of ductility in structures. As time passed, it changed the fundamentals of the earthquake and strength design. It is shown that the resistance-based design is essential but not adequate for strong and destructive earthquakes. Displacement capacity of structures should be considered because it can result in catastrophic events and make great cost due to probable failure of structures during destructive earthquakes. In recent decades, many studies have been done on controlling the structure response to wind and earthquake forces (Di Sarno and Elnashai 2008, 2009). Researchers have illustrated that braced systems are more common in current structures. Concentrically braced frames are one of the most effective methods for lateral resistance (Chan et al. 2015). Brace members in the convergent braced frame should provide stiffness, ductility, and resistance. Plastic buckling and tensile hinges in a brace are the main * Peyman Katal Mohseni [email protected] 1
Department of Civil Engineering, Malard Branch, Islamic Azad University, Malard, Iran
factors for absorbing energy which causes plastic hinges to extend in other parts of the structure (Khatib et al. 1988). These plastic hinges accomplish a good performance with yielding dampers. Yielding steel dampers are developed based on energy dissipation in structures through plastic displacements. This type of dampers is being used in New Zealand and Japan for the f
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