A New Stainless-Steel Tube-in-Tube Damper for Seismic Protection of Structures

Abstract

This paper investigates a new stainless-steel tube-in-tube damper (SS-TTD) designed for the passive control of structures subjected to seismic loadings. It consists of two tubes assembled in a telescopic configuration. A series of slits are cut on the walls of the exterior tube in order to create a series of strips with a large height-to-width ratio. The exterior tube is connected to the interior tube so that when the brace-type damper is subjected to forced axial displacements, the strips dissipate energy in the form of flexural plastic deformations. The performance of the SS-TTD is assessed experimentally through quasi-static and dynamic shaking table tests. Its ultimate energy dissipation capacity is quantitatively evaluated, and a procedure is proposed to predict the failure. The cumulative ductility of the SS-TTD is about 4-fold larger than that reported for other dampers based on slit-type plates in previous studies. Its ultimate energy dissipation capacity is 3- and 16-fold higher than that of slit-type plates made of mild steel and high-strength steel, respectively. Finally, two hysteretic models are investigated and compared to characterise the hysteretic behaviour of the SS-TTD under arbitrarily applied cyclic loads.

Seismic Resilience of Steel-Braced Frames Incorporating Steel Slit Dampers: A Review and Comparative Numerical Analysis

“…Depending on the specific situation or element type, these slits can also be introduced in the web or flange of an I-section. SSDs can be classified into two main categories based on their geometric characteristics: uniform prismatic and uniform non-prismatic slit dampers [58,59]. Prismatic dampers maintain a consistent cross-sectional shape for all steel strips throughout the device's height, as their name implies.…”

“…Oh (1998) [60] introduced SSDs in the literature, as depicted in Figure 4. A similar concept was further investigated and implemented experimentally by González-Sanz et al [58]. Their study focused on steel slit plate dampers subjected to shear deformation.…”

“…González-Sanz et al [58] investigated the development of a mild steel damper with non-uniform vertical slits. The study aimed to analyze the relationship between different forms of vertical slits on the core energy plate and their ability to dissipate energy and resist buckling.…”

Prediction of steel plate-based damper for improving the behavior of concentrically braced frames based on RSM and ML approaches for sustainable structures

“…During an earthquake, the steel plates deform and absorb energy, reducing the seismic forces transmitted to the building. The advantages of steel plate-based dampers include: Energy dissipation: The steel plates absorb and dissipate seismic energy, reducing the forces transmitted to the structure 5 . This helps to minimize structural damage and protect the building and its occupants.…”

Seismic Isolation Effect of Non-Water Reacted Two-Component Polymeric Material Coating on Tunnels

“…The seismic response mitigation and seismic protection of structures have been discussed in recent decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. For tunnels, coating with soft seismic isolation materials has been studied by many researchers.…”