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This study aims to evaluate energy absorption capacity of hysteretic steel damper for earthquake protection of structures. These types of steel dampers are fabricated from mild steel plate with different geometrical shapes on the side part, namely, straight, concave, and convex shapes. The performance of the proposed device was verified experimenta...
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Citations
... Oh et al. [33] implied the damper in a beam-column connection as an energy dissipater. In a study by Teruna et al. [34], the convex-shaped edges of SSDs showed a more stable hysteresis cycle, thereby preventing low cycle fatigue. In a study by Lee et al. [35], a number of configurations were proposed and evaluated for SSD, including the hourglass, dumb-bell, and tapered shapes. ...
... ADAS devices consisting of X-shaped mild steel plates were proposed by Bergman and Goel 11 (Fig. 4). Further experimental studies on the X-shaped ADAS were carried out by Whittaker et al. 12 , Teruna et al. 13 , among others. Tsai et al. 14 proposed triangular ADAS and established its effectiveness for steel moment-resisting frames. ...
Passive dampers encompass a range of non-power consuming devices that can be utilized for the mitigation of structural vibration induced by external excitation, such as wind, earthquake, sea waves, and traffic. Common types of passive dampers include friction dampers, fluid viscous dampers, viscoelastic dampers, metallic dampers, tuned mass dampers and tuned liquid dampers. Considering the relative ease of design and installation, as well as the requirement of low initial and maintenance costs, passive dampers hold tremendous potential in providing a sustainable solution to the challenge of structural protection from environmental loading. The development of passive energy dissipation devices for civil engineering structures is a fast-expanding field with significant recent progress. This paper presents a state-of-the-art review of some of the more established passive dampers used for controlling structural vibration. Working mechanisms, design philosophies, advantages and shortcomings of these dampers are discussed. The applicability of the devices is also highlighted, along with a summary of their installations in real-life structures.
... Teruna and his team, in the same year, studied steel post-yield dampers for energy absorption. They also developed numerical models for post-yield steel plate dampers with rhombic-shaped holes to enhance energy absorption [17][18]. In 2015, Naeem and colleagues conducted a study on honeycomb nest bee steel dampers for seismic retrofitting of structures [19]. ...
This research investigates the explosive behavior of reinforced concrete frames retrofitted with wasp nest dampers. One effective solution for minimizing structural damage is the implementation of dampers, which function by absorbing energy and thereby reducing damage resulting from applied loads. One of the relatively recent damper types used is the wasp nest damper. Due to the limited knowledge regarding the explosive behavior of these dampers within concrete frames, this study aims to comprehensively address their behavior under explosive conditions. This investigation examines various parameters, including wall thickness, the arrangement of dampers in rows and columns, and their influence on the explosive behavior of frames retrofitted with these dampers. To achieve this objective, six models were analyzed in this research, and their results were validated using Abaqus software. In all models, an explosive load equivalent to a 50-kilogram TNT explosion at a distance of 3 meters from the structure was applied. The analysis involved the measurement of displacements and stresses and the generation of contour plots depicting tensile and compressive damage within the structure. The variables under scrutiny in this study encompassed the thickness of the wasp nest damper walls and the number of rows and columns. The obtained results demonstrate that using wasp nest dampers can significantly mitigate damage from explosive loads on the structure. Furthermore, it was observed that increasing the thickness, columns, and rows of wasp nest dampers can enhance their performance and effectiveness.
... The second and third dampers demonstrated an impressive damping capacity of approximately 50 %. Teruna et al. [6] tried to achieve a similar objective by performing an experimental study on four steel dampers that aim to protect structures from earthquake damage. Some of the dampers in the study demonstrated excellent energy dissipation abilities, stable hysteresis behavior, and high ductility factors. ...
Researchers have developed many passive damping devices to dissipate seismic energy using steel’s yielding property. Some proposed thick curved steel plates, while others proposed complex-shaped steel dampers. For instance, some have developed Shear Yielding Panel Devices (SYPD) and Triangular-plate Added Damping and Stiffness (TADAS) dampers for moment-resisting frames. However, these devices require additional steel bracings to be fitted into the structure. The present work reports an experimental study on a new energy dissipation device. The proposed damper is made of a steel plate cut into a curved shape (diaphragm), welded to flanges, and stiffened to create sub-panels. The damper can be fitted to the beam-column joints of steel structures using a bolted connection and does not need bracings; hence, it can be easily replaced after a seismic event. Eight devices were fabricated and tested under quasi-static cyclic loading protocol as per ATC 24. The results showed that all specimens exhibited hysteresis behavior, dissipated between 10 and 20 kJ of input energy, and provided a damping ratio of up to 40 %, depending on the damper’s geometry. Thus making it an effective seismic-resistant design system for new constructions and an alternative retrofitting tool for existing structures.
... Continuing the innovation trend, Teruna et al. [30] brought attention to a different approach with dampers made from mild steel plates featuring varied shapes on the sides. In their comparative analysis, a convex-shaped damper had higher energy dissipation, stable hysteresis, and high ductility. ...
In this study, results of an experimental program are presented to validate the performance of a novel energy dissipation device (EDD) designed for use in moment-resisting steel frame structures with flexible beam-column connections. The EDD, composed of a curved steel plate, stiffeners, and flanges on both ends, was tested in laboratory conditions using a displacement control quasi-static loading protocol. Three half-scale steel frames were used, one serving as a control and the other two incorporating the device in both column-beam joints. The device was fabricated using two different materials, mild steel, and stainless steel, and the results were compared. The results of the experimental program revealed that the frames equipped with the energy dissipation device performed significantly better than the control frame. This was observed qualitatively, in terms of the amount of damage sustained by the frames, and quantitatively, through measurements of the frames' capacity and displacement ductility. Frames that were equipped with dampers showed an approximately 1.5-fold increase in displacement ductility and an 84–113% increase in cumulative energy dissipation compared to the control frame. Overall, this research highlights the potential of this novel energy dissipation device to enhance the seismic performance of moment-resistance steel frame structures.
... One major disadvantage of the diamond shaped cut-out over the circular perforation was a larger stress concentration and, consequently, a higher probability of fatigue-like crack initiation under cyclic loading. The research by Kobori et al. [12], Chan and Albermani [13], Chan et al. [14&15], Teruna et al. [16], Lee et al. [17], Ahmadie Amiri et al. [18], and Li [19] can provide insight into the use of perforated plate connections as a source of energy dissipation in timber systems, even though these studies focused on steel structures. Based on testing and numerical analysis, recent works by Farzampour [20] on steel butterfly-shaped fuses demonstrated that these fuses enhance the seismic performance of concentrically and eccentrically steel braced frames. ...
... In this category, the specimens (Test No. [15][16][17][18] had the largest perforation size of 15 mm (compared to the dominant perforation size of 10 mm investigated in other categories) with either a 5 mm or 10 mm link size. All specimens had 3 rows of perforations. ...
Design of tall timber buildings in high seismic regions is still a challenge mainly due to lack of ductile connections, as a main component of Seismic Force Resisting System (SFRS). There are different methods to dissipate energy during major earthquakes including dissipation through yielding of steel material by going through plastic deformations, also called hysteresis energy dissipation. Under the induced seismic motions, such dissipative elements are intended to undergo excessive deformation whilst the rest of the structure remain intact with minimum damage. In this research, the focus is on the perforated steel plates as a dissipating energy device, also called seismic fuses, to enhance seismic performance of mass timber buildings during extreme earthquakes. Whilst the previous tests performed on such fuses demonstrated the potential of the concept to be used as different types of connections in the mass timber SFRS, their behaviour in cyclic loading can be improved. This chapter presents part of an extensive experimental study on perforated plate connections focusing on investigating the effect of various parameters such as number of rows of perforations, shape of perforations, size of perforations, steel plate thickness, and the steel link length between adjacent perforations. Thirty tests were performed in total, including 15 monotonic and 15 cyclic tests. Preliminary comparisons are made between the obtained hysteresis responses and their corresponding envelope curves versus the associated monotonic responses. It is shown that the ellipse and stagger patterns possess the largest ultimate displacement and stiffness, respectively. In addition, no significant enhancement is observed by adding more than four rows using a 5 mm perforation link size. Results of the perforated plate tests have shed light on the behaviour of the connection made of this plate type which will assist with the design of future test program on full-size mass timber connections consisting of such fuses.KeywordsCross-Laminated Timber (CLT) shear wallsTimber Braced Frame (TBF)Ductile connectionsStructural fusePerforated steel plate connectionSeismic Force Resisting System (SFRS)Link size
... Siam [16] established a reliable and efficient shock simulation method using FEA to analyze the high shock effects in space structures. Teruna et al. [17] checked the response of various steel dampers in the structure in case of an earthquake. Iqbal et al., [18] used the drop test machine to study the various types of shock pulses that are generated by the rubber wave generator. ...
Various types of mechanical energy-absorbing devices are known that operate by plastic deformation. The corrugated ring mount that is used in this study relates to a device that absorbs energy by plastic deformation. This energy-absorbing device has reduced volumetric proportions, simple in design, and therefore has small overall dimensions and can be mass-produced at low cost. This study aims to determine the shock absorption capability and efficiency of this mount against impact loading. For this, Finite Element Method Analysis (FEA) and experimentation are done. The FEA is done using the Explicit Dynamics (AutoDyn) module of ANSYS Workbench and for experimentation Drop Test Machine (DTM) is used. In this study impact load from low g up to 85 g is applied and a very close agreement is found between FEA and experimental results. There is just a 5-10% deviation between the findings. The results show that this mount is plastically deformed to absorb the impact energy with a maximum efficiency of 70%. It concludes that it is a reliable and safer shock energy device.
... In the same concept, Tsai et al. [110] proposed the TADAS damper, with a triangular shape, using the flexural deformation of metal plates under out-of-plane bending and exhibiting a similar hysteretic loop to the ADAS damper. Different shapes of the metallic plate have been proposed the in last years, such as the honeycomb damper [111] or the slit damper [112,113]. Bagheri et al. introduced a U-shape metallic yielding damper (UMYD) as an energy dissipation system in steel building frames and showed that it can be operated with large displacements in the inelastic range and dissipate energy through the plastic deformation of the steel [114,115]. ...
... Another damper consists of a combination of nested pipes that could change dynamic behavior parameters such as strength, In the same concept, Tsai et al. [110] proposed the TADAS damper, with a triangular shape, using the flexural deformation of metal plates under out-of-plane bending and exhibiting a similar hysteretic loop to the ADAS damper. Different shapes of the metallic plate have been proposed the in last years, such as the honeycomb damper [111] or the slit damper [112,113]. Bagheri et al. introduced a U-shape metallic yielding damper (UMYD) as an energy dissipation system in steel building frames and showed that it can be operated with large displacements in the inelastic range and dissipate energy through the plastic deformation of the steel [114,115]. ...
An extensive investigation of the international literature is carried out regarding the passive energy dissipation systems and more specifically the dampers that can be positioned in steel braces to increase the absorption of seismic energy and to protect them from buckling, such as Friction (FDs), Metallic (MDs), and Viscous dampers (VDs). This review paper systematically reviews/refers to 196 publications from the literature; it presents a brief overview of the steel braces frames and their problems. The efficacy of all of these types of dampers has been proved, as they have been used all around the world, and their comparison in experimental or numerical studies, applications, and optimization shows that there is no unilateral solution, as the appropriate selection of effective retrofit strategies takes into account parameters such as cost, duration, technical aspects, architectural needs, etc. Finally, the aim of this review paper is to systematically present an overview of passive energy dampers that can be installed on steel braces, summarize the advantages and the disadvantages of each one, compare global parameters such as the relation of velocity and damper force, economic details, and type of study, and facilitate future researchers working in the related field, for its better understanding and development
... They proposed a mathematical model. Teruna et al [11] investigated four steel damper specimens with specific geometry. They obtained energy absorption capabilities, hysteresis loop and stiffness in specimens. ...
... This general loading protocol is common for metallic damper. In this research mild steel plate was used with specifications that conform to JIS-SS400 [11]. The amount of yield stress, tensile strength and modulus of elasticity are 292, 456 and 2.06×10 5 MPa respectively. ...
... Also, the measured yield strain and elongation are 1.42×10 -3 and 16% respectively. Figure 3-b shows material strength curve [11]. Figure 3. a) The applied cyclic displacement loading protocol based on ATC-24 [15], b) Stress-strain curve obtained from a coupon test [11] 3. Finite Element Modeling procedure ...
N. Macedonia is a country characterized by relatively high seismic activity. As a consequence of its special tectonic regime, and quite frequent occurrence of damaging earthquakes, necessity for reliable seismic hazard and risk assessments are of outmost importance. Initial and one of the most important steps in PSHA is the seismic source characterization. Previously used seismic hazard models at the national level (Mihailov, 1978; Milutinovic et al., 1998; Dojcinovski, 2005; Stamatovska and Koytcheva, 2013; Salic, 2015; Milutinovic et al., 2016) consisted in areal type and/or gridded seismicity sources (Salic, 2015; Milutinovic et al., 2016), owing to the lack of seismogenic active fault parameters. All up to date available national (Basic Geological Map 1:100.000; Arsovski and Petkovski, 1975; Janchevski, 1987; Petkovski, 1992; Arsovski, 1997; Dumurdzanov et al., 2005; Drogreshka, 2018) and regional and European (EDSF13 and EFSM20) fault parametrization data were summarized and comparatively analysed. Three main declustered catalogues of earthquakes (National Seismological Observatory, BSHAP project, and ESHM20-Unified Earthquake Catalogue) for the territory of N. Macedonia and border region were also described and comparatively analysed. Histogram analysis related to different earthquake parameters were performed and compared together with the time completeness checks. As addition fault-plane solutions extracted from international or local seismic agencies concerning the studied region were analysed and systemised (Harvard CMT, INGV, EMEC, EPICA, BSHAP, Drogreshka, 2018). In this study, gaps and inconsistencies were drawn out from these data and alternative state-of-the-art methodologies were proposed to be used for seismogenic fault parametrization as a critical step towards reliable seismic hazard assessment.
... They proposed a mathematical model. Teruna et al [11] investigated four steel damper specimens with specific geometry. They obtained energy absorption capabilities, hysteresis loop and stiffness in specimens. ...
... This general loading protocol is common for metallic damper. In this research mild steel plate was used with specifications that conform to JIS-SS400 [11]. The amount of yield stress, tensile strength and modulus of elasticity are 292, 456 and 2.06×10 5 MPa respectively. ...
... Also, the measured yield strain and elongation are 1.42×10 -3 and 16% respectively. Figure 3-b shows material strength curve [11]. Figure 3. a) The applied cyclic displacement loading protocol based on ATC-24 [15], b) Stress-strain curve obtained from a coupon test [11] 3. Finite Element Modeling procedure ...
The purpose of this study is to investigate the seismic performance of a new type of yield metal dampers. Drilled plates are used in these metal dampers. These plates use holes with different diameters. Various drilling arrangement have also used to evaluate and improve the seismic performance of these types of dampers. For this study used a reference sample and 15 proposed models. The overall numerical results show that the proposed metal dampers have similar hysteretic curves. According to the hysteresis curves of drilled plate metallic damper (DPMD) under in-plane seismic loading; obtained mechanical parameters such as ductility ratio, initial stiffness, effective stiffness, total dissipated energy, dissipated energy in the last cycle, elastic strain energy, equivalent viscous damping (EVD) and equivalent plastic strain (EPS). Also, a formula is proposed to estimate the EVD value based on the ductility ratio of the proposed samples. The analytical results showed that the amount of stiffness, ductility ratio and equivalent viscous damping depends on the location and diameter of the holes. Also, the concentration of plastic strain between the holes increases the ductility ratio and EVD value of these types of dampers.
