Seismic performance of an innovative structural system having seesaw motion and columns equipped with friction dampers at base level

Hosseini, Mahmood; Fekri, Mohammadreza; Yekrangnia, Mohammad

doi:10.1002/tal.1286

Cited by 10 publications

(5 citation statements)

References 17 publications

(22 reference statements)

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“…Actually, the majority of gravity loads is carried by the GOSG, and its girders can be of plate girder type, Vierendeel truss type, or just truss type. In case of seesaw building, the strong floor is resting on a CMS, as the main support for tolerating the gravity loads as well as the horizontal component of earthquake forces, of which one type is shown in Figure 4, suggested by Hosseini et al [ 49 ] in a previous study on seesaw buildings. Some other types of CMS for seesaw buildings can be found in that study or other previous works of Hosseini and Kherad [ 19 ] or Hosseini and Ghorbani Amirabad, [ 20 ] as shown in Figure 1.…”

Section: Cyped Its Features and Its Usage In Seesaw And Rocking Buimentioning

confidence: 99%

Experimental study on a novel replaceable yielding‐based energy dissipater for rocking and seesaw buildings

Kherad

Hosseini

Motamedi

2020

Structural Design Tall Build

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Summary The use of energy dissipaters for creation of earthquake‐resilient buildings has been paid more and more attention in recent years, and some newly developed structural fuses or dampers have been proposed to be employed in rocking and seesaw buildings. In this study, a new type of yielding‐based dampers, called curved‐yielding‐plates energy dissipater (CYPED), is introduced. CYPEDs are installed at the bottom of rocking or seesaw building's circumferential columns at the lowest story and have hysteretic behavior in their deformation occurring in vertical direction. The initial curvature of the yielding plates prevents them from buckling and gives the device a smooth force–deformation behavior. First, by performing a set of cyclic tests on three specimens of CYPED, their hysteretic force–displacement behavior was investigated. Then, to show the efficiency of this energy dissipating device in reducing the seismic response of buildings, they were employed numerically as multilinear plastic springs in the computer models of a sample seesaw steel building, and a series of nonlinear time history analysis (NLTHA) were performed on both seesaw building and its conventional counterpart. Results of NLTHA show that the proposed seesaw structural system equipped with appropriate CYPEDs not only gives the building a longer natural period, leading to lower seismic demand, but also leads to remarkable energy dissipation capacity in the building structure at base level and, therefore, keeping the seismic drifts in elastic range in all stories of the building. In this way, the building structure does not need any major repair work, even after a large earthquake, while the conventional building suffers from heavy damage and is not usable after the earthquake.

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Section: Cyped Its Features and Its Usage In Seesaw And Rocking Buimentioning

confidence: 99%

Experimental study on a novel replaceable yielding‐based energy dissipater for rocking and seesaw buildings

Kherad

Hosseini

Motamedi

2020

Structural Design Tall Build

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“…Zhang et al used a liftable pile foundation with friction dampers to effectively consume the seismic energy. Hosseini adopted friction telescopic columns and equipped the friction dampers at the ground floor of the buildings, as the main energy dissipating part of the seismic resistant system. The above technologies have better seismic reduction effect, whereas the structural forms were more complex.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of high‐rise building with a rock‐slip isolation system with cables

Zhang

Yin

Chen

et al. 2020

Structural Design Tall Build

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To avoid the overturning hazard of high-rise buildings with traditional isolation technology, a rock-slip structure with cables (RSSC) was proposed to improve their seismic performance. The mechanical model was established, and the motion behaviour equation of the RSSC was derived. Shake-table tests of the RSSC were performed, and the results were compared with the corresponding finite-element model simulations. The influences of key structural parameters and earthquake motion characteristics were analysed. The study results showed that the RSSC could effectively reduce the internal seismic force response and interlayer deformation under a severe earthquake, as well as decrease the overturning probability. The seismic reduction effect was influenced by the prestressed force, the aspect ratio of the structure, and the friction coefficient between the superstructure and foundation as well as seismic site type. The motion equation derived in this paper can be used to theoretically predict the motion behaviour of RSSC. K E Y W O R D Sdynamic response, high-rise building, rock-slip, seismic isolation, seismic reduction rate, shaketable test | INTRODUCTIONWith the deepening cognition of the nature of earthquake disasters, structural seismic design has evolved from the initial simple seismic resistant designs to seismic ductility designs and isolation designs. By appropriately prolonging the structure's natural vibration period to avoid sitepredominant periods, increasing damping to dissipate seismic energy, and isolating ground motion, the seismic response of the structure may be reduced. The technology of seismic isolation has been widely applied and popularized due to its good seismic reduction effect and the convenience of repair after a disaster. For middle-and low-rise structures, the installation of rubber bearings and tuned mass dampers can effectively reduce the seismic response, [1][2][3] but studies by Itoh and Gu [4] and Liu et al. [5] have also shown that the performance of rubber bearings are significantly affected by temperature changes. Additionally, for high-rise structures, [6][7][8] rubber bearings will lose function in instances of severe earthquakes, specifically when the height-width ratio is over a certain value (which is affected by the site type and earthquake degree). [9] Moreover, the entire inclination angle of a high-rise structure increases, and its integral anti-overturning performance decreases, with an increase in the height-width ratio after isolation, which can easily cause overturning, endangering adjacent buildings. [10,11] Therefore, the application of traditional seismic isolation technology in high-rise structures is not ideal. A new isolation system needs to be proposed with the development of highrise buildings, which could not only reduce the earthquake response but also effectively reduce the possibility of overturning, and easy to repair after an earthquake.Research into rocking structures can be traced back to the 19th century. [12] Subsequently, Housner [13] found that for ...

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“…Tremblay and colleagues studied seismic retrofit of existing low-rise steel buildings in eastern Canada using rocking braced frame system [12]. Also Hosseini and colleagues introduced a kind of seesaw building with friction dampers in columns at the lowest story [13], and Khalkhali and colleagues studied partitioned rocking buildings [14], and also Hosseini and Nejati worked design of repairable regular steel buildings with square plan based on seesaw motion of building structure and using double ADAS (DADAS) dampers [15].…”

Section: Introductionmentioning

confidence: 99%

A study on the behavior of structures based on the rocking motion of rigid cores involving pre-compressed springs and viscous dampers

Legzian¹,

Hashemi²,

Hosseini³

2019

J. vibroeng.

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To create a partial rocking mode in a building structure during an earthquake, two or more rigid cores with joint connection to the foundation, and capable of moving in the two main directions of the building's plan, can be used. A rigid core with a hinge connection to the foundation is essentially unstable. However, two rigid cores can be connected together by springs and dampers in certain floors to create a stable structure. At the same time, the structure shows a rocking behavior in which the building moves almost as a rigid body. In fact, the effects of all modes other than the fundamental one is almost eliminated. The use of yielding or friction dampers leads to permanent displacements in the structure in an earthquake. Therefore, in this study pre-compressed springs were employed, which do not create any permanent displacement. The pre-compressed springs were used to provide the structure with initial stiffness and prevent any displacement by small forces. Since an elastic spring does not have any damping, it was decided to control the structural displacements by viscous dampers in certain floors. Finally, the proposed structure underwent static and time-history analyses in plastic range, and the results suggested the desirable behavior of the proposed structure. In particular, there were no permanent displacements left in the structure after the earthquake.

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Seismic performance of an innovative structural system having seesaw motion and columns equipped with friction dampers at base level

Cited by 10 publications

References 17 publications

Experimental study on a novel replaceable yielding‐based energy dissipater for rocking and seesaw buildings

Experimental study on a novel replaceable yielding‐based energy dissipater for rocking and seesaw buildings

Seismic performance of high‐rise building with a rock‐slip isolation system with cables

A study on the behavior of structures based on the rocking motion of rigid cores involving pre-compressed springs and viscous dampers

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