Performance of high-damping rubber bearings for seismic isolation of residential buildings in Turkey

Murota, Nobuo; Suzuki, Shigenobu; Mori, Takahiro; Wakishima, K.; Şadan, Bahadır; Tüzün, Cüneyt; Sütçü, Fatih; Erdik, Mustafa

doi:10.1016/j.soildyn.2021.106620

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…The HDRBs exhibit excellent energy dissipation capacity. When subjected to seismic excitation, the bearings can effectively dissipate a significant portion of the seismic energy transmitted to the structure, thereby reducing structural damage 14,64 . Among various forms of energy dissipation, the hysteretic energy dissipation of both the HDRBs and the superstructure is particularly noteworthy.…”

Section: Time‐history Analysis Resultsmentioning

confidence: 99%

Assessing the significance of nonlinear rotational behavior in high damping rubber bearings for seismic performance of base‐isolated RC frame building

Li,

Yang,

Dai

et al. 2024

Earthq Engng Struct Dyn

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Utilizing high‐damping rubber bearings (HDRBs) for seismic isolation significantly enhances building seismic performance. However, previous studies have often neglected the nonlinear rotational behavior of these bearings when assessing base‐isolated systems using HDRBs. This study introduces two numerical models of the HDRBs, each comprising six springs. The first model, referred to as the BIL model, assumes linear behavior for the rotational degrees of freedom of the bearings. The second model, referred to as the BINL model, accounts for the nonlinear rotational behavior. The parameters of the bearing shear springs and the rotational springs of the two models are calibrated using experimental data. In order to investigate the influence of nonlinear rotational behavior of HDRBs on the seismic performance of base‐isolated buildings, nonlinear time history analysis is conducted on a six‐story base‐isolated RC frame building. Comparative analysis between the BIL model and the BINL model covers bearing behavior, superstructure response, and energy dissipation distribution. Results indicate a significant influence of considering nonlinear rotational behavior on column bending moments. These findings provide crucial insights for enhancing seismic design strategies for base‐isolated buildings.

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Section: Time‐history Analysis Resultsmentioning

confidence: 99%

Assessing the significance of nonlinear rotational behavior in high damping rubber bearings for seismic performance of base‐isolated RC frame building

Li,

Yang,

Dai

et al. 2024

Earthq Engng Struct Dyn

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“…In order to assess the mechanical properties of different prototypes, a comparison in terms of equivalent stiffness and damping for different deformation levels is given in Figure 4. The effective lateral stiffness, K h , of the devices was calculated based on the peak-to-peak lateral response for each deformation cycle, as shown in Equation (1), where F max and F min are the maximum and minimum values of the force during each cycle, and D max and D min are the corresponding displacement. The equivalent damping ratio, β, was estimated as a function of the dissipated area, E b , during each deformation cycle, as given in Equation (2).…”

Section: Fiber-reinforced Elastomeric Isolatorsmentioning

confidence: 99%

“…Seismic isolation played an important role over the last decades, with proven performance during the Kobe earthquake of 1995 and during earthquakes in a number of other countries. 1 A significant research has been recently focused on developing low-cost seismic isolation systems for countries where the use of these systems has been limited. Particularly, fiber-reinforced elastomeric isolators (FREIs) without connections (unbounded) have been developed as a convenient option for applications with budget limitation or technological constraints.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Real‐time hybrid simulations including rocking effects: The case of a frame‐structure with unbounded elastomeric isolators

Riascos

Klopov

Losanno

et al. 2022

Structural Contr & Hlth

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Real‐time hybrid simulations (RTHS) have become an attractive alternative for the study of structural systems by conveniently separating an experimental substructure from a numerical component. Due to the technical and economic benefits of applying fiber‐reinforced elastomeric isolators (FREIs) in unbounded configuration, the analysis of this device using RTHS is gaining interest among researchers. However, there are aspects associated with the complexity of the unbounded isolators that alter the dynamic behavior of the structure. One of these aspects is the rocking effect, which generally is disregarded when conducting RTHS. This paper addresses the role of rocking effects in the representation of isolated structures through RTHS. The results of different RTHS architectures show that when rocking is not taken into account, the base displacement and interstory drifts can be underestimated by more than 50%. Results from the RTHS are compared to shaking table tests (STTs) of a mock‐up structure isolated with unbounded FREIs, with a maximum error less than 8% in peak and root‐mean‐square values of displacement and force.

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“…They discovered that the seismic isolation scheme could reduce both the displacement and absolute acceleration responses of the structure, which has obvious benefits in reducing the economic losses from earthquakes. Murota et al [19] used numerical and experimental methods to explore the suitability of high damping rubber bearings in the seismic isolation of residential buildings in Turkey, evaluating the seismic response of the buildings and determining the efficacy of the seismic isolation system. Sung et al [20] proposed incorporating an elliptical member equipped with a rubber cylinder in a portal reinforced concrete frame and conducted shaking table tests, which showed that the proposed strengthening method could not only restore the seismic capacity, but also improve the seismic resistance of the reinforced concrete frame damaged by the earthquake.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance and Optimization of a Novel Partial Seismic Isolation System for Frame Structures

Chen¹,

Qiu²,

Xiong³

et al. 2022

Buildings

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To improve the safety performance of important rooms, such as operating rooms and disaster command centers, during an earthquake, a novel partial seismic isolation system suitable for new and existing frame structures is proposed, and the seismic and optimization analysis is carried out. Using the finite element numerical simulation method, the models of the ordinary frame structure and the partial isolated system structures were established. Considering the seismic response of the isolation room, the design safety of the partial isolation room, and the seismic impact on the overall structure, this study analyzed the damping effect of the partial isolation system. We changed the type of isolation bearing, the location of the isolation room, and the load to further optimize the calculation of the seismic isolation structure. The results show that the new partial isolation system could significantly reduce the seismic response of the isolated room under the action of a magnitude-8 rare earthquake. The damping rate of the relative acceleration and relative displacement between the top and bottom of the columns of the isolated room could reach 90%. It was found that the partial seismic isolation system proposed in this paper was applicable to reinforced concrete frame structures and could significantly reduce the seismic response of the isolated rooms without affecting the seismic performance of the main building. This partial seismic isolation system is easy to construct, applicable to both existing and new structures, and provides a new and effective seismic mitigation measure to improve the seismic performance of locally important rooms in the structure.

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Performance of high-damping rubber bearings for seismic isolation of residential buildings in Turkey

Cited by 20 publications

References 9 publications

Assessing the significance of nonlinear rotational behavior in high damping rubber bearings for seismic performance of base‐isolated RC frame building

Assessing the significance of nonlinear rotational behavior in high damping rubber bearings for seismic performance of base‐isolated RC frame building

Real‐time hybrid simulations including rocking effects: The case of a frame‐structure with unbounded elastomeric isolators

Seismic Performance and Optimization of a Novel Partial Seismic Isolation System for Frame Structures

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