Hybrid base-isolation of a nonlinear building using a passive resettable stiffness damper

Walsh, Kenneth K.; Sallar, Grace; Steinberg, Eric P.

doi:10.1016/j.engstruct.2018.10.037

Cited by 8 publications

(10 citation statements)

References 17 publications

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“…In the following sections of the paper, it will be shown that the PNSD component can be designed to achieve approximately constant negative stiffness over a target structure displacement. Meanwhile, details on the RPSD component of the D‐BASED system have already been reported in previous studies by the authors, 21,23,52 and design of resettable stiffness dampers to achieve a desired effective stiffness has been reported elsewhere in the literature 13 . As a result, these details have been omitted from the paper.…”

Section: Displacement‐based Adjustable Stiffness and Energy Dissipation Systemmentioning

confidence: 99%

“…The RPSD was constructed using a pneumatic cylinder containing air initially at atmospheric pressure, and its effective stiffness was determined experimentally to be k rs = 0.77 N/mm. More details on the RPSD can be found in the literature 21,23 . The PNSD consisted of two circular bars pinned together at one end, with their opposite ends pinned to linear guides.…”

Section: Experimental Validation Of a Prototype D‐based Systemmentioning

confidence: 99%

“…Recent research also indicates that the RPSD is effective for seismically excited short‐period structures when motion amplification is incorporated into the resetting mechanism 22 . Finally, the RPSD was shown to be effective in reducing the response of a nonlinear base‐isolated building, where its performance was compared to that of other passive and semi‐active damping systems 23 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Resetting passive stiffness damper with passive negative stiffness device for seismic protection of structures

Walsh

Sallar

Haftman

et al. 2021

Struct Control Health Monit

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Summary The objective of the present study is to investigate a new energy dissipation system that combines the positive stiffness of the resetting passive stiffness damper (RPSD) with the negative stiffness of a passive negative stiffness device (PNSD). The displacement‐based adjustable stiffness and energy dissipation (D‐BASED) system can be designed to have independent damper stiffness and energy dissipation. Equations for modeling the RPSD and PNSD components of the D‐BASED system are presented, along with an approach for designing the PNSD component. The results of laboratory experiments on a small‐scale prototype D‐BASED system are provided for validation of the concept. Numerical simulations are performed for the D‐BASED system installed in the isolation layer of a five‐story base‐isolated building subject to a suite of near‐field earthquake ground motions. The performance of the D‐BASED system with the same net stiffness, but different levels of energy dissipation, is compared with that of the RPSD alone. It is shown that increasing the RPSD‐ and PNSD‐component stiffness in the D‐BASED system results in a reduction in the peak base drift compared to the RPSD, while limiting the building story drifts. Furthermore, it is shown that increasing the RPSD‐ and PNSD‐component stiffness generally does not lead to an increase in the peak total force transmitted to the foundation. The D‐BASED system is also found to yield smaller peak story drifts and foundation forces compared to a passive linear fluid viscous damper for a long‐period base‐isolated building.

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Section: Displacement‐based Adjustable Stiffness and Energy Dissipation Systemmentioning

confidence: 99%

Section: Experimental Validation Of a Prototype D‐based Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Resetting passive stiffness damper with passive negative stiffness device for seismic protection of structures

Walsh

Sallar

Haftman

et al. 2021

Struct Control Health Monit

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“…Resetting semi-active stiffness damper has been studied and results show the effectiveness of this damper in reducing the structural control for the near field earthquake as stated in the article [88]. Resetting semiactive stiffness dampers was replaced by a novel mechanism to form resetting passive stiffness damper which is used for the base isolation of a nonlinear building subjected for near field earthquake in [89].…”

Section: Semi-active Stiffness Control Devicesmentioning

confidence: 99%

“…In the other hybrid base isolation systems used in the article [107], isolators were used for the system between the foundation and the base and an active tendon system is used in the superstructure. A study was conducted in the article [89] to compare the effect of different passive dampers, semi-active dampers and a hybrid seismic protective system like a passive viscous fluid damper, passive friction damper, resetting semi-active stiffness damper and resetting passive stiffness damper as shown in Fig. 13.…”

Section: Hybrid Base-isolation Systemsmentioning

confidence: 99%

Review on vibration control in tall buildings: from the perspective of devices and applications

Kavyashree

Patil

Rao

2020

Int. J. Dynam. Control

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Permanent construction has evolved from the Palaeolithic age to today’s skyscrapers. Constructing the structure, which promises occupants safety, has become a concern because of the uncertainties in nature. Therefore in recent years, attention has been given to the development of structural protective devices that could take care of the external loads. Structural control against the wind and earthquake load has been seriously studied where the structure behaves differently for wind and earthquake load has been briefly discussed in this paper. Initially, paper discusses the history of the construction and the passive control system, which was used in structural control, is briefly discussed in this paper. Also, the implementation of active control has been discussed which was introduced later in the structural control for more effective control. But the limitations of the passive and active control system have introduced semi-active control and also the hybrid control strategy. The two mechanisms are put together in the semi-active and hybrid system to obtain all advantages of the algorithm along with overcoming their limitations. The review also briefs about stochastic vibrational control of the structure where randomness is considered in external loads, parameter of the system and also in the external devices which are implemented in the structural control. As construction sector is a complex system, big data analysis, a new field in structural control system is discussed and future scope is also mentioned.

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Experiment investigation and seismic performance evaluation of hybrid isolation bearing with uncoupled compression and shear mechanism

Liu

et al. 2021

Structural Design Tall Build

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Summary Lead rubber bearings (LRBs) are widely used in the seismic isolated structures. However, the lateral and vertical stiffness of rubber bearing would degrade under high pressure and larger shear strain, which has influence on the structural safety under great earthquakes. This paper proposes a novel hybrid isolation bearing (HIB) with uncoupled compression and shear mechanism. The HIB consists of sliding bearing and rubber springs, carrying superstructural weight and providing lateral stiffness, respectively. The configuration and mechanical model of the HIB are introduced, and an experiment investigation on two sizes of HIB was completed. Through the model test, the deformation mechanism and the mechanical model were verified. A numerical simulation of a frame–shear wall structure was performed, and the variation of structural responses is illustrated. Compared with conventional LRB isolated structure, the HIB isolated structural has similar response variations under earthquakes from frequent to rare levels. Under extremely rare earthquakes, the HIB has more stable mechanical behavior.

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Hybrid base-isolation of a nonlinear building using a passive resettable stiffness damper

Cited by 8 publications

References 17 publications

Resetting passive stiffness damper with passive negative stiffness device for seismic protection of structures

Resetting passive stiffness damper with passive negative stiffness device for seismic protection of structures

Review on vibration control in tall buildings: from the perspective of devices and applications

Experiment investigation and seismic performance evaluation of hybrid isolation bearing with uncoupled compression and shear mechanism

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