Modal property of base-isolated high-rise structure considering soil–structure interaction effect

Du, DS; Wang, SG; Liu, WQ; Shi, Sheng; Lee, CP; Xu, Jun

doi:10.1177/1687814018803808

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…Base-isolation system is an effective technique to reduce the vibration response of the structures subjected to seismic excitation. In the article by Du et al, 1 ''Modal property of base-isolated high-rise structure considering soil-structure interaction effect,'' the authors proposed a simplified methodology to analyze the modal properties of base-isolated high-rise structures with dynamic soil-structure interaction (SSI) effects. The work is founded on a two degree-of-freedom (DOF) model, and is supported by swaying and rocking springs (and dashpots).…”

Section: Discussionmentioning

confidence: 99%

Numerical simulation of large-scale structural systems

Hariri-Ardebili

Furgani

Salamon

et al. 2019

Advances in Mechanical Engineering

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Section: Discussionmentioning

confidence: 99%

Numerical simulation of large-scale structural systems

Hariri-Ardebili

Furgani

Salamon

et al. 2019

Advances in Mechanical Engineering

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“…flexible, laminated rubber bearings) inserted between a floor and the supporting columns, forming the first-story column-top isolation structure (Matsagar and Jangid, 2008). Compared to a base isolation retrofit (Awwad and Donia, 2016; Bhagat and Wijeyewickrema, 2017; Chopra, 1995; Du et al, 2018; Jangid, 2002), a column-top isolation retrofit eliminates the need for an additional diaphragm and seismic gap, thus reducing project cost and alleviating the problem of abrupt changes in stiffness and shear stress between the first story and its above superstructure (Palermo et al, 2014; Wibowo et al, 2010). This shortcoming could result in severe damage, and failure, to buildings under earthquake excitations.…”

Section: Introductionmentioning

confidence: 99%

Seismic response analysis of a first-story isolated reinforced concrete frame building with independent columns

Lin

2020

Advances in Structural Engineering

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This study aims to better understand the seismic responses and isolation effect of a first-story, independent, column-top isolation structure with concrete frames. A series of shaking table tests and a numerical simulation were performed on a seven-story reinforced concrete–framed structure with first-story isolation, using rubber bearings. A non-isolated, structural model was used as a reference for comparison. The testing and numerical results showed that the story acceleration and inter-story displacement of the superstructure in the isolation model were significantly reduced, indicating the good damping effect of the isolation system. This system, which composed of rubber bearings, could absorb most of the seismic energy. The inter-story displacement of the substructure in the isolation model was also significantly reduced, while the acceleration was slightly reduced. The horizontal deformation of the column was not severe, and the seismic capacity of the substructure was higher than that of the superstructure. It is suggested that to guarantee the seismic security of reinforced concrete–framed structures with the first-story column-top isolation under extremely rare strong earthquakes, the stiffness of columns in the substructure should be further strengthened. Moreover, it is effective and reasonable to adopt the first-story column-top isolation method to improve the seismic capacity of reinforced concrete–framed structures with a weak first story.

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“…Moreover, Nakai et al [24] investigated changes in stiffness of the base-isolated layer and the superstructure of the high-rise seismic isolated building with respect to different levels of seismic excitation amplitude. Furthermore, Du et al [25] proposed the simplified method of modal evaluation of base-isolated high-rise structures considering the soil-structure interaction effects.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response of High-Rise Buildings Equipped with Base Isolation and Non-Traditional Tuned Mass Dampers

et al. 2019

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One of the methods in structural control is the application of combinational control systems in order to reduce the response of structures during earthquakes. The aim of the present paper is to verify the effectiveness of a hybrid control strategy, combining base isolation and non-traditional tuned mass dampers (TMDs) (i.e., TMDs with dashpots directly connected to the ground) in suppressing structural vibrations of high-rise buildings. The study was conducted for structures with a different number of stories exposed to various far-field and near-field earthquake records. Multi degree-of-freedom models of buildings as well as non-linear models of the base isolation system were employed in the analysis. The results of the study clearly confirmed that the response of high-rise buildings during earthquakes could be significantly reduced using base isolation devices and non-traditional TMDs. They showed also that the effectiveness in suppressing structural vibrations substantially depends on the type of the control system used. The influence of the base isolation in the reduction of structural response under different earthquake records was much larger than the influence of non-traditional TMDs. In the case of buildings analyzed in the study, the application of TMDs alone resulted in a reduction not larger than 20%, as compared to the response without any system. On the other hand, the response of buildings equipped with only base isolation devices was reduced by more than 70% under different ground motions. However, the largest reductions (larger than 80%) were obtained for the cases when both control systems (base isolation and non-traditional TMDs) were used simultaneously.

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Modal property of base-isolated high-rise structure considering soil–structure interaction effect

Cited by 8 publications

References 15 publications

Numerical simulation of large-scale structural systems

Numerical simulation of large-scale structural systems

Seismic response analysis of a first-story isolated reinforced concrete frame building with independent columns

Seismic Response of High-Rise Buildings Equipped with Base Isolation and Non-Traditional Tuned Mass Dampers

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