Seismic Performance of a New Structural Design Solution for First-Story Isolated RC Buildings with Coupled Beam-Column Connections

Wu, Yingxiong; Liu, Ning; Ai, Qi

doi:10.3390/app9010177

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…In other words, the low-horizontal stiffness provides accommodation of deformation demands at the isolation interface, and the inherent/supplemental damping mechanism avoids the excessive deformation that might be detrimental (Figure 1). Accordingly, the SI system introduces flexibility to the designer for the installation of isolation units at the foundation, first floor [11], or any other convenient floor level in a building to directly account for the dissipation of earthquake-induced energy with feasible solutions (Figure 2). As a result of the adapted mechanism, anticipated floor accelerations and interstory drifts in the superstructure can reduce drastically.…”

Section: Fundamental Principles In the Design And Analysis Of Seismic...mentioning

confidence: 99%

Earthquake-Resilient Design of Seismically Isolated Buildings: A Review of Technology

Yenidogan

2021

Vibration

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Earthquake Seismic isolation plays an important role in achieving sustainable earthquake resilience communities. Seismic isolation method is a justified, mature, and reliable performance enhancement strategy for a wide range of structural systems and valuable contents. As a result of the targeted response modification, high-performance expectations and earthquake resilience can be achieved during the service life of the structures that are compliant with the design code requirements. Design and analysis procedures of isolation systems in standards were evolved substantially to expand the use of isolation technology and quantify the benefits of isolation systems to overcome the existing impediments. Strictly speaking, new tools are offered to the engineering community to highlight the possible issues that may appear in isolation units beyond the design basis earthquake level to improve the accuracy of response prediction. This paper aims to overview the characteristics of frequently used isolation systems in the industry with mathematical models, design criteria toward sustainable communities, the current state of practice along with the set forth design requirements of selectively well-known standards with special emphasis to the ELF procedure from the perspective of performance-based design philosophy. Additionally, two large-scale seismic isolation applications in the world are given as benchmark studies for the new construction and upgrading scheme in the content of the study.

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Section: Fundamental Principles In the Design And Analysis Of Seismic...mentioning

confidence: 99%

Earthquake-Resilient Design of Seismically Isolated Buildings: A Review of Technology

Yenidogan

2021

Vibration

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“…To continue the research on a frame structure with a weak first story of the author’s research group, a same structure is established (Wu et al, 2019). The prototype building had a seven-story RC-framed structure.…”

Section: Numerical Analysismentioning

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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“…Meanwhile, due to the excellent performance of isolation technology, many different isolation devices (e.g., rubber isolation bearings, lead rubber isolation bearings, friction pendulum bearings, etc.) are used in buildings and bridges [5][6][7][8][9][10][11][12][13][14][15]. However, passive isolation also has many disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Semi-Active Control of Base Isolation System Using Magnetorheological Dampers for Concrete Frame Structure

Wei-qing

Zhang

et al. 2019

Applied Sciences

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The traditional passive base isolation is the most widely used method in the engineering practice for structural control, however, it has the shortcoming that the optimal control frequency band is significantly limited and narrow. For the seismic isolation system designed specifically for large earthquakes, the structural acceleration response may be enlarged under small earthquakes. If the design requirements under small earthquakes are satisfied, the deformation in the isolation layer may become too large to be accepted. Occasionally, it may be destroyed under large earthquakes. In the isolation control system combined with rubber bearing and magnetorheological (MR) damper, the MR damper can provide instantaneous variable damping force to effectively control the structural response at different input magnitudes. In this paper, the control effect of semi-active control and quasi-passive control for the isolation control system is verified by the shaking table test. In regard to semi-active control, the linear quadratic regulator (LQR) classical linear optimal control algorithm by continuous control and switch control strategies are used to control the structural vibration response. Numerical simulation analysis and shaking table test results indicate that isolation control system can effectively overcome the shortcoming due to narrow optimum control band of the passive isolation system, and thus to provide optimal control for different seismic excitations in a wider frequency range. It shows that, even under super large earthquakes, the structure still exhibits the ability to maintain overall stability performance.

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Seismic Performance of a New Structural Design Solution for First-Story Isolated RC Buildings with Coupled Beam-Column Connections

Cited by 7 publications

References 34 publications

Earthquake-Resilient Design of Seismically Isolated Buildings: A Review of Technology

Earthquake-Resilient Design of Seismically Isolated Buildings: A Review of Technology

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

Experimental Investigation on Semi-Active Control of Base Isolation System Using Magnetorheological Dampers for Concrete Frame Structure

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