Simplified procedures for seismic design verification and evaluation of lead rubber bearing base‐isolated buildings based on free‐vibration response

Lu, Yang; Song, Jin Dea; Xiong, Feng; Dai, Kaoshan; Zhou, Guangxin; Mingyu, Wei; Zhang, Shiming

doi:10.1002/tal.1751

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Base isolation is appropriate, primarily under the following conditions [ 31–33 ] : Low‐ to medium‐rise structures situated over stiff strata. Strata that do not exhibit long‐period predominant excitations. Large displacement capacity at the isolation level. …”

Section: Developing the Model For Analysismentioning

confidence: 99%

Response control analysis of a new mega‐subcontrolled structural system (MSCSS) under seismic excitation

Shahzad

Zhang

Wang

et al. 2022

Structural Design Tall Build

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The mega-subcontrolled structural system (MSCSS) was proposed in the past decade as a new construction technique for high-rise buildings because it showed an improved structural seismic response. However, research continues to focus on further increasing the response control ability, minimizing the cost, and improving the seismic performance of MSCSS. In this paper, a novel configuration named configuration 13 is proposed that incorporates an inverted V-bracing (chevron) along the height in the center of the structure, and a mid-story isolation system is situated under the first mega-beam. The response control analysis and dynamic characteristics of the novel MSCSS are studied based on the structural responses to seven seismic waves. This novel configuration shows a significant improvement of at least 30.58% in the structural acceleration response with an average overall improvement of 49.7% under an El Centro wave. Moreover, nonlinear dynamic analysis is performed under the same seven waves; the proposed configuration shows the maximum pseudo-spectral acceleration under the El Centro input at low frequencies, while under the Kobe wave, acceleration peaks also appear at higher frequencies. Furthermore, the Hilbert-Huang transform is also applied, confirming that the proposed MSCSS shows no sudden fluctuations in its structural response under seismic excitation.

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Section: Developing the Model For Analysismentioning

confidence: 99%

Response control analysis of a new mega‐subcontrolled structural system (MSCSS) under seismic excitation

Shahzad

Zhang

Wang

et al. 2022

Structural Design Tall Build

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show abstract

“…SBTs are seldom performed on real structures [43][44][45] since they require an important equipment to be constructed for the application of forces, which is often difficult to place in situ, with high costs, and also because this kind of test should be carefully designed to avoid possible damage to structural or non-structural components. However, the excitation level provided to the structure is similar to that provided by low-and medium-intensity earthquakes, which can occur during the life of buildings in earthquake prone areas.…”

Section: Dynamic Tests During the Infill Damagementioning

confidence: 99%

Detection of infill wall damage due to earthquakes from vibration data

Nicoletti

Arezzo

Carbonari

et al. 2022

Earthq Engng Struct Dyn

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Vibration‐based methodologies are nowadays gaining increasing application for the structural health monitoring and damage detection on buildings, especially damage due to earthquakes. A fast and efficient damage recognition on structural and non‐structural components can support the decision‐making process after exceptional events and may contribute to reduce troubles due to the inoccupancy of buildings. The paper offers insights on the usefulness of vibration data for the damage detection in infilled frame structures starting from the tracking of the stiffness and modal properties of an infilled laboratory steel‐concrete composite mock‐up subjected to vibration‐based tests. The mock‐up has been object of an extensive experimental campaign that involved both quasi‐static cyclic and dynamic tests characterized by different level of excitation provided to the structure. Cyclic load tests are performed to simulate the effects of earthquakes by progressively increasing the imposed displacement to the cracking and then to the failure of infills. The dynamic tests are executed at the various steps to capture the effects of the infill damage on the global dynamic response triggered by excitations of different amplitudes. Results of dynamic and quasi‐static tests are used to correlate the infill damage with the mechanical properties and the modal parameters of the mock‐up, as well as with the vibration amplitude, providing information about the damage expected during low and moderate seismic events as a function of the registered dynamic response of the building by structural health monitoring systems.

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“…Rubber isolation bearings not only ensure the stability of the superstructure, but also effectively release stress.Park et al studied the dynamic performance of lead-rubber bearings and lead-free rubber bearings under seismic isolation, and found that the seismic performance of lead-free rubber bearings is due to the absence of lead-free rubber bearings. They also analyzed the dynamic response characteristics of lead-free bearings under horizontal and vertical seismic excitations [3].Similarly, Jamalvandi et al conducted a comparative study on lead rubber bearings and non lead rubber bearings for storage tanks and found that lead rubber bearings have high isolation efficiency [4].Lu et al developed a simplified method for verifying the free vibration response of lead rubber bearings and linear natural rubber bearings in isolation design and seismic demand assessment, and obtained corresponding formulas [5]. Cao et al proposed a lead rubber isolation bearing for multi-stage composite bridges that meets specific performance under different levels of seismic hazards to ensure isolation efficiency and limit the ability of bearings to move too much under different seismic effects.…”

Section: Introductionmentioning

confidence: 99%

Research on seismic isolation performance of nuclear power plant containment structures

Xue,

Cui,

Pei

et al. 2024

Preprint

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Non isolated structures have problems such as strong destructiveness and poor isolation effect when encountering earthquakes. Setting isolation bearings can extend the natural vibration period of the structure, reduce the horizontal seismic response of the structure, and also enhance the overall seismic performance of the structure.The new material - epoxy plate thick layer rubber isolation bearing has unique advantages compared to other bearings, such as effective energy absorption, simple construction, and low cost.This study establishes a three-dimensional isolated nuclear power plant containment structure based on the principle of similarity ratio, and compares and analyzes the acceleration, base reaction, and displacement responses of non isolated and isolated structures. At the same time, the incremental dynamic analysis method (IDA) is used to analyze the seismic vulnerability of the structure, and the isolation performance of the nuclear containment structure using epoxy plate thick layer rubber isolation bearings is comprehensively and deeply explored.The results show that the epoxy plate thick layer rubber isolation bearing effectively prolongs the natural vibration period of the structure, reduces the horizontal seismic response of the structure, and reduces the dome acceleration response by 66.55%, and the base horizontal shear force by 55.51%.Therefore, setting epoxy plate thick layer rubber isolation bearings in the isolation layer can effectively enhance the seismic performance of the structure, thereby improving the redundancy of the nuclear power plant containment structure. Keywords: epoxy plate thick layer rubber isolation bearing; Time history analysis; Seismic performance; Incremental dynamic analysis method.

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Simplified procedures for seismic design verification and evaluation of lead rubber bearing base‐isolated buildings based on free‐vibration response

Cited by 5 publications

References 24 publications

Response control analysis of a new mega‐subcontrolled structural system (MSCSS) under seismic excitation

Response control analysis of a new mega‐subcontrolled structural system (MSCSS) under seismic excitation

Detection of infill wall damage due to earthquakes from vibration data

Research on seismic isolation performance of nuclear power plant containment structures

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