Seismic Isolation Research on a Double-Layer lattice Structure Using Shaking Table Tests

Zhang, Chen-xiao; Nie, Gui-bo; Liu, Kun; Zhi, Xu; Ma, Hongwei

doi:10.1007/s13296-019-00204-8

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…Notwithstanding the exceptional structural performance, it is worth noting that large-span spatial roofs may experience significant structural damage when subjected to certain seismic events, wind loads, and fluctuations in temperature [1]. To avoid the damage, a careful assessment of the structural load [2][3][4], and a precise numerical analysis of the structural mechanical performance [5][6][7] of large-span spatial structures have been conducted, and new technologies, including seismic isolation for domes and lattices, have been developed to meet diverse and demanding design needs [8][9][10]. The distinctive structural configurations of large-span spatial structures are marked by the abundance of natural frequencies and threedimensional vibration modal shapes under seismic loading.…”

Section: Introductionmentioning

confidence: 99%

Ground-Motion Intensity Measures for the Seismic Response of the Roof-Isolated Large-Span Structure

Zhen,

Qiu,

Zhang

et al. 2024

Buildings

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Ground-motion intensity measures (IMs), which quantify and describe the characteristics of earthquake ground motion, are of utmost importance in the assessment of seismic risk and the design of resilient structures with large spans. The appropriate selection of a ground-motion IM is crucial in establishing a reliable and robust correlation between seismic hazards and structural demands. The current study presents a novel ground-motion IM that incorporates the influence of multiple vibration modes and period elongation resulting from isolation based on the velocity spectrum. A comprehensive study has been conducted to examine the efficiency of 37 different ground-motion IMs on a roof-isolated large-span structure with engineering demand parameters (EDPs), using far-field ground-motion data. The initial examination of the proposed intensity measure involves a planar lumped-mass model. Subsequently, a numerical model of a large-span roof-isolated structure, specifically the Beijing Workers’ Stadium, is constructed and examined. The results suggest that the proposed intensity measure (IM) demonstrates satisfactory adequacy and achieves optimal efficiency when considering three different engineering demand parameters among 37 other ground-motion intensity measures.

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Section: Introductionmentioning

confidence: 99%

Ground-Motion Intensity Measures for the Seismic Response of the Roof-Isolated Large-Span Structure

Zhen,

Qiu,

Zhang

et al. 2024

Buildings

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“…Three-dimensional (3D) seismic isolation bearings are suitable for synchronized seismic isolation in both the horizontal and vertical directions, such as spring bearings [4,16], lead rubber bearings [17], high-damping rubber bearings [18], and steel-confined rubber bearings [19]. The results of studies on the mesh frame structure show that the bearing has significant seismic isolation and damping effects both horizontally and vertically [20,21]. Han [22] proposed a spring-friction pendulum 3D seismic isolation bearing with low vertical stiffness to effectively isolate long-period ground motions.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Novel Anti-Rocking Bearing

Yang,

Kong,

et al. 2024

Buildings

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To address the issue of severe rocking phenomena under seismic conditions in structures equipped with steel spring isolation bearings, this paper investigates a novel type of anti-rocking bearing. Firstly, the structural configuration and working principle of the novel anti-rocking bearing are introduced, and a design method for bearing parameters is proposed. Secondly, a finite element analysis model is established using SAP2000-v20 software to conduct nonlinear dynamic time–history analysis under seismic loading. The analysis results show that the structural arrangement of the novel anti-rocking bearing reduces both the vertical displacement difference and the rocking angle of the isolation layer. The bearing exhibits a certain level of anti-rocking effect, but it may cause significant tensile forces in some bearings. The effectiveness of the anti-rocking effect improves as the stiffness of the steel tension rod in the bearing increases. For structures equipped with the novel anti-rocking bearing, the acceleration amplifies under most cases, with amplification coefficients ranging from 0.82 to 1.55. Through the finite element simulation of the bearing, the mechanical properties of the bearing are essentially the same as the theoretical analysis results.

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“…Although they can reduce the dynamic response of the structure to a certain extent, they ignore the synchronous isolation of horizontal and vertical directions. The development of three-dimensional bearings has broken through the limitations of unidirectional isolation [22].Nie et al found through a series of shaking table tests and mechanical performance studies that three-dimensional isolation bearings have significant isolation effects in both horizontal and vertical isolation, laying the foundation for the actual function of isolation bearings and structural seismic design [23][24].Zhu et al studied the mechanical performance of a separated three-dimensional isolation system through concept validation, and the results showed that the support effectively protected the structure from the influence of three-dimensional earthquakes and enhanced its load-bearing capacity [25].Li and Zhang et al studied the dynamic characteristics of three-dimensional bearings and found that they have good isolation and vibration reduction effects on three-dimensional isolation [26][27][28].Practice has shown that although horizontal isolation bearings can achieve good isolation effects, they cannot effectively reduce the vertical vibration frequency and vertical seismic response of the structure. However, three-dimensional isolation bearings have significant isolation effects in both horizontal and vertical isolation.This article studies the seismic performance and seismic vulnerability of a special structurethe safety shell structure of a nuclear power plant, based on the new type of isolation support "epoxy plate thick layer rubber isolation support".Research has shown that the support not only has good three-dimensional seismic isolation effect, but also has a low material density, making it easy to transport and install.From the perspective of construction and environmental protection, it has expanded a new direction for the field of seismic reduction and isolation in civil structures.…”

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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Seismic Isolation Research on a Double-Layer lattice Structure Using Shaking Table Tests

Cited by 10 publications

References 24 publications

Ground-Motion Intensity Measures for the Seismic Response of the Roof-Isolated Large-Span Structure

Ground-Motion Intensity Measures for the Seismic Response of the Roof-Isolated Large-Span Structure

Design and Analysis of Novel Anti-Rocking Bearing

Research on seismic isolation performance of nuclear power plant containment structures

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