Identifying significant earthquake intensity measures for evaluating seismic damage and fragility of nuclear power plant structures

Nguyen, Duy-Duan; Thusa, Bidhek; Han, Tong Seok; Lee, Tae Hyung

doi:10.1016/j.net.2019.06.013

Cited by 46 publications

(9 citation statements)

References 40 publications

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“…Figure 3 shows the based-isolated model and the arrangement of LRBs. More details of the modeling can be found in [14][15][16][17][18][19]. The 1st and 2nd modes of the non-isolated NPP model are the horizontal translation modes of the containment building, while the 3rd and 4th modes represent the translational modes of the auxiliary building, as shown in Figure 5(a).…”

Section: Numerical Modelingmentioning

confidence: 99%

Seismic Responses of NPP Structures Considering the Effects of Lead Rubber Bearing

Nguyen¹,

Nguyen²

2020

Eng. Technol. Appl. Sci. Res.

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Abstract-This study investigates the effects of Lead Rubber Bearings (LRBs) on Floor Response Spectra (FRS) of Nuclear Power Plant (NPP) structures. Three main structures in the Advanced Power Reactor 1400 (APR1400) NPP including the reactor containment building, an internal structure, and an auxiliary building were numerically developed in SAP2000. The structures were modeled using beam stick elements, and lumped masses were assigned to beam element nodes. All equivalent section properties of beam elements were calculated based on the designed cross-sections of the structures. A series of 40 ground motions with response spectra scaled to match the NRC 1.60 spectrum were utilized in numerical time-history analyses. Finally, a thorough comparison of FRS was conducted at different elevations of the structures, considering both with and without LRB. Numerical results showed that the FRS of base-isolated structures at higher elevations was significantly reduced compared to non-isolated structures. However, at lower elevations, the FRS was higher for the base-isolated structures compared to the non-isolated ones. Additionally, at a low-frequency range, roughly smaller than 3 Hz, the FRS of base-isolated structures was always greater than that of the non-isolated ones.

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Section: Numerical Modelingmentioning

confidence: 99%

Seismic Responses of NPP Structures Considering the Effects of Lead Rubber Bearing

Nguyen¹,

Nguyen²

2020

Eng. Technol. Appl. Sci. Res.

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“…Several metrics have been proposed to identify optimal seismic IMs for structural evaluation, including efficiency, practicality, proficiency, sufficiency, and hazard computability [15,16,18,40]. To date, these evaluation metrics and related works have focused on buildings [41][42][43][44], bridges [45,46], and more recently, pipelines [47] and dams [48]. To the best of the authors' knowledge, there exists no relevant work dealing with tunnels.…”

Section: Introductionmentioning

confidence: 99%

Selection of optimal intensity measures for fragility assessment of circular tunnels in soft soil deposits

Huang

Pitilakis

Argyroudis

et al. 2021

Soil Dynamics and Earthquake Engineering

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“…It is essential to identify the optimal IM that adequately correlates with the structural response to establish a perfect relationship between structural response and IM [9]. There are several studies that explained the correlation between seismic IMs and seismic responses of buildings [10][11][12], bridge structures [13][14][15][16][17], nuclear power plant structures [18,19], pipelines [20,21], dams [22,23], tunnels [24], and storage tanks [25]. Babaei et al [26,27] tried to find the best pair of IM-EDP for jacket structures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Optimal Intensity Measures Selection in Engineering Demand Parameter of Fixed Jacket Offshore Platform

et al. 2021

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This research identifies the significant optimal intensity measures (IM) for seismic performance assessments of the fixed offshore jacket platforms. A four-legged jacket platform for the oil and gas operation is deployed to investigate the seismic performance. The jacket platform is applied with nonlinearly modeled using finite element (FE) software OpenSees. A total of 80 ground motions and 21 different IMs are incorporated for numerical analyses. Nonlinear time-history analyses are performed to obtain the jacket structure’s engineering demand parameters (EDP): peak acceleration and displacement at the top of the structure. Four important statistical parameters: practicality, efficiency, proficiency, and coefficient of determination, are then calculated to find the significant IMs for seismic performance of the jacket structure. The results show that acceleration-related IMs: effective design acceleration (EDA), A95 parameter, and peak ground acceleration (PGA) are optimal IMs, and the acceleration-related IMs have good agreements with the acceleration-related EDP.

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Identifying significant earthquake intensity measures for evaluating seismic damage and fragility of nuclear power plant structures

Cited by 46 publications

References 40 publications

Seismic Responses of NPP Structures Considering the Effects of Lead Rubber Bearing

Seismic Responses of NPP Structures Considering the Effects of Lead Rubber Bearing

Selection of optimal intensity measures for fragility assessment of circular tunnels in soft soil deposits

Influence of Optimal Intensity Measures Selection in Engineering Demand Parameter of Fixed Jacket Offshore Platform

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