Nonlinear Finite Element Analysis of Prestressed Concrete Containment Vessel under Severe Accident Loads

Jin, Song; Li, Zhongcheng; Lan, Tianyun; Dong, Zhanfa; Gong, Jinxin

doi:10.1007/s12205-020-0603-3

Cited by 17 publications

(3 citation statements)

References 12 publications

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“…Additionally, they summarized the methods for assessing the ultimate bearing capacity of similar containment structures. Jin et al [4], on the other hand, concentrated on analyzing the material nonlinear structural response of the prestressed concrete containment. Their main objective was to evaluate the safety margin of the containment structure.…”

Section: Introductionmentioning

confidence: 99%

Study on yield limit of steel containment under external pressure considering initial defects

Zhang,

Li,

Ying

et al. 2024

J. Phys.: Conf. Ser.

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The main objective of floating nuclear power plants (FNPP) is an emerging technology product formed by applying land small-scale nuclear power plant technology to the marine field. The containment structure studied in this article plays a great role in protecting the safety of FNPP’s nuclear power system. When exploring the safety performance of the containment structure under accident conditions, it is necessary to analyze and study the external pressure yield limit of the containment. This study provides a reference basis for the static buckling limit calculation of spherical shell structures similar to steel safety shells. The article adopts a geometric initial defect analysis method based on buckling mode to consider the initial defects of the model and explores the external pressure yield limit of the safety shell through the arc length method. The research results analyzed that the external pressure yield limit of the containment vessel decreased by about 30% under the influence of initial defects and pointed out the weak structural parts of the containment vessel in the buckling analysis.

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Section: Introductionmentioning

confidence: 99%

Study on yield limit of steel containment under external pressure considering initial defects

Zhang,

Li,

Ying

et al. 2024

J. Phys.: Conf. Ser.

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“…Non-linear FE Modeling is an effective approach to conduct a parametric analysis based on a calibrated developed model (Chen et al, 2016; Jin et al, 2020; Jumaah et al, 2021). Deng et al (2013) carried out FE analyses to simulate the flexural performance of the CFST beams.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of post-tensioned concrete-filled steel tube beams using unbonded tendons with uncertainty quantification

Ghaemdoust,

Yang,

Wang

et al. 2023

Advances in Structural Engineering

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The centerpiece of many research projects is evaluating the structural performance of the concrete-filled steel tubes (CFSTs). When these structural elements are employed as flexural members, some parts of the concrete infill are subjected to tension, and consequently the concrete is cracked so that the confinement effect is reduced. Therefore, the application of tendons and modification of the CFST configuration are deployed to improve the serviceability of the CFST beams. A non-linear finite element (FE) model considering the effects of the material and geometrical non-linearity and initial imperfection is developed. Concurrently, an analytical model based on the plastic stress distribution method (PSDM) is proposed to compare the results. In addition, a probabilistic assessment along with the uncertainty quantification is conducted to calculate the reliability indices and the sensitivity of the beams to the variation of the input variables. The results of the study demonstrate that the implemented measures considerably enhance the moment capacity and serviceability performance of the CFST beams. Moreover, the sensitivity analyses show the significance of the variables on the model output with different steel yield stress values and the importance is ordered as the steel tube width followed by the steel tube thickness and the concrete strength.

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“…The cooling method was used to apply prestress to the truss unit T3D2 [44,45]. To improve analysis efficiency, for the multi-span prestressed frame structures YKJ8, YKJ9 and YKJ10, axisymmetric models were created by imposing symmetric boundary conditions on the split boundary of the symmetry axis [46,47]. The finite element model of YKJ1 is shown in Figure 5.…”

mentioning

confidence: 99%

Calculation of Additional Internal Forces in Post-Tensioned Prestressed Concrete Frame Columns Based on Equivalent Lateral Stiffness

Wang

Cheng

et al. 2022

Buildings

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The additional internal forces in vertical members caused by prestressed tendons are typically overlooked in the design of post-tensioned prestressed concrete. A calculation method for additional internal forces in single-story multi-span prestressed concrete frame columns based on equivalent lateral stiffness is proposed in this paper. The slope-deflection equation for the bar element was presented using Timoshenko beam assumptions, taking into account the influence of shear and bending deformations. Subsequently, the concept of equivalent lateral stiffness and calculation equations were proposed. On this basis, the equations of the third shear and third bending moment for single-story multi-span prestressed frame columns were established. Furthermore, applying engineering examples, the method in this study was verified by ABAQUS software and previous methods. The results show that theoretical values and FEA results are in good agreement. Compared to previous methods, the method in this paper is more accurate and widely applicable. In addition, the stretching plan has a significant path effect and time-varying effect on the interlayer distribution of the third moment. It should be considered at the building stage to check the calculation of the frame column.

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Nonlinear Finite Element Analysis of Prestressed Concrete Containment Vessel under Severe Accident Loads

Cited by 17 publications

References 12 publications

Study on yield limit of steel containment under external pressure considering initial defects

Study on yield limit of steel containment under external pressure considering initial defects

Performance assessment of post-tensioned concrete-filled steel tube beams using unbonded tendons with uncertainty quantification

Calculation of Additional Internal Forces in Post-Tensioned Prestressed Concrete Frame Columns Based on Equivalent Lateral Stiffness

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