Nonlinear finite element simulation of unbonded prestressed concrete beams

Moreira, Leandro Soares; Sousa, João Batista M.; Parente, Evandro

doi:10.1016/j.engstruct.2018.05.077

Cited by 38 publications

(14 citation statements)

References 27 publications

(46 reference statements)

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“…Although the early analysis of the ultimate load-carrying capacity of curved girders can be dated back to the 1960s [ 4 , 6 , 7 , 8 , 9 , 10 , 11 ], regarding the analysis methods, some scholars studied the theory of curved bridges, including pure torsion theory, limiting torsion theory, and bridge type theory, which built the groundwork for the study of CPCBG bridges [ 12 , 13 ]. Subsequently, with the improvement of computing technology, which can realize the operation of a higher-order matrix on the computer, some researchers have used the curve finite band method and finite element method to analyze the deflection deformation and structural force of the prestressed curve bridge [ 14 , 15 ]. However, the analysis method still lags behind the engineering application.…”

Section: Introductionmentioning

confidence: 99%

Analysis of The Working Performance of Large Curvature Prestressed Concrete Box Girder Bridges

et al. 2022

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Based on numerical shape functions and the structural stressing state theory, the mechanical properties of the curved prestressed concrete box girder (CPCBG) bridge model under different loading cases are presented. First, the generalized strain energy density (GSED) obtained from the measured strain data is used to represent the stressing state pattern of the structure; then, the stressing state of the concrete section is analyzed by plotting the strain and stress fields of the bridge model. The stressing state pattern and strain fields of the CPCBG are shown to reveal its mechanical properties. In addition, the measured concrete strain data are interpolated by the non-sample point interpolation (NPI) method. The strain and stress fields of the bridge model have been plotted to analyze the stressing state of the concrete cross-section. The internal forces in the concrete sections are calculated by using interpolated strains. Finally, the torsional effects are simulated by measuring the displacements to show the torsional behavior of the cross-section. The analysis and comparison of the internal force and strain fields reveal the common and different mechanical properties of the bridge model. The results of the analysis of the curved bridge model provide a reference for the future rational design of bridge projects.

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Section: Introductionmentioning

confidence: 99%

Analysis of The Working Performance of Large Curvature Prestressed Concrete Box Girder Bridges

et al. 2022

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“…Peng et al [1] proposed calculation methods on flexural capacity of unbonded PC concrete members together with ultimate stress of unbonded prestressing strands. Moreira et al [2] undertook a finite element (FE) simulation of unbonded PC beams and then developed a convergence method of Newton-Raphson scheme. Páez and Sensale [3] presented an analysis approach on over time of unbonded PC beams and then improved the formulas of calculating loss in prestress.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Unbonded Prestressed Concrete Bridge Girders

Tang

Zhang

Song

et al. 2021

Advances in Civil Engineering

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This paper presents an experimental and numerical investigation on the flexural behavior of unbonded prestressed concrete (PC) T bridge girders. Three unbonded PC T bridge girders with different prestress degrees spanning 3 m were selected to perform four-point bending tests and then determine the flexural performance. Flexural capacity, crack development and failure mode, load-deflection curves, strain in longitudinal rebars, and stress in prestressing strands of unbonded PC T bridge girders are experimentally analyzed. Subsequently, three-dimensional finite element (FE) models are built and validated by experiments to investigate the effect of different design parameters on flexural behavior of bridge girders. Results generated from experiment and numerical studies show that the flexural destruction behavior in unbonded PC T bridge girders experiences elastic, elastic-plastic, and ductility stages, similar to that of PC T bridge girders. The prestress degree and load location have significant influence on the destruction process in unbonded PC T bridge girders. A lower effective prestress degree can reduce the distribution range in cracks and also increase the width of cracks. Stress in prestressing strands under anchor increases rapidly after concrete presents obvious cracks, and the fracture area within prestressing strands increases with the elevation of prestress degree. The aim of this study is to provide a reference for the design and practical application of unbonded PC T bridge girders.

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“…e computational issues associated with strain-softening materials are briefly discussed by Barrera et al [8] from the material constitutive relation aspect and by Zienkiewicz and Taylor [9] from the numerical calculation aspect. For a specific class of proportional loading that loads can be expressed by a load multiplier (e.g., the pushover analysis), the softening branch in the global load-displacement curve can be simulated by a displacement-control approach, with the prescribed displacement in one degree [10,11] or the prescribed incremental displacement norm [12,13].…”

Section: Introductionmentioning

confidence: 99%

Kinematic and Static Solutions for Beam Column with Nonlinear Springs Using the Extended Linear Matching Method

Gao

2021

Shock and Vibration

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In this paper, the kinematic and static solutions for solving the static response of the beam column with nonlinear springs are presented by adopting the extended linear matching method (LMM). The extended LMM can be used to predict the displacement response of the beam-column system consisting of perfectly plastic and strain-softening materials. It is found that the kinematic solution generated by the extended LMM demonstrates a monotonic decrease for perfect plastic materials with certain restrictions on the yield surface. The potential energy of the system is proved to decrease with iterations for both perfect plastic and strain-softening materials if the loading multiplier remains constant. The extended LMM method is then applied to analyse the response of the pile system in a 3-leg offshore platform. An incremental procedure is recommended to determine the peak load for the soil exhibiting strain-softening. A displacement-control approach is used with the loading multiplier obtained from the variation of the potential energy. Good convergence of the method is obtained.

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Nonlinear finite element simulation of unbonded prestressed concrete beams

Cited by 38 publications

References 27 publications

Analysis of The Working Performance of Large Curvature Prestressed Concrete Box Girder Bridges

Analysis of The Working Performance of Large Curvature Prestressed Concrete Box Girder Bridges

Flexural Behavior of Unbonded Prestressed Concrete Bridge Girders

Kinematic and Static Solutions for Beam Column with Nonlinear Springs Using the Extended Linear Matching Method

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