Low-cycle fatigue in steel H-piles of integral bridges; a comparative study of experimental testing and finite element simulation

Date

2020-01-10

Author

Karalar, Memduh
Dicleli, Murat

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Integral abutment bridges (IABs) are those bridges without expansion joints. A single row of steel H-piles (SHPs) is commonly used at the thin and stub abutments of IABs to form a flexible support system at the bridge ends to accommodate thermal-induced displacement of the bridge. Consequently, as the IAB expands and contracts due to temperature variations, the SHPs supporting the abutments are subjected to cyclic lateral (longitudinal) displacements, which may eventually lead to low-cycle fatigue (LCF) failure of the piles. In this paper, the potential of using finite element (FE) modeling techniques to estimate the LCF life of SHPs commonly used in IABs is investigated. For this purpose, first, experimental tests are conducted on several SHP specimens to determine their LCF life under thermal-induced cyclic flexural strains. In the experimental tests, the specimens are subjected to longitudinal displacements (or flexural strain cycles) with various amplitudes in the absence and presence of a typical axial load. Next, nonlinear FE models of the tested SHP specimens are developed using the computer program ANSYS to investigate the possibility of using such numerical models to predict the LCF life of SHPs commonly used in IABs. The comparison of FE analysis results with the experimental test results revealed that the FE analysis results are in close agreement with the experimental test results. Thus, FE modeling techniques similar to that used in this research study may be used to predict the LCF life of SHP commonly used in IABs.

Subject Keywords

Finite element simulation, Low cycle fatigue, Steel h-pile, Integral abutment bridge

URI

https://hdl.handle.net/11511/43220

Journal

STEEL AND COMPOSITE STRUCTURES

DOI

https://doi.org/10.12989/scs.2020.34.1.035

Collections

Department of Engineering Sciences, Article

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Low-cycle fatigue performance of steel h-piles in integral bridges Karalar, Memduh; Dicleli, Murat; Department of Engineering Sciences (2014) Integral bridges are jointless bridges where the superstructure is connected monolithically with the abutments. Due to seasonal temperature changes the abutments are pushed against the approach fill and then pulled away, causing lateral displacements at the top of the piles that support the abutments. This may result in the reduction of their service life due to low-cycle fatigue effects. In this research, both analytical and experimental studies are conducted to investigate the effect of thermal induced cy...
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Low Cycle Fatigue Effects in Integral Bridge Steel H-Piles Under Earthquake Induced Strain Reversals Dicleli, Murat (Springer, 2015-01-01) Under the effect of medium and large intensity ground motions, the seismically-induced lateral cyclic displacements and ensuing bending strains in steel H-piles of integral bridges (IBs) could be considerable. As a result, the piles may experience cyclic plastic deformations following a major earthquake. This may result in the reduction of their service life due to low-cycle fatigue effects. Accordingly, low cycle fatigue in integral bridge piles is investigated under seismic effects in this study. For this...
Fracture mechanics approach to predict the low cycle fatigue life of steel H-piles in integral bridge Karalar, M.; Dicleli, Murat (2021-01-01) © 2021 Taylor & Francis Group, LondonIntegral abutment bridges (IABs) are those bridges without expansion joints. A single row of steel H-piles (SHPs) is commonly used at the thin and stub abutments of IABs to form a flexible support system at the bridge ends to accommodate thermal-induced displacement of the bridge. Consequently, as the IAB expands and contracts due to temperature variations, the SHPs supporting the abutments are subjected to cyclic lateral displacements, which may eventually lead to low-c...

Citation Formats

M. Karalar and M. Dicleli, “Low-cycle fatigue in steel H-piles of integral bridges; a comparative study of experimental testing and finite element simulation,” STEEL AND COMPOSITE STRUCTURES, pp. 35–51, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43220.