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공항 콘크리트 포장 구조해석을 위한 3차원 유한요소 모형 개발

Development of Three-Dimensional Finite Element Model for Structural Analysis of Airport Concrete Pavements

  • 박해원 (인하대학교 토목공학과) ;
  • 심차상 (인하대학교 토목공학과) ;
  • 임진선 (삼우아이엠씨 기술연구소) ;
  • 조남현 (인천국제공항공사 공항연구소) ;
  • 정진훈 (인하대학교 사회인프라공학과)
  • 투고 : 2017.10.16
  • 심사 : 2017.10.25
  • 발행 : 2017.12.15

초록

PURPOSES : In this study, a three-dimensional nonlinear finite element analysis (FEA) model for airport concrete pavement was developed using the commercial program ABAQUS. Users can select an analysis method and set the range of input parameters to reflect actual conditions such as environmental loading. METHODS : The geometrical shape of the FEA model was chosen by considering the concrete pavement located in the third-stage construction site of Incheon International Airport. Incompatible eight-node elements were used for the FEA model. Laboratory test results for the concrete specimens fabricated at the construction site were used as material properties of the concrete slab. The material properties of the cement-treated base suggested by the Federal Aviation Administration(FAA) manual were used as those of the lean concrete subbase. In addition, preceding studies and pavement evaluation reports of Incheon International Airport were referred for the material properties of asphalt base and subgrade. The kinetic friction coefficient between the concrete slab and asphalt base acquired from a preceding study was used for the friction coefficient between the layers. A nonlinear temperature gradient according to slab depth was used as an input parameter of environmental loading, and a quasistatic method was used to analyze traffic loading. The average load transfer efficiency obtained from an Heavy falling Weight Deflectomete(HWD) test was converted to a spring constant between adjacent slabs to be used as an input parameter. The reliability of the FEA model developed in this study was verified by comparing its analysis results to those of the FEAFAA model. RESULTS : A series of analyses were performed for environmental loading, traffic loading, and combined loading by using both the model developed in this study and the FEAFAA model under the same conditions. The stresses of the concrete slab obtained by both analysis models were almost the same. An HWD test was simulated and analyzed using the FEA model developed in this study. As a result, the actual deflections at the center, mid-edge, and corner of the slab caused by the HWD loading were similar to those obtained by the analysis. CONCLUSIONS : The FEA model developed in this study was judged to be utilized sufficiently in the prediction of behavior of airport concrete pavement.

키워드

참고문헌

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피인용 문헌

  1. Development of Maximum Tensile Stress Prediction Model for Airport Concrete Pavements Using Environmental and B777 Aircraft Gear Loadings vol.20, pp.5, 2018, https://doi.org/10.7855/IJHE.2018.20.5.093