PURPOSES : The purpose of this study is to evaluate the structural effects of subbase materials and surface layer thickness obtained from different sites.
METHODS : Using a falling weight deflectometer, structural indexes such as SM(r), surface curvature index, base damage index, base curvature index, and AREA, were determined and compared with those of the control section. The back-elastic moduli for each layer were evaluated using the BALM program, and the tensile and compressive strains were analyzed using the KENLAYER program. The damage analysis was conducted to determine both the permanent deformation and fatigue cracking under repeated loading.
RESULTS : Increasing the surface layer can improve the elastic moduli of the construction section and compensate for the inclusion of different percent finer within 5% in the subbase layer.
CONCLUSIONS : The structural effect of adding 5% of 50 m/m aggregate can be compensated for by increasing the thickness of the surface layer.

ABSTRACT
1. 서론
    1.1. 논문개요
2. 시험개요 및 해석방법
    2.1. 시험개요
    2.2. 해석방법
3. 시험결과
    3.1. 선형탄성해석
    3.2. 역해석
    3.3. 전산해석 및 손상해석
4. 결론
REFERENCES

• 박태순(서울과학기술대학교 건설시스템공학과) | Park Tae-Soon
• 강일환(서울과학기술대학교 건설시스템공학과) | Kang Il-Hwan (Department of Civil Engineering, Seoul National Univ. of Science and Technology) 교신저자