PURPOSES : The purpose of this study was to investigate the characteristics of concrete pavement behaviors and performance depending on the group-axle types of heavy vehicles, such as single-, tandem-, and tridem-axles.
METHODS : The concrete pavement performance indices (such as the rate of fatigue cracking and surface smoothness) according to the different group-axle types of heavy vehicles were predicted using the Korean pavement design program. It was assumed that the load magnitude was the same for each axle, and that the equivalent single-axle traffic volumes were the same for the different group-axle types. The concrete pavement stresses depending on the different group-axle types of heavy vehicles were also analyzed using a finite element analysis program. RESULTS : Based on the design criteria, the concrete pavement performance was the highest under tandem-axle traffic and lowest under single-axle traffic, although the difference in performance was not significant. Based on the structural analysis criteria, the tensile stress of the concrete pavement was the largest under the single-axle load and smallest under the tridem-axle load when the load magnitude of each axle was the same.
CONCLUSIONS : Based on the results obtained from considering both the design and analysis criteria, it was concluded that the groupaxle types (such as the tandem- and tridem-axle configurations of heavy vehicles) would not increase the stress or decrease the performance of concrete pavements relative to the single-axle configuration.

ABSTRACT
1. 서론
2. 설계기반 그룹축 구성에 따른 공용성 분석
    2.1. 콘크리트 포장 설계 및 공용성 분석 방법
    2.2. 그룹축 구성에 따른 공용성 분석
    2.3. 연평균일일교통량을 반영한 공용성 분석
3. 해석기반 그룹축 구성에 따른 공용성 분석
    3.1. 수치해석 모델링
    3.2. 포장 두께에 따른 응력분포 비교 분석
    3.3. 그룹축 구성에 따른 최대 응력 비교 분석
4. 결론
REFERENCES

• 김성민(경희대학교 공과대학 사회기반시스템공학과 교수) | Kim Seong-Min Corresponding author