PURPOSES : This study aims to understand the effect of defective dowel bar installation on jointed concrete pavement (JCP), which can cause joint freezing, spalling, cracking, and faulting and finally shorten the lifespan of the pavement. METHODS : A comprehensive field survey was undertaken at an expressway construction site in South Korea to assess dowel bar installation conditions. In addition, finite element (FE) analysis was used to simulate JCP behavior with both vertical and horizontal dowel misalignments. Different temperature conditions, including a change of -55 °C and gradient of -0.1 °C/mm, were integrated into the FE model to examine horizontal slab contraction and simultaneous slab curling. RESULTS : The analysis revealed pronounced slab behaviors under specific temperature changes, particularly when combined with dowel misalignments. The simultaneous effects of horizontal contraction and slab curling owing to temperature changes and gradients became more evident in the presence of dowel misalignments. CONCLUSIONS : The results confirmed that dowel bar misalignment considerably affected the behavior of the JCP, thereby emphasizing the importance of the proper installation of dowel bars.

1. 서론
2. 현장조사
    2.1. 수직 기울어짐
    2.2. 수평 기울어짐
3. 다웰바 기울어짐 상태를 고려한 3차원 유한요소해석
    3.1. 유한요소모형의 구성
    3.2. 하중 및 해석방법
4. 수직 기울어짐 해석 결과
    4.1. 슬래브 수평 거동
    4.2. 슬래브 수평 및 컬링거동
5. 수평 기울어짐 해석 결과
    5.1. 슬래브 수평 거동
    5.2. 슬래브 수평 및 컬링거동
6. 결론

• 김상호(정회원 · 세원이엔이 전무) | Kim Sang Ho
• 임진선(정회원 · 삼우아이엠씨 기술연구소 연구소장) | Lim Jin Sun
• 이대식(정회원 · 인하대학교 공과대학 토목공학과 박사과정) | Lee Dae Sik
• 정진훈(정회원 · 인하대학교 공과대학 사회인프라공학과 교수) | Jeong Jin Hoon 교신저자