This study analyzes the seismic response of traffic light poles, considering soil-foundation effects through nonlinear static and time history analyses. Two poles are investigated, uni-directional and bi-directional, each with 9 m mast arms. Finite element models incorporate the poles, soil, and concrete foundations for analysis. Results show that the initial stiffness of the traffic light poles decreases by approximately 38% due to soil effects, and the drift ratio at which their nonlinear behavior occurs is 77% of scenarios without considering soil effects. The maximum acceleration response increases by about 82% for uni-directional poles and 73% for bi-directional poles, while displacement response increases by approximately 10% for uni-directional and 16% for bi-directional poles when considering soil-foundation effects. Additionally, increasing ground motion intensity reduces soil restraints, making significant rotational displacement the dominant response mechanism over flexural displacement for the traffic light poles. These findings underscore the importance of considering soil-foundation interactions in analyzing the seismic behavior of traffic light poles and provide valuable insights to enhance their seismic resilience and safety.

1. 서 론
2. 교통신호등주
    2.1 교통신호등주 모델링
    2.2 교통신호등주 동특성
3. 지 반
    3.1 지반 모델링
    3.2 지반운동 선정 및 지반의 지진파 증폭 특성
4. 비선형 정적해석
5. 시간이력해석 및 응답분석
6. 결 론

• 김태현(전북대학교 토목공학과 박사과정) | Kim Taehyeon (Ph.D. Student, Department of Civil Engineering, Jeonbuk National University)
• 전종수(한양대학교 건설환경공학과 부교수) | Jeon Jong-Su (Associate Professor, Department of Civil and Environmental Engineering, Hanyang University)
• 노화성(전북대학교 토목공학과 교수) | Roh Hwasung (Professor, Department of Civil Engineering, Jeonbuk National University) Corresponding author