A parametric study was carried out to gain an insight about structural performances considering abnormal behavior effects in high strength steel pipe strut system. Six load cases were considered as undesirable deflections of strut structures, which are basic load combination, excessive excavation situations, impact loading effects, additional overburden loads, load combinations, and 50% reduction of strut length. Subsequent simulation results present various influences of parameters on structural performances of the strut system. Based on the results, we propose methods to prevent unusual behaviors of pipe-type strut structures made of high strength steels.

Abstract
 1. 서 론
 2. 장기거동 계측 및 이상 거동 시나리오
 3. 이상 거동 유발 재현 모델링 및해석 결과분석
 4. 변수해석을 통한 이상 거동 유발 재현시스템의 구조성능 평가
 5. 요약 및 결론
 REFERENCES

• 이진우(안동대학교 토목공학과 박사수료) | Lee Jin-Woo (Ph.D. Candidate, Department of Civil Engineering, Andong National University)
• 노명현(포스코 철강솔루션마케팅실 구조연구그룹 책임연구원) | Noh Myung-Hyun (Senior Researcher, Structure Research Group, Steel Solution Marketing Dept., POSCO, Incheon)
• 이상열(안동대학교 토목공학과 부교수) | Lee Sang-Youl (Associate Professor, Department of Civil Engineering, Andong National University) Corresponding author