To evaluate the traffic safety of PSC box bridge for high running speed up to 450km/h of KTX, a dynamic analysis of rotation spectrum on the centre of vehicle is needed concurrently with existing design specifications. All directions of rotation spectrum are considered to analyze the dynamic structural behaviors of PSC bridges as well as harmonic running movements of KTX due to three mass; a cargo body, front/rear bogies and four wheel axises connected with two suspensions. KTX power train is modeled by 38 degree-of -freedom ; 6 degree-of-freedom for body and bogies, and 5 degree-of-freedom for wheel axises. The rotation spectrum of KTX resulted in the analysis will be focused on the design specification of KTX running on the bridge, for increasing its speed as a new evaluation standards of traffic safety

• 오순택(서울과학기술대학교 건설시스템디자인공학과 교수, 공학박사) | Oh, Soon Taek
• 이홍주(서울과학기술대학교 건설시스템디자인공학과 학부생) | Lee, Hong Ju
• 이정훈(서울과학기술대학교 건설시스템디자인공학과 학부생) | Lee, Jung Hoon