철도교 설계기준 개정 전ㆍ후의 설계열차하중에 따른 PSC 교량의 거동 비교

Comparison of the Behavior of PSC Bridges According to Design Train Load before and after Revision of Railway Bridge Design Standard

국내철도기준이 개정되면서 설계하중에 대한 부분도 개정되었다. 본 연구에서는 2013년에 KRL-2012하중이 적용됨에 따라 개정되기 전에 설계를 실시한 철도교량에 대하여 개정 전ㆍ후의 설계하중별 유한요소해석을 수행하였다. HL-25, LS-22하중의 경우 KSL-2012대비 모멘트, 응력, 처짐에 대하여 ±3%의 결과값 차이를 보였으며, 허용처짐량은 모두 허용이내인 것으로 나타났다. 이외에 내하력평가도 함께 수행하였다. 기존설계기준과 개정된 설계 열차하중와의 비교를 통해 철도 교량의 설계시 열차하중의 최적 모델을 검토하였다.

The design load of railway standard was changed due to the revision of railway standard. In the 2013, the design load was applied the KRL-2012. In this study, the numerical analysis was conducted for the railway bridge which was constructed according to previous standard considering both design load of previous and revised standard. In case of HL-25 and LS-22 loads, the result difference of ± 3% is shown for moments, stresses and deflections against KSL-2012. In addition, the load bearing capacity was also evaluated. By the comparison previous with revised standard design load, the optimal model of the railway design load was investigated in the design of railway bridge.