주형의 하강ㆍ상승을 이용한 연속 P.S.C빔 철도교의 휨거동 해석

An Analysis of Bending Behavior of Continuous P.S.C Girder Railway Bridge by Using Down-Up Method

2span continuous Prestressed concrete girder railway bridges, span length 21m, 25m, 30m, 35m, that down-up method is applied and that designed to satisfy service load in accordance with design criteria of railway bridge can be dropped in their hight compared with existing simply supported prestressed concrete girder railway bridges. Continuous bridges result in guaranteeing safety against bending behavior by loading the practical railway moving load with each velocity. But the natural frequency of span length 21m is estimated not to satisfy recommended limitation of UIC 776-1R..