Reliability analysis of PSC-I girder railway bridge based on measured train axle loads

초록

Current Korean railway bridge design standard adopts the strength design method for concrete structures and the allowable stress design method for steel structures. It is required to keep the Korean railway bridge design standard in pace with the global trend by introducing the reliability-based limit state design (LSD) method superseding the traditional design methods. Reliability indexes of existing railway bridges should be first assessed before the settlement of a target reliability index in the LSD. In this point of view, the reliability index of an existing representative PSC-I girder railway bridge is estimated using the measured values of railway vehicle axle load and the statistical information of material properties presented by preceding researchers. The statistical load data are measured over a month on a commercial railway line of the Joong-ang corridor where heavy freight trains are frequently operated in Korea.