| Title |
A Study on Static Behavior of 60 m span Half-Decked PSC Girder |
| Authors |
김태민(Kim, Tae Min) ; 박종헌(Park, Jong Heon) ; 김문겸(Kim, Moon Kyum) ; 임윤묵(Lim, Yun Mook) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.2A.065 |
| Keywords |
Half-Decked PSC 거더;60 m 실물교량;4점 재하실험;내하력 half-Decked PSC girder;60 m span full scale girder;4 point bending test;strength |
| Abstract |
In this study, we tested structural performance of Half-Decked PSC girder which was developed for applying to long span bridge. We operated 4 point bending test with 60 m span full scale girder designed as simple bridge with hinge-roller boundary condition. Actuators were set on the both sides of girder, 5.5 m away from the center, and 4 stages of cyclic loading was applied at rate of 1 kN/sec. Through stages 1 to 4, loading and unloading 1,000 kN, 1,200 kN, 1,500 kN, and 2,000 kN were repeated and displacement, strain of concrete and steel, crack of girder were checked. From these results, the strength of girder was assessed and resilience and ductility were observed after removing the load. Since initial flexural crack occurred in the vicinity of 1,400 kN, non-linearity of load-displacement curve appeared and definite residual strain was measured at that point. The test result showed that initial cracking load was over twice the DB-24 load which means the developed girder had sufficient strength. To verify the experimental results, we numerically analyze the test and confirmed that the data were similar with results from the test above. Half-Decked PSC type of 60 m-girder developed in this study showed its adequate structural capacity through static loading test, which proved that possibility of applying the girder to actual bridges practically. |