| Title |
An Experimental Study on the Stress Behavior of Coped Stringers in Steel Railway Bridge -Ⅰ : the Reason Why Crack Occurs |
| Keywords |
coped stringers;lateral bracing;in plane stress;out plane stress;세로보 절취부;수평브레이싱;면내응력;면외응력 |
| Abstract |
In this study, in order to research the causes lead to fatigue crack in the coped stringer of a steel railway bridge, we take the steel railway bridge which actually occurs fatigue crack as a research object and manufacture the full size of crossbeam-stringer and floor system model to perform the experimental test. The results indicates that, the fatigue crack in the top of coped area of stringers is caused by the reciprocal action of the in plane stress in the tip of coped area of web by the negative moment occurred in the end of the stringers. While the fatigue crack in the bottom of coped area of stringers is due to the plane stress caused by the out-plane deformation relative to the bottom of coped area of web of the fixed end in the stringers. |