|
|
|
| Influencing factors of stop-hole method for fatigue crack of steel box girder |
| College of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu 210098, China |
|
|
|
|
Abstract The linear elastic finite-element solid model with crack was established with consideration of different drilling-hole parameters of diameter, location and angle in steel box girder. The stress variations at the hole-edge and along the thickness direction were obtained, and the effects on stress reduction were compared. The proportion of stop-hole influencing factors was discussed based on different stress reduction in different drilling-hole parameters. The results show that large stop-hole cannot effectively retard crack extension. The stress at the hole-edge is 25% larger than that inside, which indicates that the crack becomes easier to produce at surface. The stop-hole needs to be drilled at the center of crack edge to reduce stress contribution, and the stop-hole with a certain eccentricity or angle can improve stress distribution and effectiveness.
|
|
Received: 29 October 2014
|
|
|
|
|
|
|
2016, Vol. 37 
