강상판 접합부의 피로균열 진전 시 STOP HOLE의 효과에 관한 연구 = The Effect of Stop Hole on the Fatigue Crack Propagation on Steel Plate Deck

다국어 초록 (Multilingual Abstract)

Orthotropic steel decks are used in long span and moving bridges because of their high strength to weight ratio. However the decks are subjectde to high dynamic stresses due to wheel loading by heavy goods vehicles so that they have to be assessed for fatigue cracking.
The fatigue assessment of orthotropic decks is excluded from most bridge design codes because of the complexity of the stress distribution and the fact that bending stress may predominate whereas weld classification tables are based on axially.
Orthotropic steel decks are very sensitive to fatigue damage because they are directly subjected to the actions of wheel loads which give rise to stress ranges which are high compared to the dead load stresses especially if the surfacing is thin. The cracking that devel9oped was caused by large imperfections that were fabricated in short transverse groove connections. To stop the crack development, Stop hole should be excavated.
The purpose of this paper, serviceability was approved by comparing surveyed data and stress distribution by structural analysis around stop hole and confirmed by minimized stress due to the size of stop hole. Also, stress distribution around scallop was computed by structural analysis modelled as actual steel bridge, Gul-Hyun Grand Bridge.

목차 (Table of Contents)

• 1.서론
• 1.1.연구배경 및 목적
• 1.2.연구 방법
• 2.정적재하실험
• 2.1.시험체 형상 및 치수
• 2.2.실험 방법
• 2.3.정적재하실험 결과
• 3. 피로실험과 Stop Hole 천공실험
• 3.1.실험개요
• 3.2.Type A 피로실험 및 stop hole 천공실험
• 3.3.Type B 피로균열과 stop hole 천공실험
• 4.정밀구조해석
• 4.1.구조해석방법
• 4.2.구조해석 모델
• 4.3.구조해석 결과
• 4.5.Stop Hole의 사용성 검토
• 5.결론