표제지
목차
제1장 서론 10
1.1. 연구배경 및 목적 10
1.2. 연구동향 12
1.2.1. 지점부에 관한 설계 기준 및 연구 12
1.2.2. 최근 스트레스 리본교량의 연구 동향 13
제2장 스트레스 리본 교량 15
2.1. 스트레스 리본 교량의 개념 15
2.2. 스트레스 리본 교량의 설계 15
2.2.1. 설계 순서 16
2.2.2. 시공절차 18
제3장 스트레스 리본 교량의 해석 모델 및 거동 특성 20
3.1. 유한요소 해석 20
3.1.1. 해석 모델 20
3.1.2. 시공 순서 대비 유한요소 해석 방법 21
3.1.3. 해석 모델의 상세 물성치 및 적용 하중 26
3.1.4. 해석 모델 검증 27
3.2. 스트레스 리본 교량의 거동 특성 분석 31
3.2.1. 시공 단계별 거동 특성 31
3.3. 지점부 형상에 따른 거동 특성 38
3.3.1. 단면 두께 변화에 따른 거동 특성 39
3.3.2. 단면 폭 변화에 따른 거동 특성 42
3.3.3. 단면 적용길이 변화에 따른 거동 특성 45
3.3.4. 케이블 위치 변화에 따른 거동 특성 48
3.3.5. 소결론 50
제4장 지점부 설계 방안 51
4.1. 지점부 설계 변수 51
4.2. 설계 변수별 해석 결과 53
4.2.1. 2차 케이블의 위치 변화 53
4.2.2. 단면의 두께 변화 55
4.2.3. 단면의 폭 변화 61
4.3. 지점부 설계안 64
4.3.1. 지점부 설계안 검증 65
제5장 결론 67
참고문헌 68
ABSTRACT 70
Table 3.1. Compared to FEM analysis method of construction sequence 21
Table 3.2. Material and geometric properties 26
Table 3.3. Load case considering the construction sequence 27
Table 3.4. Characteristics of model 28
Table 3.5. Comparing result (sag) 29
Table 3.6. Comparing result (reaction force) 30
Table 3.7. Comparing result (Moment1) 30
Table 3.8. Comparing result (Moment2) 30
Table 4.1. Design variable 52
Table 4.2. Cross section of verification 65
Fig 1.1. Stress ribbon bridge 10
Fig 1.2. Saddle 11
Fig 1.3. Flexible support member 11
Fig 2.1. Structure of Stress ribbon bridge 15
Fig 2.2. Structure of Stress ribbon bridge 17
Fig 2.3. Construction sequence of Stress ribbon bridge 19
Fig 3.1.1. Model of Single span Stress Ribbon Bridge 20
Fig 3.1.2. Layout of Stress ribbon bridge 20
Fig 3.1.3. Modeling for initial shape 22
Fig 3.1.4. Behavior of arch structure with postension 23
Fig 3.1.5. Introduction of prestressing 24
Fig 3.1.6. Additional load 25
Fig 3.1.7. Geometry of stress ribbon bridge 27
Fig 3.2.1. Deflection curve of construction stages 31
Fig 3.2.2. The center deflection of construction stages 32
Fig 3.2.3. Moment curve of construction stages 32
Fig 3.2.4. The center moment of construction stages 33
Fig 3.2.5. Stress curve of construction stages 33
Fig 3.2.6. Stress of construction stages 34
Fig 3.2.7. Deflection curve of construction stages 35
Fig 3.2.8. Moment curve of construction stages 35
Fig 3.2.9. Moment of construction stages 36
Fig 3.2.10. Stress curve of construction stages 36
Fig 3.2.11. Stress of construction stages 37
Fig 3.3.1. Layout of the Deck section. 38
Fig 3.3.2. Increased cross section thickness 39
Fig 3.3.3. Deflection curve of creep & shrinkage 40
Fig 3.3.4. Momen curve of creep & shrinkage 40
Fig 3.3.5. Stress curve of creep & shrinkage 41
Fig 3.3.6. Increased cross section width 42
Fig 3.3.7. Deflection curve of creep & shrinkage 43
Fig 3.3.8. Moment curve of creep & shrinkage 43
Fig 3.3.9. Stress curve of creep & shrinkage 44
Fig 3.3.10. Length of the variable section 45
Fig 3.3.11. Deflection curve of creep & shrinkage 45
Fig 3.3.12. Moment curve of creep & shrinkage 46
Fig 3.3.13. Stress curve of creep & shrinkage 47
Fig 3.3.14. Eccentricity of the variable section 48
Fig 3.3.15. Deflection curve of creep & shrinkage 48
Fig 3.3.16. Moment curve of creep & shrinkage 49
Fig 3.3.17. Stress curve of creep & shrinkage 50
Fig 4.1.1. Variable cross-section of end support 51
Fig 4.1.2. Location of second cable 51
Fig 4.2.1. Moment curve of creep & shrinkage 53
Fig 4.2.2. Moment of creep & shrinkage 53
Fig 4.2.3. Stress curve of creep & shrinkage 54
Fig 4.2.4. Stress of creep & shrinkage 54
Fig 4.2.5. Moment curve according to tapered ratio(γH) in creep shrinkage(이미지참조) 55
Fig 4.2.6. Moment according to tapered ratio(γH) in creep shrinkage(이미지참조) 56
Fig 4.2.7. Stress curve of construction stages 57
Fig 4.2.8. Stress curve according to tapered ratio(γH) in creep shrinkage(이미지참조) 57
Fig 4.2.9. Stress according to tapered ratio(γH) in creep shrinkage(이미지참조) 58
Fig 4.2.10. Stress curve according to tapered ratio(γH) in live load(이미지참조) 59
Fig 4.2.11. Stress according to tapered ratio(γH) in live load(이미지참조) 60
Fig 4.2.12. Moment curve according to tapered ratio(γH) in creep shrinkage(이미지참조) 61
Fig 4.2.13. Moment according to tapered ratio(γH) in creep shrinkage(이미지참조) 61
Fig 4.2.14. Stress curve of construction stages 62
Fig 4.2.15. Stress curve according to tapered ratio(γW)(이미지참조) 63
Fig 4.2.16. Stress according to tapered ratio(γW)(이미지참조) 63
Fig 4.3.1. Reasonable tapered ratio(γH)(이미지참조) 64
Fig 4.3.2. Reasonable tapered ratio(γW)(이미지참조) 64
Fig 4.3.3. Maximum compressive stress of cross section 65
Fig 4.3.4. Maximum tensile stress of cross section 66