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Contents 11
제1장 서론 26
1.1. 연구배경 26
1.2. 연구목적 28
1.3. 논문구성 및 내용 30
제2장 연구동향 32
2.1. 국내 연구동향 32
2.2. 해외 연구동향 35
2.2.1. 콘크리트 슬래브 두께 설계(AASHTO) 35
2.2.2. 콘크리트 슬래브 리프팅 위치 설계(PCI) 36
2.2.3. 프리캐스트 콘크리트 포장 공법(USA) 38
제3장 PCP 모델 개발 39
3.1. PCP의 구조시스템 39
3.2. PCP 모델 개발 43
3.2.1. PCP 모델의 기본개념 43
3.2.2. PCP 모델을 위한 재료물성 46
3.2.3. 철근요소 모델링 48
3.2.4. 경계조건 및 접촉요소 48
3.2.5. PCP 하부층 모델링 방안 50
3.2.6. PCP 모델 적용하중 52
3.2.7. PCP 모델의 요소형상 및 타입 55
3.2.8. 수렴도 시험 65
3.3. PCP 모델의 검증 67
3.3.1. Closed Form Solution에 의한 검증 67
3.3.2. 실측에 의한 검증 76
3.4. 환경하중에 의한 PCP 모델의 구조적 거동 81
3.5. 차량하중에 의한 PCP 모델의 구조적 거동 90
3.5.1. Single Axle에 의한 거동 90
3.5.2. Tandem Axle에 의한 거동 97
3.6. 소결 100
제4장 PCP 최적설계를 위한 수치해석 102
4.1. PCP 기층의 두께 102
4.1.1. 개요 102
4.1.2. 수치해석 모델 103
4.1.3. 수치해석 결과 104
4.1.4. 설계 주안사항 109
4.2. PCP 기층의 종류 110
4.2.1. 개요 110
4.2.2. 수치해석 결과 111
4.2.3. 설계 주안사항 120
4.3. PCP 채널 121
4.3.1. 채널의 형태 121
4.3.2. 수치해석 모델 123
4.3.3. 수치해석 결과 124
4.3.4. 설계 주안사항 127
4.4. PCP 충전재 129
4.4.1. 충전재의 기능 및 종류 129
4.4.2. 수치해석 결과 130
4.4.3. 설계 주안사항 136
4.5. 소결 137
제5장 PCP 시공안전성 확보를 위한 수치해석 140
5.1. PCP 시공 중 외기온도 140
5.1.1. 외기온도에 의한 PCP 슬래브의 초기변형 140
5.1.2. 수치해석 결과 141
5.1.3. 시공 주안사항 142
5.2. PCP 리프팅 안전장치 143
5.2.1. 표준 Type 결정 144
5.2.2. 상재하중 145
5.2.3. 표준 Type별 구조해석 146
5.2.4. 구조안전성 검토 148
5.2.5. Lifting Guide Frame 설계표준 152
5.3. 소결 153
제6장 Double-layered PCP 기술 154
6.1. D-PCP 개요 154
6.2. D-PFRCP 156
6.2.1. 특징 및 적용성 156
6.2.2. 환경하중에 의한 D-PFRCP의 구조적 거동 159
6.2.3. 차량하중에 의한 D-PFRCP의 구조적 거동 165
6.3. D-PPECP 171
6.3.1. 특징 및 적용성 171
6.3.2. 환경하중에 의한 D-PPECP의 구조적 거동 173
6.3.3. 차량하중에 의한 D-PPECP의 구조적 거동 179
6.4. D-PLMCP 185
6.4.1. 특징 및 적용성 185
6.4.2. 환경하중에 의한 D-PLMCP의 구조적 거동 186
6.4.3. 차량하중에 의한 D-PLMCP의 구조적 거동 192
6.5. 소결 198
제7장 결론 및 향후 연구방향 200
7.1. 연구결과 200
7.1.1. PCP 모델 개발 200
7.1.2. PCP 최적설계를 위한 수치해석 201
7.1.3. PCP 시공안전성 확보를 위한 수치해석 203
7.1.4. Double-layered PCP 기술 204
7.2. 종합결론 206
7.3. 향후 연구방향 208
REFERENCES 209
ABSTRACT 214
Figure 1.1. Super-Slab 27
Figure 1.2. Test Construction of PCP 27
Figure 2.1. Principal Stress of Slab due to Lifting 32
Figure 2.2. Stress Analysis of Lifting Bolt 34
Figure 2.3. Optimal Lifting Position of Concrete Slab 37
Figure 2.4. Pocket Type Precast Concrete Slab 38
Figure 2.5. Warped Slab 38
Figure 3.1. Precast Concrete Slabs 39
Figure 3.2. Dowel and Tie Grout holes 40
Figure 3.3. Details of Dowel Pocket 40
Figure 3.4. Details of Tie Pocket 41
Figure 3.5. Channels and Bedding Grout Holes 41
Figure 3.6. Example of PCP Shop Drawing 42
Figure 3.7. PCP Model by ABAQUS/CAE 43
Figure 3.8. Slab Size for PCP Model 44
Figure 3.9. Parts of PCP Model 44
Figure 3.10. Definition of Paths 45
Figure 3.11. Non-shrink Mortar Filler in Dowel Slots 47
Figure 3.12. Reinforcement Element(solid) 48
Figure 3.13. Contact Elements of Concrete and Dowel Bar Surface 49
Figure 3.14. General Cross Section of Rigid Pavement 50
Figure 3.15. Elastic Solid Foundation for PCP Model 51
Figure 3.16. Ground Contact Shape of Tire due to Axle Load 53
Figure 3.17. Ground Contact Area of Tire 53
Figure 3.18. Traffic Loads 54
Figure 3.19. Loading Position of Single Axle 55
Figure 3.20. Loading Position of Tandem Axle 55
Figure 3.21. Solid Element Shape 56
Figure 3.22. Commonly used Element Families 56
Figure 3.23. 3D Finite Element Model of JCP and PCP 57
Figure 3.24. Displacement due to Curl up at Path-1 59
Figure 3.25. Displacement due to Curl down at Path-1 59
Figure 3.26. Displacement due to Curl up at Path-2 60
Figure 3.27. Displacement due to Curl down at Path-2 60
Figure 3.28. X-dir. Tensile Stress due to Curl up at Path-1-1 61
Figure 3.29. X-dir. Tensile Stress due to Curl down at Path-1 61
Figure 3.30. Y-dir. Tensile Stress due to Curl up at Path-2-1 62
Figure 3.31. Y-dir. Tensile Stress due to Curl down at Path-2 62
Figure 3.32. Max Displacement and Tensile Stress due to Curl up 63
Figure 3.33. Max Displacement and Tensile Stress due to Curl down 63
Figure 3.34. Regression Analysis of Longitudinal Stress 66
Figure 3.35. Regression Analysis of Transverse Stress 66
Figure 3.36. Coordinate Axis of Infinite Slab 67
Figure 3.37. Temperature Difference 69
Figure 3.38. Coordinate Axis of finite Slab 70
Figure 3.39. Bradbury's Warping Stress Coefficients 72
Figure 3.40. Equivalent Spring Constant 74
Figure 3.41. Field Test of PCP 76
Figure 3.42. LVDT Installation 76
Figure 3.43. Temperature due to Depth of Slab 77
Figure 3.44. Temperature Gradient 77
Figure 3.45. Displacement by Curling Behavior 78
Figure 3.46. Max Displacement due to Curl down by 3D FEM 78
Figure 3.47. Max Displacement due to Curl up by 3D FEM 79
Figure 3.48. Deformed Shape due to Curl up 81
Figure 3.49. Deformed Shape due to Curl down 81
Figure 3.50. JCP Displacement due to Curl up at Path-1 82
Figure 3.51. JCP Displacement due to Curl down at Path-1 82
Figure 3.52. PCP Displacement due to Curl up at Path-1 83
Figure 3.53. PCP Displacement due to Curl down at Path-1 83
Figure 3.54. Max Displacement due to Curl up 84
Figure 3.55. Max Displacement due to Curl down 85
Figure 3.56. Contact Pressure of Lean Concrete Base due to Curl up 85
Figure 3.57. Contact Pressure of Lean Concrete Base due to Curl down 86
Figure 3.58. Longitudinal Tensile Stress Contour 87
Figure 3.59. X-dir. Tensile Stress due to Curl up at Path-1-1 87
Figure 3.60. X-dir. Tensile Stress due to Curl down at Path-1 88
Figure 3.61. Y-dir. Tensile Stress due to Curl up at Path-2-1 88
Figure 3.62. Y-dir. Tensile Stress due to Curl down at Path-2 89
Figure 3.63. Deformed shape due to Corner Loading (Single Axle) 90
Figure 3.64. Deformed shape due to Edge Loading (Single Axle) 90
Figure 3.65. Deformed shape due to Interior Loading (Single Axle) 90
Figure 3.66. Displacement Contour due to Corner Loading 91
Figure 3.67. Displacement due to Corner Loading at Path-3 91
Figure 3.68. Displacement due to Edge Loading at Path-3 92
Figure 3.69. Displacement due to Interior Loading at Path-2 92
Figure 3.70. Max Displacement due to Loading Positions 93
Figure 3.71. X-dir. Tensile Stress Contour due to Edge Loading 94
Figure 3.72. Longitudinal Max Tensile Stress due to Loading Positions 94
Figure 3.73. Transverse Max Tensile Stress due to Loading Positions 95
Figure 3.74. Y-dir. Tensile Stress Contour due to Interior Loading 95
Figure 3.75. Deformed Shape due to the Tandem Axle Loading Position 97
Figure 3.76. Displacement of JCP and PCP at Path-1 98
Figure 3.77. Y-dir. Tensile Stress due to Interior Loading at Path-2 98
Figure 3.78. Transverse Max Tensile Stress due to Loading Positions (Single Axle) 99
Figure 4.1. Displacement Difference due to Thickness of Base in case of Curl up 102
Figure 4.2. Displacement Difference due to Thickness of Base in case of Curl down 102
Figure 4.3. PCP Models due to Thickness of Lean Concrete Base 103
Figure 4.4. Displacement due to Curl up at Path-1 104
Figure 4.5. Displacement due to Curl down at Path-1 104
Figure 4.6. Displacement due to Curl up at Path-2 105
Figure 4.7. Displacement due to Curl down at Path-2 105
Figure 4.8. X-dir. Tensile Stress due to Curl up at Path-1-1 106
Figure 4.9. X-dir. Tensile Stress due to Curl down at Path-1 106
Figure 4.10. Y-dir. Tensile Stress due to Curl up at Path-2-1 107
Figure 4.11. Y-dir. Tensile Stress due to Curl down at Path-2 107
Figure 4.12. Max Displacement and Tensile Stress due to Curl up 108
Figure 4.13. Max Displacement and Tensile Stress due to Curl down 108
Figure 4.14. Displacement due to Curl up at Path-1 111
Figure 4.15. Displacement due to Curl down at Path-1 111
Figure 4.16. Displacement due to Curl up at Path-2 112
Figure 4.17. Displacement due to Curl down at Path-2 113
Figure 4.18. X-dir. Tensile Stress due to Curl up at Path-1-1 113
Figure 4.19. X-dir. Tensile Stress due to Curl down at Path-1 114
Figure 4.20. Y-dir. Tensile Stress due to Curl up at Path-2-1 115
Figure 4.21. Y-dir. Tensile Stress due to Curl down at Path-2 115
Figure 4.22. Max Displacement and Tensile Stress due to Curl up 116
Figure 4.23. Max Displacement and Tensile Stress due to Curl down 116
Figure 4.24. Contact Pressure of Soil Base 117
Figure 4.25. Contact Pressure of Lean Concrete Base 118
Figure 4.26. Contact Pressure of Asphalt Base 118
Figure 4.27. Channel Type A 121
Figure 4.28. Channel Type B 122
Figure 4.29. Channel Type C 122
Figure 4.30. PCP Model for Channel Type A 123
Figure 4.31. Model for Channel Type B 123
Figure 4.32. PCP Model for Channel Type C 123
Figure 4.33. Displacement due to Curl up at Path-1 124
Figure 4.34. Displacement due to Curl down at Path-1 124
Figure 4.35. Displacement due to Curl up at Path-2 125
Figure 4.36. Displacement due to Curl down at Path-2 125
Figure 4.37. X-dir. Tensile Stress due to Curl down at Path-1 126
Figure 4.38. Y-dir. Tensile Stress due to Curl down at Path-2 126
Figure 4.39. Channel Grout Hole and Air Vent Hole 128
Figure 4.40. Displacement due to Curl up at Path-1 130
Figure 4.41. Displacement due to Curl down at Path-1 130
Figure 4.42. Displacement due to Curl up at Path-2 131
Figure 4.43. Displacement due to Curl down at Path-2 131
Figure 4.44. X-dir. Tensile Stress due to Curl up at Path-1-1 132
Figure 4.45. X-dir. Tensile Stress due to Curl down at Path-1 132
Figure 4.46. Y-dir. Tensile Stress due to Curl up at Path-2-1 133
Figure 4.47. Y-dir. Tensile Stress due to Curl down at Path-2 133
Figure 4.48. Max Displacement and Tensile Stress due to Curl up 134
Figure 4.49. Max Displacement and Tensile Stress due to Curl down 134
Figure 5.1. A Case of Curl down during Construction 140
Figure 5.2. A Case of Curl up during Construction 140
Figure 5.3. Calculation Procedure of Final Displacement 141
Figure 5.4. Final Displacement due to Curl down during Construction 141
Figure 5.5. Lifting Guide Frame 143
Figure 5.6. Type A 144
Figure 5.7. Type B 144
Figure 5.8. Type C 145
Figure 5.9. Type D 145
Figure 5.10. 3D Frame Model for Design of Lifting Guide Frame 146
Figure 5.11. Section Force of Type A(L:A.F.D, R:B.M.D) 146
Figure 5.12. Section Force of Type B(L:A.F.D, R:B.M.D) 147
Figure 5.13. Section Force of Type C(L:A.F.D, R:B.M.D) 147
Figure 5.14. Section Force of Type D(L:A.F.D, R:B.M.D) 147
Figure 6.1. Variety of D-PCP 154
Figure 6.2. PCP Model 155
Figure 6.3. D-PCP Model 155
Figure 6.4. D-PFRCP System 157
Figure 6.5. Elastic Modulus of SFRC due to Fiber Contents 158
Figure 6.6. Displacement due to Curl up at Path-1 159
Figure 6.7. Displacement due to Curl down at Path-1 159
Figure 6.8. Displacement due to Curl up at Path-2 160
Figure 6.9. Displacement due to Curl down at Path-2 160
Figure 6.10. X-dir. Tensile Stress due to Curl up at Path-1-1 161
Figure 6.11. X-dir. Tensile Stress due to Curl down at Path-1 161
Figure 6.12. Y-dir. Tensile Stress due to Curl up at Path-2-1 162
Figure 6.13. Y-dir. Tensile Stress due to Curl down at Path-2 162
Figure 6.14. Max Displacement and Tensile Stress due to Curl up 163
Figure 6.15. Max Displacement and Tensile Stress due to Curl down 163
Figure 6.16. Displacement Contour due to Comer Loading 165
Figure 6.17. Displacement due to Comer Loading at Path-3 165
Figure 6.18. Displacement due to Edge Loading at Path-3 166
Figure 6.19. Displacement due to Interior Loading at Path-2 166
Figure 6.20. Max Displacement due to Loading Positions 167
Figure 6.21. X-dir. Tensile Stress Contour due to Edge Loading 168
Figure 6.22. Longitudinal Max Tensile Stress due to Loading Positions 168
Figure 6.23. Transverse Max Tensile Stress due to Loading Positions 169
Figure 6.24. Y-dir. Tensile Stress Contour due to Interior Loading 169
Figure 6.25. D-PPECP System 171
Figure 6.26. Displacement due to Curl up at Path-1 173
Figure 6.27. Displacement due to Curl down at Path-1 173
Figure 6.28. Displacement due to Curl up at Path-2 174
Figure 6.29. Displacement due to Curl down at Path-2 174
Figure 6.30. X-dir. Tensile Stress due to Curl up at Path-1-1 175
Figure 6.31. X-dir. Tensile Stress due to Curl down at Path-1 175
Figure 6.32. Y-dir. Tensile Stress due to Curl up at Path-2-1 176
Figure 6.33. Y-dir. Tensile Stress due to Curl down at Path-2 176
Figure 6.34. Max Displacement and Tensile Stress due to Curl up 177
Figure 6.35. Max Displacement and Tensile Stress due to Curl down 177
Figure 6.36. Displacement Contour due to Comer Loading 179
Figure 6.37. Displacement due to Comer Loading at Path-3 179
Figure 6.38. Displacement due to Edge Loading at Path-3 180
Figure 6.39. Displacement due to Interior Loading at Path-2 180
Figure 6.40. Max Displacement due to Loading Positions 181
Figure 6.41. X-dir. Tensile Stress Contour due to Edge Loading 182
Figure 6.42. Longitudinal Max Tensile Stress due to Loading Positions 182
Figure 6.43. Transverse Max Tensile Stress due to Loading Positions 183
Figure 6.44. Y-dir. Tensile Stress Contour due to Interior Loading 183
Figure 6.45. D-PLMCP System 185
Figure 6.46. Displacement due to Curl up at Path-1 186
Figure 6.47. Displacement due to Curl down at Path-1 186
Figure 6.48. Displacement due to Curl up at Path-2 187
Figure 6.49. Displacement due to Curl down at Path-2 187
Figure 6.50. X-dir. Tensile Stress due to Curl up at Path-1-1 188
Figure 6.51. X-dir. Tensile Stress due to Curl down at Path-1 188
Figure 6.52. Y-dir. Tensile Stress due to Curl up at Path-2-1 189
Figure 6.53. Y-dir. Tensile Stress due to Curl down at Path-2 189
Figure 6.54. Max Displacement and Tensile Stress due to Curl up 190
Figure 6.55. Max Displacement and Tensile Stress due to Curl down 190
Figure 6.56. Displacement Contour due to Corner Loading 192
Figure 6.57. Displacement due to Corner Loading at Path-3 192
Figure 6.58. Displacement due to Edge Loading at Path-3 193
Figure 6.59. Displacement due to Interior Loading at Path-2 193
Figure 6.60. Max Displacement due to Loading Positions 194
Figure 6.61. X-dir. Tensile Stress Contour due to Edge Loading 195
Figure 6.62. Longitudinal Max Tensile Stress due to Loading Positions 195
Figure 6.63. Transverse Max Tensile Stress due to Loading Positions 196
Figure 6.64. Y-dir. Tensile Stress Contour due to Interior Loading 196
본 연구에서는 프리캐스트 콘크리트 포장(PCP: Precast Concrete Pavement) 공법의 이론적 기반을 다지기 위해 그 동안 수행되지 않았던 PCP에 대한 상세한 3차원 유한요소모델(3D Finite Element Model)을 개발하였고, 이를 이용한 수치해석을 통해 PCP의 구조적 거동을 분석하였다. PCP 모델 개발은 ABAQUS/CAE를 사용하였으며, 전 요소에 대하여 3차원 선형요소를 적용하여 해석을 수행하였다.
PCP 모델의 검증을 위해 Closed Form Solution과 현장 실측자료를 비교 분석하여 모델의 적정성을 검토하였다. Closed Form Solution은 Bradbury의 Warping Stress Equation을 이용하였으며, PCP 모델에 의한 결과와 95% 이상의 일치를 보였다. 그리고 현장 실측자료는 영동고속도로 폐도구간 PCP 보수 시험시공 계측자료를 이용하였으며, 실물 조건에 따른 차이를 감안하면 PCP 모델이 어느 정도 합리적인 값을 보이고 있음을 확인하였다.
개발된 PCP 모델을 이용하여 린콘크리트(Lean Concrete) 두께가 PCP 슬래브의 컬링거동(Curling Behavior)에 미치는 영향을 분석하였고, 기층의 종류에 따른 구조거동의 차이를 분석하였다. 또한 PCP 하부 채널의 형상 및 충전재의 종류에 따라 수치해석을 수행하여 PCP 최적 설계를 위한 주안사항(Recommendations)을 제시하였다. 그리고 시공 중 외기온도가 시공 후 컬링거동에 미치는 영향에 대해 분석하여 시공 시 외기온도의 영향에 대한 주안사항을 제시하였다. 또한, PCP 시공 시 안전성 확보를 위한 연구로써 Lifting Guide Frame에 대해 Type별 구조해석을 수행하고, 설계표준화를 실시하여 PCP 시공 시 활용 가능한 자료를 제시하였다.
마지막으로, 새로운 PCP 기술로 섬유보강 콘크리트(FRC), 폴리에스터 콘크리트(PEC), 라텍스 개질 콘크리트(LMC)를 PCP 슬래브에 적용한 D-PCP(Double-layered Precast Concrete Pavement) 기술을 제안하였다. 그리고 PCP 모델을 이용하여 환경하중과 차량하중 작용 시 D-PCP의 구조적 거동을 PCP와 비교 분석하였으며, 향후 추가 연구 개발을 통한 실용화 가능성을 확인하였다.| 번호 | 참고문헌 | 국회도서관 소장유무 |
|---|---|---|
| 1 | ABAQUS (2007). User’s Manual Version 6.7, Hibbit, Karlsson & Sorensen, Inc., Pawtucket, R. I. | 미소장 |
| 2 | ACI Committee 544 (1978). ‶Measurement of Properties of Fiber Reinforced Concrete″, Journal of ACI, Preceeding Vol. 75, No. 7, pp. 283-289. | 미소장 |
| 3 | (1938). Reinforced Concrete Pavements. Wire Reinforcement Institute, Washington, D.C. | 미소장 |
| 4 | (2010a). ‶Fabrication of Concrete Slabs for Precast Pavement Construction″, Journal of the Korea Concrete Institute Conference, pp. 447-448. | 미소장 |
| 5 | (2010b). ‶Development of Distinctive Elements for Precast Pavements″, Journal of the Korean Society of Road Engineers Conference, pp. 229-234. | 미소장 |
| 6 | (2010c). ‶Construction of Urban Intersection Pavements Using Precast Concrete Paving Techniques″, Journal of the Korean Society of Civil Engineers Conference, pp. 213-216. | 미소장 |
| 7 | Evaluation of Pavement Rehabilitation Using Precast Concrete Slabs and Slab Connection methods | 소장 |
| 8 | (2015). ‶Numerical Analysis of Continuously Reinforced Concrete Pavement and Railway Track″, Doctoral Dissertation, Kyung Hee University. | 미소장 |
| 9 | (2011). ‶Development of Construction Techniques for Precast Concrete Pavements and Analysis of Early-Age Performance″, Doctoral Dissertation, Kyung Hee University. | 미소장 |
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| 13 | (2007b). ‶ Experimental Construction for Repair of Jointed Concrete Pavement Using Precast Slabs″, Journal of the Korean Society of Road Engineers Conference, pp. 335-338. | 미소장 |
| 14 | Optimum Slab-Lifting Positions for Precast Concrete Pavement Construction | 소장 |
| 15 | Features of Critical Tensile Stresses in Jointed Concrete Pavements under Environmental and Vehicle Loads | 소장 |
| 16 | (2008a). ‶Effect of Underlying Layer Modeling on Curling Analysis of Concrete Pavement Slabs″, Journal of the Korean Society of Civil Engineers Conference, pp. 473-476. | 미소장 |
| 17 | Experimental Analysis of Curling Behavior of Concrete Slabs on Grade under Temperature Loading and Underlying Layers' Effects | 소장 |
| 18 | p,p′-DDE fails to reduce the competitive reproductive fitness in Nigerian male guppies ![]() |
미소장 |
| 19 | p,p′-DDE fails to reduce the competitive reproductive fitness in Nigerian male guppies ![]() |
미소장 |
| 20 | (2011a). ‶Investigation of Slab Connection Effectiveness in Precast Concrete Pavements″, Journal of the Korean Society of Road Engineers Conference, pp. 189-192. | 미소장 |
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| 24 | Design Methodology of Gap Slab for Post-Tensioned Prestressed Concrete Pavement | 소장 |
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| 26 | (2009). ‶A Study on the Method of Road-Base Leveling for the Precast Concrete Pavement″, Journal of the Korean Society of Civil Engineers Conference, pp. 3171-3174. | 미소장 |
| 27 | (2015). ‶Comparison of Analysis Results according to Numerical Integration Methods of Precast Concrete Pavement Slabs subjected to Temperature Loads″, Journal of the Korea Concrete Institute Conference, pp. 149-150. | 미소장 |
| 28 | Precast/Prestressed Concrete Institute (1985). PCI Design Handbook - Precast and Prestressed Concrete, Precast/Prestressed Concrete Institute, Chicago, Illinois, 3rd edition. | 미소장 |
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| 30 | Sensitivity Analysis of 3-Dimensional FE Models for Jointed Concrete Pavements | 소장 |
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