| 中文摘要 | 第3-4页 |
| ABSTRACT | 第4-5页 |
| INTRODUCTION | 第8-11页 |
| 1 CONCRETE BRIDGE CRACKS CAUSES | 第11-19页 |
| 1.1 CAUSES OF THE CRACKS | 第11页 |
| 1.2 ANALYSIS OF CRACKS | 第11-19页 |
| 1.2.1 Analysis of temperature stress | 第12-16页 |
| 1.2.2 Temperature control and measures to prevent cracks | 第16-19页 |
| 2 EFFETS OF TEMPERATURES | 第19-27页 |
| 2.1 CURRENT MODELS FOR THE BEHAVIOR AT ELEVATED TEMPERATURES | 第19-21页 |
| 2.2 EFFETS OF TEMPERATURE STRESS THINKNESS | 第21-27页 |
| 2.2.1 Temperature control | 第23-24页 |
| 2.2.2 the variation of temperature of mass concrete | 第24-25页 |
| 2.2.3 The Variation of the Thermal Stress in Mass Concrete | 第25页 |
| 2.2.4 Temperature Control and Crack Prevention of Mass Concrete | 第25-27页 |
| 3 THERMINAL STRESS | 第27-35页 |
| 3.1 CAUSES OF THERMAL STRESS THE CRACK | 第27页 |
| 3.1.1 The thermal stress of concrete can be approximately represented as | 第27页 |
| 3.2 KINDS OF THERMAL STRESS | 第27-35页 |
| 3.2.1 Thermal stress of massive concrete structure | 第28页 |
| 3.2.2 Shrinkage cracks caused Analysis | 第28-32页 |
| 3.2.3 Steel corrosion cracks cause | 第32-35页 |
| 4 CONSTRUCTION CAUSED CRACKS | 第35-41页 |
| 4.1 CRACKS OF RAW MATERIALS | 第36-37页 |
| 4.2 BRIDGE CRACK CONTROL AND TECHNOLOGY MEASURES | 第37-41页 |
| 4.2.1 Design plan | 第37-39页 |
| 4.2.2 Bridge deck concrete measures crack | 第39-40页 |
| 4.2.3 Supports measures cracking | 第40-41页 |
| 5 CALCULATION AND APPLICATION OF MASS CONCRETECONSTRUCTION TEMPERATURE | 第41-45页 |
| 5.1 CALCULATION ANALYSIS | 第41页 |
| 5.2 ANALYSIS AND CALCULATION OF CONCRETE TEMPERATURE | 第41-45页 |
| 5.2.1 Temperature of various materials | 第41-44页 |
| 5.2.2 Formula for calculating the temperature of large concrete Maximum adiabatictemperature rise | 第44-45页 |
| 6 MATERIALS | 第45-53页 |
| 6.1 CHOISE OF MATERIALS | 第45-47页 |
| 6.2 SITE CONSTRUCTION OPERATION | 第47-53页 |
| 6.2.1 Concrete temperature control– | 第50页 |
| 6.2.2 Quality of construction technology | 第50页 |
| 6.2.3 PRESTRESS LOSSES | 第50-51页 |
| 6.2.4 Prestressed concrete continuous beam bridge | 第51-53页 |
| 7 CONCLUSION | 第53-56页 |
| ACKNOWLEDGEMENT | 第56-57页 |
| REFERENCES | 第57-70页 |
