原文传递
ANALYSIS OF IN-SERVICE JOINTLESS BRIDGES.
| 题名： | ANALYSIS OF IN-SERVICE JOINTLESS BRIDGES. |
| 作者： | Thippeswamy-HK; GangaRao-HVS |
| 关键词： | JOINTLESS-BRIDGES; FIELD-STUDIES; MULTISPAN-BRIDGES; STRUCTURAL-BEHAVIOR; PRIMARY-LOADS; SECONDARY-LOADS; BOUNDARY-CONDITIONS; STRESSES-; TEMPERATURE-EFFECTS; CREEP-; SHRINKAGE-; EARTH-PRESSURES; SETTLEMENT-STRUCTURAL |
| 摘要： | Jointless bridge systems are designed currently for primary loads only: for example, live load and dead load. The only secondary load that is considered while designing a jointless bridge is the temperature load. With respect to other secondary loads, such as creep and shrinkage of the superstructural material, it is assumed that the effects of creep and shrinkage are opposite in nature and cancel out each other. Designers have different opinions on earth pressure and settlement loads. To develop a proper explanation for jointless bridge behavior, a better insight into the performance of jointless bridges is needed in terms of primary as well as secondary loads. Five in-service jointless bridges were analyzed for primary and secondary loads by the state-of-the-art methods. The analytical data generated for one bridge are synthesized and presented. The discussion includes effect of primary and secondary loads, effect of secondary loads with respect to primary loads, and effect of different systems (boundary conditions) on stresses at various locations. The results reveal that the combination of integral stub abutment and a single row of piles makes the substructure flexible, thereby reducing the stresses at superstructure and abutment joint. The weak axis orientation of piles further reduces stresses at superstructure and abutment joint. The major contributor to total stresses is the temperature load. Creep of superstructural material is helpful in reducing the stresses at some locations. Shrinkage relieves creep to some extent but not completely. Earth pressure causes negligible stresses at all locations in the bridge. Settlement stresses are considerable in multispan jointless bridges. |
| 总页数： | Transportation Research Record. 1995. (1476) pp162-170 (2 Fig., 5 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- IN-SERVICE PERFORMANCE OF INTEGRAL BRIDGES AND JOINTLESS DECKS.
- Analysis of an Instrumented Jointless Bridge. Final rept. (Aug. 2000 - July 2002).
- Analysis of an Instrumented Jointless Bridge.
- Behavior of Jointless High Performance Concrete Bridges.
- PROTOTYPE TESTING OF INTELLIGENT STIFFENER FOR BRIDGES AT I-35 WALNUT CREEK BRIDGE.
- “Superstructure/Substructure Joint Details’"
检索历史
应用推荐
