Temperature Effects in Bridge Condition Evaluation and Capacity Rating in Oklahoma
| 项目名称： | Temperature Effects in Bridge Condition Evaluation and Capacity Rating in Oklahoma |
| 摘要： | Oklahoma's climate ranges from humid subtropical in the east to semi-arid in the west. While summers are long and usually hot, periods of extreme cold during the winter months are infrequent. The daily and seasonal temperature variations acting on a bridge can lead to nonlinear temperature distributions through key structural elements due to low thermal conductivity of concrete and temporal/spatial variation of ambient temperature. For statically indeterminate or geometrically skewed bridges, this temperature variation may induce stresses that represent a significant percentage of the direct stress capacity of the bridge, and may lead to unacceptable performance in service. Finite Element Analysis will be used to perform heat flow and thermal stress analysis. Simplified structural models will be developed in MatLab to obtain accurate and time-efficient thermal stress analysis. Daily and seasonal temperature profiles will be developed for Oklahoma counties based upon Oklahoma Mesonet data to support the consideration of temperature effect in bridge evaluation. Reliability-based assessment of thermal stress development under temperature extremes will be performed. Guidelines that are specific to Oklahoma bridge construction practices and climatology that incorporate temperature effects in bridge evaluation and capacity rating will be developed. |
| 状态： | Active |
| 资金： | 239628.00 |
| 资助组织： | Research and Innovative Technology Administration<==>University of Oklahoma, Norman<==>Oklahoma Department of Transportation |
| 执行机构： | University of Oklahoma, Norman |
| 开始时间： | 20141101 |
| 实际结束时间： | 20161031 |
| 主题领域： | Bridges and other structures；Highways；Maintenance and Preservation；Transportation (General) |
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