An evaluate mode of Prestress losses ofcantilever bridge
碩士 === 逢甲大學 === 土木及水利工程所 === 93 === The aim of this study is to establish a numerical model to simulate the loss of prestress in the long span cantilever bridge. The SAP2000N is employed to model the Song-Jian Bridge that was built in 1982. A so called “loading balance method” is used in modeling th...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/41455494291575812207 |
| Summary: | 碩士 === 逢甲大學 === 土木及水利工程所 === 93 === The aim of this study is to establish a numerical model to simulate the loss of prestress in the long span cantilever bridge. The SAP2000N is employed to model the Song-Jian Bridge that was built in 1982. A so called “loading balance method” is used in modeling the prestressed beam element and the numerical results are compared with those obtained by using the tendon element in SAP2000N. Totally 18 tendons with prestress are modeled according the original design of Song-Jian Bridge.
The correct camber at the middle of the Song-Jian Bridge is correctly reproduced from the SAP2000N model. The prestress loss in each tendon is assumed to release proportionally till the camber loss measured by horizontal survey performed recently is matched. The standard specifications for Highway bridge and flexural analysis are used to evaluate the prestress loss effect to the bridge safety. It is found that the
numerical model proposed in this study can effectively forecast the behavior of prestress loss and long-term displacement of prestressed bridge.
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