A Study on Dynamic Behaviors of Steel Plate Girder bridge with Applying External Post-Tensioning Method

외부 외부 외부

외부 후긴장 후긴장 후긴장 공법 후긴장 공법 공법 적용에 공법 적용에 적용에 따른 적용에 따른 따른 따른 무도상 무도상 무도상 무도상 판형교의 판형교의 판형교의 판형교의 동적거동 동적거동 동적거동 동적거동 분석분석분석분석 A A

A A Study Study Study Study on on on on Dynamic Dynamic Dynamic Dynamic Behaviors Behaviors Behaviors Behaviors of of of of Steel Steel Steel Steel Plate Plate Plate Girder Plate Girder Girder bridge Girder bridge bridge bridge with

with with

with Applying Applying Applying Applying External External External Post-Tensioning External Post-Tensioning Post-Tensioning MethodPost-Tensioning MethodMethodMethod

The major objective of this study is to investigate the effects and application of external post-tensioning method for steel plate girder bridge. It analyzed the mechanical behaviors of steel plate girder bridge with applying external post-tensioning on the finite element analysis, field test and laboratory test for the lateral dynamic characteristics. As a result, the reinforcement of steel plate girder bridge the external post-tensioning method are obviously effective for the lateral dynamic response which is non-reinforced. The analytical and experimental study are carried out to investigate the post-tension force decrease lateral acceleration and deflection on steel plate girder bridge for serviceability. And the external post-tensioning method reduce dynamic maximum displacement(about 10～24%), the increase of dynamic safety is predicted by adopting external post-tensioning method. From the dynamic test results of the servicing steel plate girder bridge, it is investigated that the change degree of natural frequency is very low with applying the external post-tensioning method The servicing steel plate girder bridge with external post-tensioning has need of the reasonable reinforcement measures which could be reducing the effect of lateral dynamic behavior that degradation phenomenon of structure by an unusual response characteristic and a drop durability.

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