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| Numerical simulation study on FRP-concrete-steel double-skin tubular short columns under axial compression |
| Received:August 06, 2009 Revised:November 18, 2009 |
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| DOI：10.7511/jslx201105013 |
| KeyWord:FRP-concrete-steel double-skin tubular column axial compression numerical simulation damage type double-skin tubular eigenvalue |
| Author | Institution |
| 胡波 |
同济大学 建筑工程系,上海 |
| 王建国 |
合肥工业大学 土木与水利工程学院,合肥 |
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| Abstract: |
| In order to discuss compression behavior and constraint mechanism, FRP-concrete-steel double-skin tubular short columns under axial compression are analyzed by using nonlinear finite element analysis program ANSYS. Different element type is selected to simulate FRP tube with different production process. It is assumed that the strength of concrete is constant after achieving the compressive strength. The calculating results are in good agreement with experimental results. There are three damage types with FRP-concrete-steel double-skin tubular short columns. The calculating formula of damage index is proposed. The constraint to concrete is influenced by whether FRP tube is subject to axial stress. The relationship of ultimate strength and strain of confined concrete with double-skin tubular eigenvalue is derived. |