本文利用有限元素軟體ABAQUS來分析複合材料圍束混凝土構材之軸向抗壓強度與其應力－應變曲線之行為。主要是藉由考慮真實的材料行為，提出較合理的非線性分析模式，利用有限元素軟體ABAQUS來執行此非線性的數值計算，經由與現有的實驗資料驗證，以確定分析模式的正確性。並討論混凝土強度、寬厚比、圍壓、混凝土軟化參數與圍束混凝土之應力應變的關係.
本文分別採九組不用強度、複合材料厚度的試體實驗做比較，結果顯示，在調整適當的圍壓值及混凝土軟化參數之後，可以準確的預測出複合材料圍束混凝土構材的軸向抗壓強度。且其應力－應變曲線的趨勢皆與實驗數據相當吻合，證明在單軸壓力作用下，本文所建議之分析模式合理且精確。

This paper use ABAQUS software to analyze uneasily compressive loading and relationship of axial loading and axial strain of the concrete confined by fiber reinforced polymer (FRP) composite jackets. Mainly propose more rational nonlinearity and analyze the way by considering the true material behavior, make use ABAQUS to carry out this non-linear number value to calculate. Via verifying with the existing experiment materials, exactness by way of confirming and analyzing.
And the relation that the stress-strain of discussing the different concrete , width-to-thickness ratio(D/t), lateral pressure (fl)and parameter of concrete softening(k3) of concrete confined by FRP.
This paper compares nine groups’ specimens of different strength of concrete, thickness of composite. The result shows, after adjusting lateral pressure (fl) value and parameter of concrete softening, the prediction that can be accurate encloses the axial compression strength of a bunch of concrete. And the trends of its stress-strain curve are all quite identical with the experimental data, the analysis way to prove this model of this paper is rational and accurate.

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