鋼材在高溫中受潛變的影響會造成變形明顯增加，故潛變對鋼結構在高溫下結構行為之影響是相當重要，本文以加入溫度效應和潛變效應的向量式有限元素法來研究平面鋼結構在高溫環境中受潛變效應的結構行為，並透過相關文獻的試驗與數值分析結果與本文所建立之分析模式進行驗證，以確保所建立之分析模式的正確性；接著再利用本文所建立之數值分析模式，分別探討高溫環境下梁桿件與柱桿件在不同載重比與邊界條件下，桿件因潛變而造成破壞的過程，桿件破壞將以桿件挫屈或潛變變形達到規範規定之潛變破壞準則為判定依據，最後再探討平面鋼構架在高溫中因潛變所造成的影響。

In high temperatures, the deformation of steel increases noticeably due to creep effect, so creep effect is very important for the structural behaviors of steel structures in high temperatures. In this study, the Vector Form Intrinsic Finite Element (VFIFE) method with thermal effect and creep effect was employed to investigate the structural behaviors of plane steel structures in high temperatures. The correctness of the numerical analysis model developed using the VFIFE method was verified by comparing the results with the test and numerical results of the related references. Using the developed numerical analysis model, the failure processes of steel beams and steel columns due to high temperature creep effect under various load ratios and boundary conditions were investigated. The failures of structural members were determined by member buckling or by the creep deformation reaching the failure limit of the code. The structural behaviors of plane steel frames due to the influences of high temperature creep effect were also investigated in this study.

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