FRP橋面版構件於三點抗彎測試與有限元素分析之研究

The Study of Three-Point Bending Test and Finite Element Analysis on FRP Bridge Deck

吳嘉濠(Chia-Hao Wu)

指導教授 ： 李有豐

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00001

摘要

本論文主要在探討纖維高分子複合材料(Fiber Reinforced Plastic, FRP)所製成之橋面版受三點抗彎作用下之力學行為及破壞模式，並應用有限元素分析軟體建立橋面版模型，且依據實驗結果進行比較驗證有限元素模型之正確性。本論文先以國內外FRP橋面版之相關研究及實際施作之案例作為參考依據，進行FRP橋面版試體之設計與實驗之規劃。FRP橋面版試驗採用原型FRP橋面版試驗、FRP橋面版內填不同填充物及FRP橋面版外層包覆不同纖維布之試驗。實驗中採三點抗彎進行測試，以測力計(Load Cell)與位移計(Dial Gauge)測量各組試體受力與變位關係，並進行破壞模式比較。實驗結果顯示原型FRP橋面版受力與變位關係呈線性，無明顯降伏點即產生破壞。由FRP橋面版內填不同填充物之試驗結果可知，在FRP橋面版內填填充物，可有效提升原FRP橋面版之整體強度與勁度；亦於FRP橋面版外層包覆不同纖維布之試驗結果顯示， FRP橋面版外層包覆纖維布，可有效提升原FRP橋面版之圍束力亦可提升其極限強度。最後本論文以FRP版構件進行數值分析軟體ANSYS之有限元素法分析，將分析及實驗結果進行比較，比較結果BFRP及GFRP版構件之分析值皆與實驗值相當接近，故可確認分析模型之準確性。

關鍵字

纖維強化高分子複合材料(Fiber Reinforced Plastic, FRP) ； 橋面版 ； 三點抗彎測試 ； 有限元素分析

並列摘要

This study presents the use of Fiber Reinforced Plastic (FRP) composite bridge deck subjected to three-point bending test to determine the mechanical behaviors as well as the failure modes. Test results were compared with the results taken from Finite-Element Method (FEM) analysis software to verify the accuracy of the Finite-Element model. Three different FRP composite bridge panel types were used for the experiments. One is the prototype panel, an epoxy mortar-filled FRP panel, and the third is an epoxy mortar-filled FRP panel wrapped with carbon fiber. A Load Cell and Dial Gauge were used in the three-point bending test to measure the force-displacement relationship of each specimen and also make a comparison of the failure mode. The results of the prototype FRP bridge deck showed a linear force-displacement relationship; no obvious failure at yielding point. The FRP composite bridge deck filled with different fillers indicated that the infilling materials effectively improved the ultimate strength and stiffness of the original composite deck. And also, the wrapping of the third kind of FRP composite bridge deck with the different fiber patches FRP deck version of the outer layer coated fabric showed that the fiber wrapping increased the confinement and thus enhanced the ultimate strength of the component. Finally, in this study, numerical analysis software, ANSYS, was used to compare the finite element analysis results with that of the experimental results. The results of the comparison on analysis and experiment are very close; which verifies the finite element model's accuracy.

並列關鍵字

Fiber Reinforced Plastic (FRP) ； Bridge deck ； Three-Point Bending Test ； Finite Element Analysis

參考文獻

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