摘 要
本文以不同斷面之玻璃纖維強化高分子(glass fiber reinforced plastic, GFRP)複合材料梁構件，組成組合式GFRP梁構件，再以此GFRP組合梁、與GFRP版製作成GFRP梁–版系統，分別進行三點抗彎試驗。將各GFRP組合梁構件及GFRP梁–版系統之極限載重、勁度及破壞模式等，與單一GFRP構件比較。由試驗結果得知GFRP組合梁構件可有效提升強度及勁度，另外採用Timoshenko梁理論解來計算GFRP組合梁構件的力–位移關係。由試驗結果了解各種GFRP組合式梁–版系統結構受力行為，找出較佳提升GFRP組合式梁–版系統勁度及強度的方法。再以ANSYS有限元素分析GFRP組合式梁–版系統，將分析與實驗結果進行比較，二者結果相當吻合。本文透過試驗與分析之方式，進行組合式GFRP梁–版系統破壞模式探討，確保組合型式GFRP梁–版系統應用於公路橋梁的安全性。
關鍵詞：纖維強化高分子、組合式梁、組合式梁–版系統、三點抗彎試驗Abstract
In this paper, different cross–sections of glass fiber reinforced polymer (GFRP) beam members were glued together as the combined GFRP beam members. Then, the GFRP combined beams were glued to GFRP plate to become the GFRP combined beam–deck system. From the three–point bending test results, the ultimate load, stiffness and failure modes of GFRP combined beam members and GFRP combined beam–beam system are compared with a single GFRP member. The experimental results show that GFRP combined beam members can effectively improve the strength and stiffness. The Timoshenko beam theory was used to calculate the force–displacement relationship of GFRP combined beam members. From the three–point bending test result of GFRP combined beam–deck systems, we understand the method can improve the stiffness and strength of GFRP combined beam–deck system. The ANSYS finite element program was used to analyze GFRP composite beam–deck system, and the analysis matches experimental results. Through the experiment and analysis, this paper discusses the failure mode of the combined GFRP beam–deck system and ensures the safety of the combined GFRP beam–deck system can be applied to the highway bridge.
Keywords: Fiber Reinforced Plastic (FRP), Combined Beam, Combined Beam–Deck System, Three–Point Bending Test