玻璃纖維強化高分子複合材料I型梁-版系統力學行為之研究

A Study on the Structural Test and Mechanical Behavior of the GFRP I Beam Superstructure

陳彥鈞(Yen-Chun Chen)

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)

摘要

本論文利用玻璃纖維強化高分子(Glass Fiber Reinforced Plastic, GFRP)複合材料質量輕、耐腐蝕、高比強度之特點，克服現有橋梁耐久性與工期等問題。惟因GFRP材料剛性低，使得橋梁之撓度過大，故考量使用以I型梁所組成之梁-版結構系統以提升整體結構勁度。I型斷面除了容易組裝施工外，更可於梁-版系統結構中，利用端隔梁提供I型梁足夠的側向支撐，克服側向扭轉挫屈的問題。本論文之研究方式主要是對梁-版系統以三點抗彎試驗進行測試，試體尺寸為實際橋梁之縮尺，亦進行較大縮尺之試體進行試驗，探討其尺寸效應之影響。此外，考量到橋梁跨徑較長時，需要續接之情況，亦會進行接合處之續接試驗，探討接合處之行為。最後以有限元素和理論進行分析，並與試驗結果進行驗證比較，並提出FRP橋梁之分析方式。本研究可應用於災區及擴寬橋梁路幅，亦可縮短橋梁興建之時間，改善傳統式橋梁需耗費大量人力及施工時間長等缺點，並提升使用年限。

關鍵字

FRP ； 玻璃纖維 ； 梁-版系統 ； 三點抗彎試驗 ； FRP梁續接

並列摘要

In Taiwan, the life cycle of the bridges can be substantially reduced by local environmental factors, such as monsoons and the impact of high humidity and high chloride conditions. A solution was necessary to solve the problems of reducing maintenance costs and widening existing bridges, or even providing bridges for emergency disaster relief. This research examines the characteristics of the Glass Fiber Reinforced Plastic (GFRP) composite materials which are light weight, not subject to corrosion, and have a high tensile strength-to-weight ratio. This product has been utilized in the production of a small-scale model GFRP bridge superstructure (girder-deck) system, then analysed using finite-element method and structural analysis program. The small-scale superstructure systems was performed by three-point bending test. The force-displacement relationships and their corresponding failure modes of the GFRP superstructure will be recorded and discussed. In the meantime, the numerical analysis results by using finite-element method will compare with the experimental results. The different types of the girder to girder connections were proposed in this research. The small-scale girder to girder connections will be performed by three-point bending test also. The research results can be applied to those FRP bridges in disaster areas and also be used to widen the existing bridges.

並列關鍵字

FRP ； GFRP ； I girder ； Beam-Deck System ； Small-scale suprastructures, ； Girder to girder connections ； Tree-point bending test

參考文獻

[25] 甘淑婷，混編纖維複合梁構件之三點抗彎實驗及力學行為探討，台北：碩士論文，國立臺北科技大學土木與防災技術研究所，2011。

[27] 吳嘉濠，FRP橋面版構件於三點抗彎測試與有限元素分析之研究，台北：碩士論文，國立臺北科技大學土木與防災技術研究所，2012。

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