GFRP框架採金屬接頭側推實驗與數值分析之研究

A Study on Pushover Test and Numerical Analysis of GFRP Frame with Metal Joints

賴建宇(Jian-Yu Lai)

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(2013年)

摘要

本論文利用拉擠成型之GFRP構件與金屬製接頭進行組裝，再以螺栓進行鎖固，製作成框架試體，試體分成單跨及雙跨總共6組。單跨試體包括原型框架、框架加裝受拉斜撐及框架加裝受壓斜撐；雙跨試體包括原型框架、框架加裝受拉-壓斜撐及框架加裝受壓-拉斜撐，最後將試體進行單向側力施加之試驗，並以SAP2000數值模擬軟體進行分析，再與試驗結果進行驗證比較。
實驗結果發現加裝受拉斜撐之試體，在極限強度、初始勁度以及能量消散之效果皆較原型框架與受壓斜撐框架好；而加裝受壓斜撐之試體破壞模式皆是受壓斜撐先產生挫曲破壞，此時梁、柱構件並未發生損傷，顯示受壓斜撐之次要構件可以做替換補強外，還能為結構提供預警之效果。
另外SAP2000數值模擬軟體之應用，由於實驗之破壞模式，是從接頭螺栓開孔處開裂導致力量下降，此現象使彎矩無法傳遞。因此在軟體設定，是將框架以塑性鉸方式進行設定；而斜撐構件在塑性鉸設定上使用「等值柱概念」進行參數設定，分析結果與實驗比較之誤差皆為4 %以內，顯示分析與實驗吻合，證明使用SAP2000分析軟體除了可以使工程師使用容易上手外，分析結果也有一定精準度。

關鍵字

FRP(Fiber Reinforced Plastic) ； GFRP框架 ； 側推實驗

並列摘要

In this thesis, a GFRP frame is made by assembling GFRP components and metal joints and fastening them with bolts. A total of six specimens were used, and these were divided into single-span and double-span frames. Single-span specimens include a prototype specimen, a tension-braced specimen and a compression-braced specimen. The double-span specimens on the other hand include a prototype specimen, a tension-compression-braced specimen and a compression-tension -braced specimen. Finally the specimens were analyzed in the Pushover test and numerical simulation was done using SAP2000 before comparing the experimental results with the analytical ones.
Experimental results show that the tension-braced specimen has the highest ultimate strength, initial stiffness and the most effective energy dissipation. The compression-braced specimen failed by the buckling of the brace while the rest of frame had no visible failure. This indicates that the secondary member, the compression brace member, which is also replaceable, can provide early warning for the structure.
In the experiment, the force dropped subsequently after the bolt hole cracked because the moment could not be transmitted. For SAP2000, this phenomenon cannot be replicated until a plastic hinge is used. The bracing members of this study use an “equivalent column” plastic hinge concept. Analysis results when compared with the experimental results have an absolute error rate less than 4 %, showing correlation. This proves the use of SAP2000 in making engineers` works easier as the analysis software has a high accuracy.

並列關鍵字

FRP ； GFRP Frame ； Pushover Test

參考文獻

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