| 研究生: |
陳晟淯 Chen, Sheng-Yu |
|---|---|
| 論文名稱: |
電焊用背墊鈑對於結構接頭的影響 Mechanical Effect of the Welded Connections due to the Backing Bar |
| 指導教授: |
朱聖浩
Ju, Shen-Haw |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系碩士在職專班 Department of Civil Engineering (on the job class) |
| 論文出版年: | 2010 |
| 畢業學年度: | 98 |
| 語文別: | 中文 |
| 論文頁數: | 74 |
| 中文關鍵詞: | 背襯鈑 、試驗 、鋼結構 、電銲 |
| 外文關鍵詞: | Backing, Experiment, Steel structure, Welded. |
| 相關次數: | 點閱:86 下載:2 |
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因台灣位置地震區域,所以鋼構建築物漸漸受到重視,其主要本體結構鋼鈑的材質也因時代的演變不斷的進步更新,故大部份結構設計者都會把電銲用的背襯鈑要求與本體同材質,並認為電銲用的背襯鈑會影響到接頭的強度。但實際執行面上是有困難的,目前國內有能力研發新的鋼鈑廠商,並無施作背襯鈑(Backing Strip簡稱Backing.),只有利用下游廠商向上游購買鋼胚自行處理,故背襯鈑的取得就受到一定的限制。
本次研究係在探討利用背襯鈑電銲後的實體材料在萬能材料實驗機作拉力試驗,並利用延伸器量測應變的能力,直到實體材料破壞,可了解破壞與接頭的關係及應力-應變的曲線。
經實驗結果,只要電銲品質佳,其斷點位置不會在電銲處發生,故背襯鈑的材質不會使電銲處斷裂。試體的降伏強度及抗拉強度皆能符合材質的物理性質。
Steel structure construction has gradually gained its importance owing to the fact that Taiwan is geographically located at earthquake regions. Its main material of construcual steel has also been upgraded and updated as time goes by. Therefore, most structure designers request that backing strip used for electric welding should correspond to the material of main structure, adding that it will influence the intensity of connections.
However, this thesis has its difficulty regarding actual practice. Currently, domestic manufacturers that have research and development of steel do not produce backing (Backing Strip is thereafter abbreviated as Backing). The solution mostly ends up purchasing from downstream manufacturers and that greatly limits the availability of backing.
This research aims at evaluating the stretch ability of welded backing by using Instron 8801 testing machine. The experiment goes till the essential material is destroyed and that helps realize the correlation of stretch and breaking. The result concludes that breaking position will not happen at the welding parts as long as the welding job is well done. The material of backing will not cause any breaking at the welding parts. The material used in the research corresponds to physical quality in the yield stress and ultimate stress.
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