| 研究生: |
趙彥棻 Chao, Yen-Fen |
|---|---|
| 論文名稱: |
RC構架內含填入式開口磚牆面內側向加載試驗與分析 Experiment of In-filled Masonry Panels with Openings in RC Frames under In-plane Loading |
| 指導教授: |
杜怡萱
Tu, Yi-Hsuan |
| 學位類別: |
碩士 Master |
| 系所名稱: |
規劃與設計學院 - 建築學系 Department of Architecture |
| 論文出版年: | 2015 |
| 畢業學年度: | 103 |
| 語文別: | 中文 |
| 論文頁數: | 494 |
| 中文關鍵詞: | 填入式磚牆 、開口 、面內 、往復加載 |
| 外文關鍵詞: | in-filled masonry, opening, in-plane, cyclic loading |
| 相關次數: | 點閱:206 下載:483 |
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既有低層RC建物中常以磚牆作為隔間牆,過去多以加強磚造構法砌築,但已逐漸被填入式構法取代。因機能需求,構架內磚牆常留有門、窗開口,且因開口形式及構架性質差異,使其受力行為與破壞模式變得複雜,分析不易。因此本文針對含填入式有開口磚牆RC構架,進行面內方向側推試驗,期望能深入了解其受力行為,並提供耐震分析理論模型建立之參考。
本文試驗包含兩組足尺試體,一組為含填入式門型開口磚牆構架,另一組為此式體於試驗後打除磚牆部分所餘之純構架試體。試體以典型三層RC街屋中底層最後一跨短向構架為原型,構架跨距3950mm,淨高2700mm。試驗中模擬原型建物之靜載重,施加固定大小軸壓力,側力以位移控制之往復加載方式施加。
試驗結果顯示,含填入式磚牆試體於側力加載後,磚牆與構架介面即開裂,隨側位移增加,柱與牆變形行為趨於獨立,門型開口兩側磚牆皆為灰縫滑移破壞之剪力破壞,柱於試驗中呈現雙曲率變形及撓曲行為,但未嚴重破壞。而純構架試體則是先發生撓曲破壞後再發生韌性剪力破壞。試驗顯示,有開口填入式磚牆僅些微束制柱變形與轉角,但並未改變其破壞模式。
與同樣開口形式之加強磚造試體相比,加強磚造構法柱牆構成複合斷面,使試體初始剛度與極限強度較高,破壞變位較小。加強磚造磚牆亦為剪力破壞,但為對角壓力控制,且磚牆剪力裂縫延伸至柱,亦改變柱之破壞模式。
本文分別依FEMA 356、陳奕信博士、莊宗樺博士既有分析模型計算磚牆性能曲線,與RC柱性能曲線疊加得整體理論性能曲線與本文試驗結果比較。結果顯示有開口填入式磚牆不適合以窗間牆模式分析。若以三邊圍束磚牆模式分析,依照本文修正FEMA 356填入式磚牆性能曲線,軸力以柱牆EA比例分配且極限變位角依莊宗樺博士建議方式計算時,所繪出之曲線與試驗較相符。
This study tested two specimens: An in-filled masonry panel with a door opening in a reinforced concrete (RC) frame called specimen ID, and a bare RC frame called specimen BF. To reuse the RC frame of specimen ID, we removed the panels after the test. Both specimens were tested under lateral cyclic loading and constant vertical force.
Test results show that the panels and columns of specimen ID separated soon after the loading started. The panels were failed in bed-joint sliding. Flexural cracks appeared at both ends of the columns; however, they were not seriously damaged. The columns of specimen BF exhibited double curvature deformation, and failed in flexural mode at maximum load. Comparison between the two specimens shows that the in-filled masonry panels increased the strength and the stiffness if the frame and did not affect the failure mode of the columns.
The capacity curves of the columns and panels were calculated independently, and then superposed to get the analytical curve of the whole frame. Comparison with the test result shows that using modified FEMA356 model with the axial force distributed by the axial stiffness ratio to the columns and panels can provide a reasonable estimation.
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