| 研究生: |
蔡旻欣 Tsai, Min-Hsin |
|---|---|
| 論文名稱: |
窗型開口型式填入式磚牆材料與面內側向加載試驗 Material and In-plane Load Tests for Infilled Masonry Panels with Window-Type Opening |
| 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: | 2016 |
| 畢業學年度: | 104 |
| 語文別: | 中文 |
| 論文頁數: | 397 |
| 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, Openings, In-plane, Cyclic loading |
| 相關次數: | 點閱:234 下載:11 |
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既有研究顯示,含開口填入式磚牆可為RC構架提供側向剛度及強度貢獻,但可能改變構架破壞模式。本文針對含窗型開口填入式磚牆RC構架,進行面內側向加載試驗,期望深入了解其受力行為,並比對既有分析模型之適用性。另外,進行一系列磚塊、砂漿之材料與小尺寸構件試驗,以探討磚牆結構局部力學特性,及材料與構件強度間之相關性。
基本材料與構件試驗包括砂漿、磚塊、磚墩抗壓試驗,灰縫抗剪試驗以及磚牆對角拉力試驗,並以實心、多孔磚與高強度、一般強度兩種砂漿作為變因。試驗結果顯示,多孔磚之磚塊本身與砌體構件強度均大於實心磚,推測可能因砂漿深入孔洞形成剪力榫作用而提升構件強度。砂漿明顯影響構件試體受力行為,亦是影響磚牆對角拉力強度之主要因素。
填入式窗型開口磚牆試驗為足尺試體,沿用前期試體構架,內填新砌磚牆。試驗中施加固定軸壓力,側力施加方式為位移控制之往復加載。試驗結果顯示,填入式牆體與構架在試驗之初隨即開裂分離,牆體於窗台高處出現水平撓曲裂縫,兩翼磚牆產生滑移。裂縫模式顯示,試驗初期磚牆因窗台存在,開口兩側牆體等值壓桿角度不同,隨窗台以上磚牆滑移後,壓桿位置和受力行為亦發生改變。磚牆最終破壞模式為側傾後對角壓力破壞,柱則於頂部發生剪力破壞。
與前期試體比較,發現同樣開口情況下,加強磚造柱牆互制關係較填入式磚牆明顯;和填入式門形開口試體比較,則可知窗台明顯限制構架變形,使柱形成短柱效應。加強磚造磚牆強度由對角壓桿提供,窗台之存在會使壓桿角度較低而呈現較高之初始剛度及強度;但填入式磚牆滑移後受力行為轉由灰縫滑移機制主導,故窗台雖提升初始剛度,但並未對極限強度造成明顯影響。
本文分別依FEMA 356、趙彥棻碩論修正之FEMA 356模型以及陳奕信博士之既有磚牆分析模型,與RC柱性能曲線疊加得整體理論性能曲線與試驗結果比較。結果顯示以趙彥棻碩論修正之FEMA356模型與陳奕信模型,軸力全施加至柱,磚牆以滑移前剪力元素分析,柱以長短柱模式分析時,所繪出之分析與試驗曲線較為相近。
This thesis includes in-plane load tests for in-filled masonry panel with a window opening in RC frame and the tests between material and member. The result of material and member tests shows that the strength of perforated brick is higher than common brick, and the hole of brick with mortar formed a shear-key which may also enhance the strength. Mortar property significantly affects the behavior of the mechanics, and it is also a main factor of diagonal tensile strength. The result of in-plan load test shows that the boundaries between the panels and the frame cracked, and two wing-walls slid at initial stage. The specimen IW occurred diagonal compression failure after rocking, and the columns occurred the shear failure on the top at later stage. Compared with the previous specimens, the interaction between column and panel is more obvious in confined masonry panels. Sill significantly limited the column deformation and formed the short column effects. The experimental results were compared with FEMA 356, Chao’s modified FEMA 356 and Chen’s model. According to the calculation, Chao’s modified FEMA 356 and Chen’s model were adopted in specific situation, where axial compressive force exerts on columns, the panels use shear element analysis before sliding, the columns consider short columns effect.
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