| 研究生: |
林宏昀 Lin, Hung-Yun |
|---|---|
| 論文名稱: |
RC構架內含有開口填入式磚牆面內側向加載試驗與側推分析模型建立 In-plane Load Test and Pushover Analysis Model for Infilled Masonry Panel with Opening in RC Frame |
| 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: | 2023 |
| 畢業學年度: | 111 |
| 語文別: | 中文 |
| 論文頁數: | 329 |
| 中文關鍵詞: | 填入式磚牆 、開口 、面內 、側推分析 |
| 外文關鍵詞: | Infilled Masonry, Opening, In-plane, Pushover Analysis |
| 相關次數: | 點閱:117 下載:11 |
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台灣現存中高樓層集合住宅常以填入式磚牆作為隔間牆,此類磚牆通常被視為非結構牆,但過去研究顯示隔間磚牆可提供相當的剛度及強度貢獻,且可能改變構架的破壞模式。因此本文以集合住宅為原型,規劃一組足尺RC構架內含有偏心門型開口之0.5B填入式磚牆試體,進行面內往復側推試驗,驗證現有側推分析方法,並提出一套新建側推分析模型,提供使用此類磚牆建物之耐震評估使用。
側推試驗結果顯示,試體柱牆介面於試驗初期即開裂,柱牆各自變形,構架於反向加載時無法帶動磚牆。磚牆出現對角拉力破壞後試體達極限強度,試驗中期發生磚牆面外翻覆後,試體受力行為趨近空構架。鄰牆柱與獨立柱之破壞模式皆為撓曲破壞後發生韌性剪力破壞。由於柱勁度及強度明顯高於0.5B磚牆,磚牆雖有抑制鄰牆柱變形的情形,但並未改變鄰牆柱破壞模式。
與相同高寬比但牆柱勁度比不同之試體相比,可知牆柱勁度比變化造成之影響主要出現在磚牆破壞後。牆柱勁度比較低時,磚牆不足以束制構架並改變柱之破壞模式,柱仍呈現韌性撓曲破壞。牆柱勁度比較高時,磚牆則會對鄰牆柱造成較大集中剪力並使構架柱破壞模式改變為剪力破壞。
本文蒐集國內外含填入式磚牆構架試體,以臺灣結構耐震評估側推分析法TEASPA 4.2進行側推分析,與試驗結果比較,顯示TEASPA 4.2於有效剛度之預測有明顯低估之趨勢。本文提出一新建分析模型,並討論磚牆等值斜撐配置方式之影響,與試驗結果之比較顯示本文新建模型分析曲線較TEASPA 4.2貼近試驗曲線,,可修正TEASPA 4.2有效剛度低估之問題,且極限強度預測與試驗結果相近。本文提出雙斜撐與單同心斜撐兩種分析模式,前者設定流程較為繁複,但可反映柱牆互制改變柱破壞模式之現象;後者較為簡易,可用於柱無剪力破壞疑慮或崩塌可能性較低的樓層。
One full-scale infilled masonry with an opening in RC frame was set for cyclic lateral load test. The test showed that interface between the column and wall cracked at first. The specimen reached its ultimate strength after diagonal tensile failure of the panel wall. The RC frame occurred flexural failure, followed by ductile shear failure. Panel wall did not alter the column's failure mode.
Comparing specimens with the same aspect ratio but different wall-to-column stiffness ratios, specimens with lower wall-to-column stiffness ratios showed ductile behavior. On the other hand, specimens with higher wall-to-column stiffness ratios occurred shear failure at the end.
Pushover analysis was conducted using current model TEASPA 4.2 and a new-proposed model. The analysis was compared with experimental results. It was found that TEASPA 4.2 tended to significantly underestimate the effective stiffness. The new analytical model predicted stiffness more precisely, compared to TEASPA 4.2.
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