研究生: |
林庚達 Keng-ta Lin |
---|---|
論文名稱: |
雙側外力引致SRC梁柱交會區之剪力行為及強度分析 Behavior and Strength of Steel Reinforced Concrete Beam-Column Joints with Two-Side Force Inputs |
指導教授: |
陳正誠
Cheng-Cheng Chen 黃世建 Shyh-Jiann Hwang |
口試委員: |
翁正強
C. C. Weng 陳誠直 C. C. Chen 許協隆 Hsieh-Lung Hsu |
學位類別: |
博士 Doctor |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 237 |
中文關鍵詞: | 鋼骨鋼筋混凝土 、梁柱接頭區 、剪力強度 、軟化壓拉桿模型 、強度疊加法 |
外文關鍵詞: | steel reinforced concrete, beam-column joints, panel zone, SST model |
相關次數: | 點閱:313 下載:10 |
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本文共完成5組十字形大尺寸梁柱子結構之反復載重試驗,探討包覆型SRC結構梁柱接頭區之剪力行為與強度。此外,本文以軟化壓拉桿為基本架構,將鋼骨與RC合成作用考慮在內,開發分析SRC接頭區剪力強度模型,本文稱為SST-SRC模型。
根據載重試驗結果及試驗數據的分析,作成結論如下:(1)SRC梁柱接頭區之遲滯迴圈比RC梁柱接頭區飽滿,消能能力較佳;(2)縱向翼板所能發揮的剪力強度比一般預期者高出甚多,縱向翼板可以提供相當高的梁柱接頭區之剪力強度;(3)在SRC柱-鋼梁構架系統中,梁柱接頭區定義為柱內鋼骨翼板與連續板所圍成的區域,可以合理的反應其行為並準確的預測其剪力強度;(4)梁柱接頭區使用角隅箍筋與鋼骨斷面形成「聯鎖式閉合箍」,可取代傳統閉合箍筋。
本文共蒐集39根SRC深梁試體與16根雙側接梁之SRC梁柱接頭試體,其中3組梁柱接頭試體為本研究所完成的。SST-SRC模型的開發先從深梁切入,進而延伸至梁柱接頭區剪力評估,並與強度疊加法比較。根據分析結果結論如下:(1)SST-SRC模型對於可反應深梁中鋼骨深度之變化,強度疊加法並無法反應此參數;(2)SST-SRC模型在預測SRC梁柱接頭試體之剪力強度時,其強度比值之平均數為1.54,變異係數為0.15;(3)本文建議的強度疊加法為考慮縱向翼板對剪力有貢獻,並且以翼板剪力降伏計算其剪力強度,其試驗值與分析值之比值平均數為1.33,變異係數為0.14,顯示可合理預測梁柱接頭剪力強度,考慮縱向翼板對剪力強度貢獻是合理的。
Experimental results from five large-scale cruciform type beam-column subassemblies showed that: (1) the SRC joint demonstrated more moderate pinching phenomenon than the RC joint; (2) the shear strength provided by the longitudinal flanges of the cross-H steel section was significantly higher than expected; (3) the definition of the joint zone of the SRC column-wide flange beam system should be modified to match experimental observations; and (4) the corner ties can be used to replace joint hoops without demonstrating any negative behaviors. It was also found that the strength superposition method was able to predict the SRC joint shear strength with reasonable accuracy.
This study proposes an analytical method named SST-SRC model for determination of shear strengths of SRC deep beams and beam-column joints. By comparing the predicted results from the SST-SRC model and strength superposition method with the collected test results, which include 39 SRC deep beam specimens and 16 SRC beam-column joint specimens, it was found that: (1) the proposed method is capable of predicting the shear strengths for SRC deep beams with variable depth of steel shape; (2) the average test-to-calculated strength ratio for SRC beam-column joints was 1.54, with a coefficient of variation of 0.15 for the SST-SRC model; (3) the average test-to-calculated strength ratio was 1.33, with a coefficient of variation of 0.14 for the proposed strength superposition method considering the shear strength contribution by the longitudinal flange.
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