| 研究生: |
沈笠筠 Shen, Li-Yun |
|---|---|
| 論文名稱: |
低矮型超高性能纖維混凝土結構牆受反覆載重之分析模型 Computational modeling for squat UHPFRC structural walls under displacement reversals |
| 指導教授: |
洪崇展
Hung, Chung-Chan |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2016 |
| 畢業學年度: | 104 |
| 語文別: | 中文 |
| 論文頁數: | 148 |
| 中文關鍵詞: | 結構牆 、超高性能纖維混凝土 、遲滯行為 、有限元素模型 |
| 外文關鍵詞: | Structural walls, Ultra High Performance Fiber Reinforce Concrete (UHPFRC), Hysteretic behaviour, Finite element model |
| 相關次數: | 點閱:225 下載:10 |
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許多研究指出,使用超高性能纖維混凝土材料能有效提升結構的抗剪能力與韌性。根據陳弘錡(2015)的實驗結果顯示,低矮型超高性能纖維混凝土結構牆主要有兩個破壞模式,一是撓剪破壞,二是滑移破壞。目前許多模型對於結構牆的彈性及撓曲行為已經有相當的精準度,但對於結構牆剪力強度的預測,仍有許多待研究部分。本文研究目的在於建立一套能模擬低矮型超高性能纖維混凝土結構牆受彈性、撓曲、剪力行為與剪力滑移行為之分析模型。本文使用有限元素模型,先利用非線性梁柱元素模擬超高性能纖維混凝土結構牆受彈性與彎矩之行為,連接兩個彈簧模型並定義其遲滯行為,分別模擬結構牆的剪力行為與剪力滑移行為。剪力行為是以修正壓立場理論為基礎,建立其破壞側力位移曲線;剪力滑移行為是以規範探討與實驗觀察結果為基礎,建立其破壞側力位移曲線。最後,此研究所發展之分析模型的適用性將透過相關之實驗結果進行驗證(陳弘錡,2015),結果證實此模型除了可以有效模擬低矮型超高性能纖維混凝土結構牆的遲滯迴圈行為,還可以預測其非彈性變形之剪力與滑移的分量。
A number of studies have suggested that the use of ultra high performance fiber reinforce concrete (UHPFRC) significantly enhances the shear capacity and ductility of structural elements. Accoarding to the squat UHPFRC structural walls experimental results (Hung-Chi Chen,2015), there are two major failure modes: fiexural-shear failure and sliding shear failure. There are models that represent the flexural behaviour of walls to various degrees of accuracy. However, an efficient model is needed for accurate representation of the flexural and shear behaviour of these walls. In order to develop an analytical model for the simulation of the fiexural behavior, shear deformation and sliding shear behavior of the squat UHPFRC structural walls, the finite element software OpenSEES is used in this study. The developed model can simulate the fiexural behavior by using the nonlinear beam-column element. And consists of two nonlinear springs to simulate the shear behavior and sliding shear behavior. The shear envelope curve is based on the modified compression field theory (MCFT). The sliding shear envelope curve is based on the formulas and results of experimental observations. Finally, the comparison of simulated result and experimental result indicates that the proposed model can be used efficiently in simulating the hysteretic behaviour of the squat UHPFRC structural walls and to be capable of accurately predicting both shear and sliding components of inelastic deformation.
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校內:2021-08-04公開