姓名 |
黃秀雅(Hsiu-Ya
Huang) |
電子郵件信箱 |
E-mail 資料不公開 |
畢業系所 |
營建工程系碩士班(Department and Graduate Institute of Constrction
Engineering) |
畢業學位 |
碩士(Master) |
畢業時期 |
96學年第2學期 |
論文名稱(中) |
利用擾動狀態概念評估損傷構件之承載行為 |
論文名稱(英) |
Evaluating the Bearing Behavior of Damage Structural Element
with Disturbed State Concept |
檔案 |
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|
論文使用權限 |
校內外都二年後公開 |
論文語文/頁數 |
中文/82 |
摘要(中) |
本研究以Desai提出之「擾動狀態概念模式」(Disturbed State Concept,
DSC)為主軸,配合以有限差分為基礎之數值分析軟體FLAC程式來進行構件損傷後之承載分析,探討不同損傷程度與其承載力的關係,建立一套損傷構件的承載力評估方法。因DSC模式並未內建於FLAC軟體供使用者使用,因此需以Fish語言將此模式撰寫成FLAC可執行之副程式,副程式完成以後便進行渥太華砂之三軸壓縮試驗與混凝土單軸壓縮試驗以驗證Fish語言撰寫的DSC副程式及FLAC分析方法的正確性,然後利用前人結合超音波量測與鋼筋拉拔試驗的試驗結果,配合基因演算法得到混凝土構件之DSC材料參數,再由此DSC材料參數進行損傷構件的承載行為之研究。
假設混凝土構件在加載前已有不同的損傷程度,其損傷程度可用超音波波速表示,再以FLAC模擬其在軸向加載後的應力應變曲線,藉以得到對應的承載力,並整理出三種徑高比分別為1:2、1:5與1:10之混凝土試體抗壓強度與損傷函數D的迴歸公式,建立一套運用超音波波速配合本研究迴歸公式,即可預測受損後混凝土構件之抗壓強度的評估方法。 |
摘要(英) |
This
research used FLAC, a numerical analysis software based on the
finite difference method, with the Disturbed State Concept (DSC)
to analyze the bearing capacity of damaged structural element.
The relationship between the damaged degree and bearing capacity
is discussed. A method for evaluating the bearing capacity of
damaged structural element is established. Because the DSC model
has not been built in FLAC, it is necessary to use the Fish
language to compile this model into a subroutine that can be
implemented by FLAC. After completing the subroutine, this study
then verified its rationality by simulating the triaxial
compression tests of Ottawa sand and uniaxial compression tests
of concrete for comparison reason. Then the acoustic wave test
with steel bar pull-out was simulated in this study, the
acoustic wave speed , shear stress on interface, and slip were
compared with the experiment results by Tang. And then the DSC
material parameters of concrete element will be calculated by
genetic algorithm. Finally, the bearing capacity of damaged
concrete element was analyzed by using the DSC material
parameters.
The damaged degree of concrete element can be expressed as
acoustic wave speed. The relationship curve of stress-strain of
damaged concrete element can be obtained by using FLAC to
simulate the uniaxial compression test of a damaged concrete
element in a damaged degree. The bearing capacity can be decided
from the relationship curve in a damaged degree that can be
expressed as acoustic wave speed. There fore , regression
formula for bearing capacity and acoustic wave speed of damaged
concrete elements in 3 diameter-high ratio will be found in this
study. |
關鍵字(中) |
損傷
擾動狀態概念
超音波
數值模擬
|
關鍵字(英) |
Numerical Simulation
Disturbed State Concept
acoustic wave
Damage
|
口試委員 |
鄭玉旭 - 召集委員
江支弘 - 委員
冀樹勇 - 委員
蔡佩勳 - 指導教授
|
口試日期 |
2008-07-25 |
繳交日期 |
2008-08-28 |