| 混凝土结构裂缝扩展和裂缝宽度的数值预测 |
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| 引用本文： | Yvonne Theiner,Günter Hofstetter. 混凝土结构裂缝扩展和裂缝宽度的数值预测[J]. 钢结构, 2009, 0(8) |
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| 作者姓名： | Yvonne Theiner Günter Hofstetter |
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| 摘 要： | 对混凝土结构裂缝扩展和裂缝宽度进行数值预测。裂缝早期,以分布式小裂缝为主。通过具有旋转裂缝方向的弥散裂缝模型对其进行描述。随后的较大裂缝通过在各自有限元的位移区嵌入一个隔断进行描述。具有这种隔断的裂缝模型可以对初始裂缝方向的错误预报进行修正。对裂缝法向扩张,以及表面裂缝横向剪力传递形成的切向位移进行解释。通过一系列试验,对法向和剪切荷载作用下的混凝土试件进行模型验证,并将其应用于工程实践解决相关的实际问题。第一个问题涉及嵌入混凝土中钢锚杆的承载性能,第二个问题涉及经过不同类型混凝土外覆加固的预损伤板的结构性能。
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| 关 键 词： | 混凝土 裂缝宽度 裂缝路径 大隔断 |
Numerical Prediction of Crack Propagation and Crack Widths in Concrete Structures |
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| Abstract: | The paper deals with the numerical prediction of crack propagation and crack widths in concrete structures.The early stages of cracking,characterized by distributed micro-cracking,are described by a smeared crack model with rotating crack directions,whereas the subsequent formation of a macro-crack is described by embedding a discon-tinuity in the displacement field of the respective finite ele-ments.This so-called crack model with delayed embedded discontinuities allows correcting initial mispredictions of... |
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| Keywords: | Concrete Crack width Crack path Strong discontinuity Aggregate interlock |
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