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| 摘要: |
| 采用ANSYS6．1有限元分析程序，计算了椭圆环约束开裂自动检测装置在干燥条件下的内外边界应力分布．采用改进后的椭圆环约束开裂试验，测定了混凝土砂浆初始开裂时间，并结合混凝土的干缩、抗折强度、极限拉伸应变等测试结果，综合评价了混凝土在非荷载及荷载作用下的抗裂性能．利用上述测试方法和评价体系，研究了粉煤灰对混凝土抗裂性能的影响． |
| 关键词: 混凝土开裂 抗裂性能 粉煤灰 干缩 砂浆 荷载作用 有限元分析程序 极限拉伸 抗折强度 ANSYS |
| DOI： |
| 分类号:TU528 TU375 |
| 基金项目: |
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| Effects and Evaluation on Cracking Behavior of Concrete Incorporating Fly Ash |
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PENG Wei-bing HE Zhen LIANG Wen-quan
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| Abstract: |
| The ellipse ring restrained test technique were used to test concrete shrinkage cracking. The results was analyzed and compared by ANSYS 6.1(finite element analysis tool). Then, the initial cracking time (ICT) of mortar specimen, concrete ultimate elongation, concrete shrinkage, concrete tensile strength were brought forward together to evaluate the cracking properties of concrete blending with fly ash. Concrete incorporating fly ash (four levels of cement replacement: 0, 20%, 35% and 50% by mass), were investigated. |
| Key words: fly ash,concrete,cracking,ellipse ring restrained test technique,finite element calculation,evaluation method |
