| 摘要: |
| 基于7组聚乙烯醇纤维增强水泥基复合材料（PVA ECC）试件的轴心受压徐变试验,研究了不同纤维掺量和加荷龄期条件下PVA ECC的徐变性能.结果表明：在试验掺量范围内,纤维掺量越大,PVA ECC的徐变能力越大;PVA ECC的徐变随加荷龄期的延长而降低,晚龄期加载试件的徐变小于早龄期加载试件.结合已有混凝土徐变计算模型和本文试验结果,提出了估算PVA ECC徐变的2种模型,其计算值与试验值吻合较好. |
| 关键词: 聚乙烯醇纤维水泥基复合材料 徐变 纤维掺量 加荷龄期 估算模型 |
| DOI：103969/j.issn.1007 9629202004013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51768051);内蒙古自治区科技创新引导项目（KCBJ2018016）;内蒙古自治区自然科学基金资助项目（2018LH05040） |
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| Experimental Study on Creep Behaviors of PVA ECC |
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WANG Yuqing1, LIU Xiao1, LIU Shuguang2, SUN Liang3
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1.School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2.School of Mining and Technology, Inner Mongolia University of Technology, Hohhot 010051, China;3.Xingan Power Supply Company, Eastern Inner Mongolia Electric Power Co., Ltd., State Grid, Ulanhot 137400, China
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| Abstract: |
| Based on the creep tests of seven groups of engineered cementitious composite with polyvinyl alcohol fiber(PVA ECC) under axial compression, the creep behaviors of PVA ECC with different fiber content and loading age were studied. The results show that the higher of the fiber volume rate is, the greater of the creep value is. The creep value of PVA ECC decreases with the increase of loading age, and the creep value of specimens loaded in the late age is smaller than that loaded in the early age. Based on the existing concrete creep estimation models and the test results, two models for creep estimation of PVA ECC are proposed. Compared with the test data, the values calculated by the two model formulas are in good agreement with the test values. |
| Key words: engineered cementitious composite with polyvinyl alcohol fiber(PVA ECC) creep fiber content loading age estimation model |
