| 延性纤维增强水泥基复合材料的抗弯性能 |
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| 引用本文： | 张君,公成旭,居贤春,郭自力.延性纤维增强水泥基复合材料的抗弯性能[J].工程力学,2010(3). |
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| 作者姓名： | 张君 公成旭 居贤春 郭自力 |
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| 作者单位： | 清华大学土木工程系;结构工程与振动教育部重点实验室; |
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| 基金项目： | 国家自然科学基金项目(50878119) |
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| 摘 要： | 该文通过三点弯曲试验,研究了不同水胶比的高延性纤维增强水泥基复合材料(PVA-ECC)的抗弯性能。实验结果表明,水胶比对PVA-ECC的抗弯性能影响显著。随着水胶比的降低,抗弯强度增大,但梁的延性下降。水胶比由0.35降为0.25时,抗弯强度和延性均有突变。水胶比大于0.35时,水胶比对抗弯强度和延性的影响没有水胶比小于0.35时影响显著。与普通混凝土材料相比,梁的抗弯强度和延性均有明显提高。普通混凝土梁在达到峰值荷载后,承载力迅速下降,而PVA-ECC梁在达到峰值荷载后,有一段平缓的延性段,承载力下降缓慢,延性增加明显。
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| 关 键 词： | 纤维增强水泥基复合材料 抗弯性能 预切口梁 延性 水胶比 |
BENDING PERFORMANCE OF DUCTILE FIBER REINFORCED CEMENTITIOUS COMPOSITE |
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| ZHANG Jun,GONG Cheng-xu,JU Xian-chun,GUO Zi-li.BENDING PERFORMANCE OF DUCTILE FIBER REINFORCED CEMENTITIOUS COMPOSITE[J].Engineering Mechanics,2010(3). |
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| Authors: | ZHANG Jun GONG Cheng-xu JU Xian-chun GUO Zi-li |
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| Affiliation: | Key Laboratory of Structural Engineering and Vibration of China Education Ministry;Department of Civil Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The behavior of PVA fiber reinforced engineered cementitious composite(PVA-ECC) under bending load is investigated through experiments.The test results show that the water to cementitious material ratio(W/C) has a significant influence on the bending performance of PVA-ECC.The bending strength increases with the reduction of W/C while the ductility of the beam decreases.As the W/C varies from 0.35 to 0.25,both bending strength and ductility have a sudden change.When W/C is higher than 0.35,the influence of ... |
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| Keywords: | Fiber reinforced cementitious composite bending performance pre-notched beam ductility water to cementitious ratio |
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