关于SMAF-ECC复合材料和钢条之间结合性能的实验研究
Zhao Yang1,2, Shuai Li1, Feng Gao1
1School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China.
Materials (Basel, Switzerland)
|July 29, 2023
概括
用形状记忆合金 (SMA) 纤维增强的工程水泥复合材料 (ECC) 增强了混凝土组件. 这项研究证实,SMA纤维增强可提高SMA纤维增强ECC (SMAF-ECC) 中的钢条结合强度,这对于抗震能力至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
背景情况:
- 工程水泥复合材料 (ECC) 提供增强的柔性.
- 形状记忆合金 (SMA) 纤维提供独特的回收和能量消散特性.
- 将ECC与SMA纤维相结合,可以创建SMA纤维增强ECC (SMAF-ECC),以提高结构性能.
研究的目的:
- 为了研究钢条和SMAF-ECC之间的结合行为.
- 为了确定钢条直径,结合长度和SMAF体积分数对结合强度的影响.
- 在SMAF-ECC中为钢条开发一个债券滑动构成模型.
主要方法:
- 在嵌入SMAF-ECC标本的钢条上进行了直接拉力测试.
- 分析了故障模式和债券强度.
- 影响因素包括钢条直径,结合长度和SMAF体积分数系统地变化.
- 提出了一种债券滑坡构成模型,并根据实验数据进行了验证.
主要成果:
- 钢条拉出是主要的故障模式.
- 加入SMAF显著提高了钢条与SMAF-ECC矩阵之间的结合强度.
- 增加钢条直径和结合长度降低了结合强度.
- 较高的SMAF体积分数导致债券强度大幅增加,在0.5%的SMAF中观察到最佳结果.
- 提出的债券滑动模型准确预测了实验结果 (R2=0.99).
结论:
- SMAF-ECC显示了提高钢筋混凝土组件抗震性能的巨大潜力.
- 在SMAF-ECC中,钢条的结合特性受到材料组成和几何参数的强烈影响.
- 开发的债券滑坡模型为设计利用SMAF-ECC的结构提供了有价值的工具.
- 这项研究为SMAF-ECC在土木工程中的实际应用奠定了基础.
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