对SFRAC梁的裂纹阻力和轴承性能的计算方法
1School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450046, China.
Materials (Basel, Switzerland)
|July 14, 2023
概括
钢纤维回收混凝土 (SFRAC) 梁显示了更好的曲性能. 增加纤维含量提高了强度,而回收聚合物率对裂纹和最终时刻的影响最小.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 可持续建筑 可持续建筑
背景情况:
- 建筑垃圾管理是一个全球性的挑战.
- 回收聚合混凝土 (RAC) 提供了一个可持续的解决方案.
- 钢纤维增强减轻了RAC中的性能恶化.
研究的目的:
- 调查回收聚合物的替换率和钢纤维体积对钢纤维回收混凝土 (SFRAC) 梁的屈曲行为的影响.
- 建立一个预测模型,用于SFRAC梁的裂纹时刻.
- 验证现有标准的准确性,以确定SFRAC梁的最终承载能力.
主要方法:
- 设计和制造13个SFRAC梁,具有不同的水-水泥比率,回收聚合物的替换率和纤维体积比率.
- 系统的实验测试以确定裂变和最终时刻.
- 理论分析和模型开发用于裂变时刻预测.
- 实验结果与ACI 318和ACI 544标准进行比较.
主要成果:
- 随着水-水泥比率的降低和纤维体积比率的提高,SFRAC梁的裂纹和最终时刻会增加.
- 回收聚合物的替代率并没有显著影响裂纹和最终时刻.
- 建立了一个可靠的计算模型和裂变时刻公式.
- ACI 318和ACI 544标准准确地预测了最终承载能力.
结论:
- 钢纤维增强对于提高回收混凝土的弹性性能至关重要.
- SFRAC梁为结构应用提供了可行的解决方案,解决了性能退化问题.
- 该研究为设计可持续的SFRAC结构成员提供了有价值的数据和模型.
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