研究钢纤维增强混凝土的轴向压缩行为,用高强度的矩形螺旋螺纹结
Huajing Zhao1, Weitong Liu1, Penghui Yang2
1School of Science, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Materials (Basel, Switzerland)
|February 13, 2025
概括
钢纤维增强混凝土 (SFRC) 柱子被螺旋杆限制,显示出更好的强度和柔性. 冲动性质和混凝土强度显著影响性能,新模型准确预测行为.
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
- 结构工程 结构工程
背景情况:
- 钢纤维增强混凝土 (SFRC) 越来越多地用于结构应用.
- 像杆这样的限制元素对于提高混凝土柱的性能至关重要.
- 了解SFRC特性和封闭之间的相互作用对于结构设计至关重要.
研究的目的:
- 为了研究杆间距,强度,混凝土强度和面积比对轴向压缩下的SFRC柱子的影响.
- 分析钢纤维对混凝土裂变和整个柱子行为的影响.
- 开发和验证由高强度矩形螺旋杆 (HRSS) 限制的SFRC柱子的组成模型.
主要方法:
- 在16个具有不同参数的SFRC柱上进行了单调的轴向压缩测试.
- 分析了峰值负载,柔性和故障模式.
- 提出了计算杆应力的一种方法,并开发了一种包含"合束系数"的构成模型.
主要成果:
- 钢纤维有效地通过桥梁减少了混凝土的分裂.
- 较小的杆间距和更高的杆强度显著提高了承载能力和柔性.
- 较高的混凝土强度与封闭效应正相关,但回报率下降.
- 提出的构成模型与实验数据有很好的一致性.
结论:
- 优化杆设计和考虑混凝土强度是提高SFRC柱子性能的关键.
- 开发的构成模型为预测受限SFRC列的行为提供了可靠的工具.
- 钢纤维在提高混凝土柱的耐用性和机械性能方面发挥着至关重要的作用.
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