对高强度混凝土深梁的剪切性能进行实验研究,用板进行纵向增强
Shu-Shan Li1,2, Tian-Cheng Jin1, Li-Ang Zheng1
1School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.
Materials (Basel, Switzerland)
|September 9, 2023
概括
这项研究研究了高强度混凝土深梁,发现软化杆和领带模型准确地预测了剪切能力. 影响承载能力的关键因素包括剪距比率和纵向增强比率.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
背景情况:
- 深层梁表现出复杂的应力机制,与浅层梁显著不同.
- 传统的浅光分析对于深光设计和计算是不够的.
- 带有板的高强度混凝土深梁带来了独特的结构挑战.
研究的目的:
- 分析深层梁的应力机制,使用坚固结合模型.
- 为了验证深层梁的支架与绑定模型的适用性和准确性.
- 为了研究各种强化比率和剪切跨度比率对深梁行为的影响.
主要方法:
- 在双点集中负荷下对9个高强度混凝土深梁样本进行实验测试.
- 剪切跨度比率的系统变化,纵向增强比率,横向增强比率和杆增强比率.
- 实验结果与国家标准和各种坚固结合模型 (坦坦,坦,SSTM,SSTM) 的预测进行比较.
主要成果:
- 深光束样本主要通过对角压缩失败.
- 裂纹负载在最终负载的15-20% (正常截面) 和30-40% (倾斜截面) 时被观察到.
- 增加的剪距比率降低了承载能力,而增加的纵向增强比率提高了承载能力.
- 软化后的支架与领带模型在预测剪切能力方面表现出卓越的准确性.
结论:
- 支架和绑定模型,特别是软化版本,是分析深梁应力机制的合适工具.
- 剪切跨度比和纵向增强比是影响这些梁承载能力的关键参数.
- 软化后的杆和带模型提供了更准确的切割能力预测高强度混凝土深梁与板.
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