纤维增强复合材料（FRP）约束煤矸石骨料混凝土试验研究与分析模型

李昕雨; 王泽源; 刘力豪; 杨家琦; 冯鹏

doi:10.3724/j.gyjzG25073102

纤维增强复合材料（FRP）约束煤矸石骨料混凝土试验研究与分析模型

doi: 10.3724/j.gyjzG25073102

1. 中国矿业大学(北京)力学与土木工程学院, 北京 100083;
2. 国家建筑绿色低碳技术创新中心, 北京 100088;
3. 中国煤炭科工集团, 北京 100013;
4. 清华大学土木工程系, 北京 100084

基金项目:

国家自然科学基金项目（52378207，52208251）。

详细信息

作者简介:
李昕雨，博士研究生，主要从事约束混凝土研究。Email:lixinyu7218@163.com

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出版历程
- 收稿日期: 2025-07-31
- 刊出日期: 2025-10-31

Experimental Study and Analysis-Oriented Model of FRP-Confined Coal Gangue Aggregate Concrete

1. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
2. National Center of Technology Innovation for Green and Low-Carbon Building, Beijing 100088, China;
3. China Coal Technology Engineering Group, Beijing 100013, China;
4. Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 煤矸石是矿区生产中持续产生的固态伴生物，可以替换混凝土中的天然砂石制备成煤矸石混凝土，可助力解决煤矸石堆积造成的污染和天然骨料稀缺等问题。为了弥补煤矸石替换人工骨料带来的混凝土力学性能下降的问题，可以使用纤维增强复合材料（FRP）约束混凝土以提高煤矸石骨料混凝土的轴压强度。考虑了煤矸石体积替代率（0%、50%）、FRP布种类（玻璃纤维布、碳纤维布）和缠绕层数（1~6层）3种变量，设计了18组试件进行轴压试验，对比分析不同形式的FRP约束煤矸石混凝土的应力-应变关系。结果表明，FRP约束作用下的煤矸石骨料混凝土与普通混凝土具有相似的特性，在约束充足的情况下会呈现荷载二段式上升的特性，但当约束刚度较大时FRP的约束对于轴压强度的提升效果逐渐减弱。最后，基于试验结果，运用三维图形表达法建立了FRP约束煤矸石骨料混凝土的分析模型。
- 煤矸石骨料混凝土 /
- FRP约束 /
- 试验研究 /
- 分析模型
Abstract: Coal gangue， a solid byproduct continuously generated during mining operations， can be utilized to replace natural aggregates in concrete， forming coal gangue aggregate concrete （CGAC）. This application addresses the environmental pollution caused by gangue stockpiling and mitigates the scarcity of natural aggregates. To compensate for the reduction in the mechanical properties of concrete resulting from replacing conventional aggregates with coal gangue， fiber-reinforced polymer （FRP） confinement can be employed to enhance the axial compressive strength of CGAC. In this study， the effects of three parameters were investigated： the coal gangue replacement ratio by volume （0% and 50%）， the FRP fabric type （glass fiber and carbon fiber）， and the number of FRP confinement layers （1 to 6 layers）. A total of eighteen specimens were tested under axial compression to compare the stress-strain relationships of CGAC confined with different types of FRP. Experimental results indicated that FRP-confined CGAC exhibited characteristics similar to those of FRP-confined conventional concrete. Under sufficient confinement， the load-displacement response demonstrated a distinct two-stage ascending behavior. However， the enhancement effect on the axial compressive strength gradually diminished as the confinement stiffness increased significantly. Finally， based on the experimental findings， an analytical model for FRP-confined CGAC was developed using a three-dimensional graphical representation approach.
- coal gangue aggregate concrete /
- FRP confinement /
- experimental study /
- analysis-oriented model

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参考文献(20)

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