An Innovative Tubular Standing Support Incorporating PVC and FRP Composites: Laboratory Tests
An Innovative Tubular Standing Support Incorporating PVC and FRP Composites: Laboratory Tests
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结合 PVC 和 FRP 复合材料的创新管状站立支架：实验室测试
DOI：
10.1007/s10706-021-01895-9
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发表时间：
2021-06-17
影响因子：
1.7
通讯作者：
Zhao, Hongchao
中科院分区：
文献类型：
--
作者：
Zhang, Baisheng;Zhao, Hongchao
随着浅层资源的枯竭，开发创新型地下矿山支护结构的重要性越来越受到人们的关注。本文提出了一种混合管状站立支架，由聚氯乙烯（PVC）和纤维增强聚合物（FRP）制成的外部容器组成，而填充物是基于煤矸石的回填材料。具有高强度重量比的FRP护套附着在具有大断裂应变的PVC管的外表面上，以对填充回填材料提供限制。对不同FRP厚度的FRP-PVC管状站立支架（FPTSS）进行了一系列实验室测试。同时，还制备并测试了FRP管状站立支撑和带有鞋底限制材料的PVC管状站立支撑。测试结果表明，FPTSS 样本表现出典型的应变硬化行为，这归因于组合容器提供的有效约束。还表明，无论是抗压强度还是轴向变形能力的增强都与FRP厚度密切相关。从这项研究中获得的 FPTSS 的另一个相对优势是其在外部 FRP 护套破裂后的延性峰值后行为，表明在 FPTSS 中使用 PVC 管的重要性。除了其优异的抗压性能外，FPTSS 的成本效益和易于施工从设计方面也很有吸引力。
The importance of developing innovative support structure for underground mines has drawn much attention with the depletion of shallow resources. This paper presents a hybrid tubular standing support consisting of an exterior container made of the polyvinyl chloride (PVC) and fibre-reinforced polymer (FRP) while the infill is the coal rejects based backfill material. The FRP jacket featured with the high strength-to-weight ratio is attached on the exterior surface of the PVC tube with the large rupture strain to provide confinement to infilled backfill material. A series of laboratory tests were conducted on this FRP-PVC tubular standing support (FPTSS) with different FRP thickness. Meanwhile, the FRP tubular standing support and the PVC tubular standing support with the sole confining material were also prepared and tested. Tests results showed that the FPTSS specimen exhibited the typical strain hardening behaviour attributed to the effective confinement provided by the combined container. It is also indicated that the enhancement of either the compressive strength or the axial deformation ability is closely related to FRP thickness. The other comparative advantage of FPTSS obtained from this research is its ductile post-peak behaviour after the rupture of the exterior FRP jacket, indicating the importance of using PVC tube in FPTSS. Except for its superior compressive behaviour, the cost effectiveness and ease of construction of FPTSS are also attractive from the design aspect.