Effect of Fiber Reinforced Polymer Tubes Filled with Recycled Materials and Concrete on Structural Capacity of Pile Foundations
Effect of Fiber Reinforced Polymer Tubes Filled with Recycled Materials and Concrete on Structural Capacity of Pile Foundations
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DOI：
10.3390/app10051554
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发表时间：
2020-03-01
影响因子：
2.7
通讯作者：
Karakouzian, Moses
中科院分区：
文献类型：
--
作者：
Farhangi, Visar;Karakouzian, Moses
分析了玻璃纤维增强聚合物(GFRP)管填充再生混凝土材料发展复合桩的结构响应，作为桥梁基础中传统型钢桩的替代方案。全尺寸GFRP复合桩包括三个结构层，使用了一种纵向倾斜的纤维导向材料。近60%的纤维与绒毛的纵向成35度角，其余40%的纤维与水平轴成86度角。内层和外层之间的管段与管内的环向倾斜3度。填充的GFRP管的性能是半线性的，从而增加了桩的总延性和强度。调整材质的属性(如E轴、E环和泊松比)可以优化结果。对GFRP复合桩和预应力桩在轴压和弯矩荷载作用下的横向强度进行了研究。在已有参数研究的基础上，结合管壁厚度和GFRP纤维含量，可以得到不同偏心距范围内所需的桩身轴力和抗弯承载力。
This paper deals with analyzing the structural responses of glass-fiber-reinforced polymer (GFRP) tubes filled with recycled and concrete material for developing composite piles, as an alternative to traditional steel reinforced piles in bridge foundations. The full-scale GFRP composite piles included three structural layers, using a fiber-oriented material that was inclined longitudinally. Almost 60% of the fibers were orientated at 35 degrees from the longitudinal direction of the pile and the rest 40 percent were oriented at 86 degrees from the horizontal axis. The segment between the inner and outer layers was inclined 3 degrees from the hoop direction in the tube. The behavior of the filled GFRP tubes was semi-linear and resulted in increasing the total ductility and strength of the piles. Adjusting the material's properties, such as the E-Axial, E-Hoop, and Poisson ratios, optimized the results. The lateral strength of the GFRP composite pile and pre-stressed piles are investigated under both axial compression and bending moment loads. Based on the conducted parametric study, the required axial and bending capacities of piles in different ranges of eccentricities can be reached using the combination of tube wall thickness and GFRP fiber percentages.