Behavior of Centrifuged GFRP Poles Under Lateral Deflection

Q3 Engineering

Open Civil Engineering Journal Pub Date : 2023-06-01 DOI:10.28991/cej-2023-09-06-07

Y. Awad, Ahmed M. El-Fiky, H. Elhegazy, M. G. Hasan, Ibrahim A. Yousef, A. Ebid, M. Khalaf

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引用次数: 0

Abstract

Centrifugal-manufactured GFRP pipes are widely used today as lighting and low-power transmission poles due to their lightweight, high electrical insulation, low cost, and corrosion resistance. Despite these advantages, GFRP poles suffer high deflection problems due to their low elastic and shear moduli values. In order to overcome this disadvantage, three techniques were suggested to control the lateral deflection of the GFRP poles: an extended internal steel stub, external steel angles, and internal steel bracing bars. The main objective of this study is to determine the optimum strengthening technique to improve the serviceability of GFRP poles in terms of lateral deflection according to ASTM D4923. An experimental research program containing five full-scale GFRP poles was carried out to determine the optimum strengthening technique and the effect of connectors opening near the base and compare it to previous research. The results indicated that flexural stiffness was increased by 44%, 66%, and 38% for the extended stub, steel angles, and bracing bars, respectively. Besides that, the reduction in flexural stiffness due to connector opening was about 8%. The measured deflections showed good matching with simplified mathematical calculations, and the division was about ±10%. The external steel angle technique showed the best efficiency in Stiffness behavior. Doi: 10.28991/CEJ-2023-09-06-07 Full Text: PDF

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离心GFRP杆在侧向挠曲作用下的性能

离心制造的玻璃钢管由于其重量轻、电绝缘高、成本低、耐腐蚀等优点，目前被广泛用于照明和低功率输电线杆。尽管有这些优点，GFRP杆遭受高挠度问题，由于其低弹性和剪切模量值。为了克服这一缺点，建议采用三种技术来控制GFRP杆的侧向挠度:延长内部钢短段，外部钢角和内部钢支撑杆。本研究的主要目的是根据ASTM D4923确定最佳强化技术，以提高GFRP杆在侧向挠度方面的可用性。采用5根全尺寸GFRP杆进行了试验研究，确定了最优加固技术和基础附近连接件开口的效果，并与之前的研究进行了比较。结果表明，延长桩、钢角和支撑杆的抗弯刚度分别提高了44%、66%和38%。此外，由于连接器打开，弯曲刚度降低了约8%。实测挠度与简化的数学计算结果吻合较好，误差约为±10%。外钢角技术的刚度性能最好。Doi: 10.28991/CEJ-2023-09-06-07全文:PDF

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来源期刊

Open Civil Engineering Journal Engineering-Civil and Structural Engineering

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： The Open Civil Engineering Journal is an Open Access online journal which publishes research, reviews/mini-reviews, letter articles and guest edited single topic issues in all areas of civil engineering. The Open Civil Engineering Journal, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, offshore geotechnics, water resources, hydraulics, horology, coastal engineering, river engineering, ocean modeling, fluid-solid-structure interactions, offshore engineering, marine structures, constructional management and other civil engineering relevant areas.