Numerical Modelling Of Glass Fibre Reinforced Polymer (Gfrp) Tube Subjected To Torsion

Agusril Syamsir(1*), Nurul ‘Amira Binti Mohd Hafiz(2)

(1) Institute of Energy Infrastructure (IEI), Universiti Tenaga Nasional, Malaysia.
(2) Civil Engineering Department, College of Engineering, Universiti Tenaga Nasional, Malaysia.
(*) Corresponding Author


Copyright (c) 2021 Agusril Syamsir, Nurul Mira Binti Mohd Hafiz


Glass Fibre Reinforced Polymer (GFRP) tubes have been used widely as cross arm of electric transmission towers to replaced old wooden cross arms. Cross arm is a part of transmission tower which is required to support conductors or electrical cables. Due to nature of assembly of these GFRP tubes, it will induce torsional force to the individual GFRP tubes of cross arm. The importance of torsional effect to the cross arm has encouraged researcher to study on torsional strength of the single tube itself in order to support a complete set cross arm. In this paper, the performance of glass fiber-reinforced polymer (GFRP) tubes under statically torsional loads was studied numerically. The specimens’ ultimate twisting angle and strain were studied through tests for validation of the numerical model. Explicit solver of ANSYS was chosen and simulation results matched experiment results well with 4 % different. There are six model were simulated and analyzed in this research. It is concluded that model 4 shown the highest ultimate strains as well as twisting angle while model 3 has the lowest ultimate strains and twisting angle. The presence of fiber orientation of 90o in model 4 has contributed to the torsional capacity of the tubes.


numerical model; torsional force; GFRP

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Alabdulhady, M. Y., & Sneed, L. H. (2019). Torsional strengthening of reinforced concrete beams with externally bonded composites: A state of the art review. Construction and Building Materials, 205, 148–163.

Beddu, S., Syamsir, A., Ishak, Z. A. M., Yusof, Z. M., Hudi, N. S., & Nabihah, S. (2018). Creep behavior of glass fibre reinforced polymer structures in crossarms transmission line towers. AIP Conference Proceedings, 2031(1), 20039.

Chalioris, C. E. (2008). Torsional strengthening of rectangular and flanged beams using carbon fibre-reinforced-polymers–Experimental study. Construction and Building Materials, 22(1), 21–29.

Lee, H., Jang, H., & Chung, W. (2019). Effect of Recycled Concrete on the Flexural Behavior of Concrete-Filled FRP Tubes. International Journal of Concrete Structures and Materials, 13(1), 1–10.

Mohamad, D., Beddu, S., Kamal, N. L., Zahari, N. M., & Zainoodin, M. M. (2019). An examination on torsional loading and environmental effect on glass fibre reinforced polymer cross arm in transmission line tower.

Mohamad, D., Syamsir, A., Beddu, S., Abas, A., Ng, F. C., Razali, M. F., & Seman, S. (2019). Numerical study of composite fiberglass cross arms under statics loading and improvement with sleeve installation. IOP Conference Series: Materials Science and Engineering, 530(1), 12027.

Muttashar, M., Manalo, A., Karunasena, W., & Lokuge, W. (2017). Flexural behaviour of multi-celled GFRP composite beams with concrete infill: Experiment and theoretical analysis. Composite Structures, 159, 21–33.

Nadhirah, A., Beddu, S., Mohamad, D., Zainoodin, M., Nabihah, S., Zahari, N. M., Itam, Z., Mansor, M. H., Kamal, N. L. M., & Alam, M. A. (2017). Properties of fiberglass crossarm in transmission tower-a review. International Journal of Applied Engineering Research, 12(24), 15228–15233.

Syamsir, A., Ishak, Z. A. M., Yusof, Z. M., Salwi, N., & Nadhirah, A. (2018). Durability control of UV radiation in glass fiber reinforced polymer (GFRP)-A review. AIP Conference Proceedings, 2031(1), 20033.

Syamsir, A., Mohamad, D., Beddu, S., Itam, Z., & Sadon, S. N. (2019). An examination on durability and degradation of glass fiber reinforced polymer structures. Test Eng. Manage, 81, 3379–3388.

Syamsir, A., Nor, N. M., & Zhao, Z. J. (2012). Failure analysis of Carbon Fiber Reinforced Polymer (CFRP) bridge using composite material failure theories. Advanced Materials Research, 488, 525–529.

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