Influence of Bracing on Buckling Strength of Pultruded Glass Fiber Reinforced Polymer Frames


  •   Mojtaba B. Sirjani

  •   Zia Razzaq


A numerical study of the influence of structural bracing on the buckling strength of pultruded Glass Fiber Reinforced Polymer (GFRP) frames is presented. Although the influence of bracing on frames made from other materials such as steel have been studied in the past, this paper investigates the performance of pultruded GFRP portal frames with pinned or fixed column bases. Each frame is constructed with pultruded GFRP I-section members. The influence of I-section column major and minor axis orientation is also investigated. The results demonstrate the practical significance of bracing pultruded GFRP frames. The results show that the buckling loads for braced frames are seven to nine times greater than those for unbraced frames when the column bases are pinned. The corresponding gain in the buckling load capacity due to the addition of bracing is more than three times if the column bases are fixed.

Keywords: Bracing, Buckling, Fiber Reinforced, Frams


F. Minghini, N. Tullini, F. Laudiero “Buckling anaylsis of FRP Pultruded Frames using Locking free Finite Elements Approach,” Elsevier, Engineering Structures, Vol. 46, Issue 3. March 2008, pp. 223-241.

F. Minghini, N. Tullini, F. Laudiero, “Elastic Buckling Analysis of Pultruded FRP Portal Frames having semi-rigid connections,” Elsevier, Engineering Structures, Vol. 31, Issue 2. February 2009, pp. 292-299.

S. P. Timoshenko, J. Gere, Theory of Elastic Stability, McGraw-Hill Publishing Company, Second Edition, 1988.

T. V. Galambos, Structural Members and Frames, Prentice-Hall Inc., Englewood Cliffs, New Jersey, 1968.

American Society of Civil Engineers. Pre-Standard for Load and Resistance Factor Design (LRFD) of Pultruded Fiber Reinforced Polymer (FRP) Structures, November 2010.

Steel Construction (AISC) Manual, American Institute of Steel Construction

X. Yu, T. Ji and T. Zheng, “A Review of Influence of Various Types of Structural Bracing to the Structural Performance of Buildings,” Engineering

J. T. Mottram, “Stability Analysis of Plane Frames of Fibre Reinforced Polymer having Semi-rigid Joints and Shear-flexible Members, Proceedings of the 3rd International Conference on Advanced Composites in Construction, York Publishing Services Ltd., York, 2007, pp. 61-68.

J. T. Mottram, “Stability Analysis for Pitched Portal Frames of Fibre Reinforced Polymer,” Fourth International Conference on FRP Composites in Civil Engineering, Zurich, Switzerland, 22-24 July,

Sirjani, M. B., and Razzaq, Z., “Stability of FRP Beams under Three-point Loading and LRFD Approach,” Journal of Reinforced Plastics and Composites, Vol. 24, No. 18, 2005.

Razzaq, Z., Sirjani, M.B., and Prabhakaran, R., “LRFD Approach for FRP Channel Section Columns,” Journal of Reinforced Plastics and Composites, Vol. 28, No. 12, 2009, pp. 1409-1415.


Download data is not yet available.


How to Cite
Sirjani, M.B. and Razzaq, Z. 2020. Influence of Bracing on Buckling Strength of Pultruded Glass Fiber Reinforced Polymer Frames. European Journal of Engineering Research and Science. 5, 10 (Oct. 2020), 1237-1239. DOI: