Elastoplastic Quasi-Static and Impact Load Response of Steel Structure Sub-Assemblage with CFRP Strips


  •   Ali Al Aloosi

  •   Zia Razzaq


Presented in this paper is the outcome of an experimental investigation of the elastoplastic quasi-static and impact load response of a steel sub-assemblage constructed using a pair of hollow square section members with or without Carbon Fiber Reinforced Polymer (CFRP) strips. The sub-assemblage consists of a long structural member welded to a short member, thus representing a typical combination of a column and a beam on the face of a multi-story steel building frame. The column is subjected to a lateral quasi-static or impact load. Tests are conducted on four separate steel sub-assemblages. The first two tests are conducted with a gradually increasing flexural load applied at the midspan of the column up to the collapse condition without and with CFRP strips, respectively. Additional two tests are performed with a flexural impact load applied at midspan of the column also both without and with CFRP strips, respectively. The results of the study show that CFRP strips substantially increase the quasi-static collapse load of the sub-assemblage. However, when subjected to an impact load, the steel structure sub-assemblage with CFRP strips developed smaller strains in comparison with those without the CFRP strips. The post-impact time-dependent strains also became considerably smaller for the sub-assemblage with CFRP strips.

Keywords: Elastoplastic, Quasi-Static, Impact Load Response, Steel Structure Sub-Assemblage, Carbon Fiber Reinforced Polymer (CFRP) Strips


National Institute of Standards and Technology. NCSTAR 1 Federal Building and Fire Safety Investigation of the World Trade Center Disaster. Final Report on the Collapse of the World Trade Center Towers. Gaithersburg, Maryland, USA, September, 2005.

Galal K, El-Sawy T. Effect of retrofit strategies on mitigating progressive collapse of steel frame structures. Journal of Constructional Steel Research 2009;(66).

Wen HM, Reddy TY, Reid SR. Deformation and failure of clamped beams under low speed impact loading. International Journal of Impact Engineering, 1995; 16(3).

Liu J, Jones N. Experimental investigation of clamped beams struck transversely by a mass. International Journal of Impact Engineering, 1987; 6(4).

Majid K, Wu Z, Cunningham L. FE modelling of CFRP strengthened steel members under impact loads. Proceedings of the 24th UK Conference of the Association for Computational Mechanics in Engineering, Cardiff, 2016.


Download data is not yet available.


How to Cite
Aloosi, A.A. and Razzaq, Z. 2023. Elastoplastic Quasi-Static and Impact Load Response of Steel Structure Sub-Assemblage with CFRP Strips. European Journal of Engineering and Technology Research. 8, 2 (Mar. 2023), 13–15. DOI:https://doi.org/10.24018/ejeng.2023.8.2.2968.

Most read articles by the same author(s)