Al-Mudhafer, D. A. “Laboratory Evaluation of Steel Pipe Filled With Concrete Exposed to Heat Considering the Adhesion Between Concrete and Steel”. American Journal of Engineering , Mechanics and Architecture (2993-2637), vol. 2, no. 12, Dec. 2024, pp. 22-29, http://grnjournal.us/index.php/AJEMA/article/view/6247.