Andrisman Satria, Chaira, Yunita Arafah. STRUCTURAL ANALYSIS OF CONCRETE BUILDING SPACE EXPANSION WITH STEEL PORTAL REINFORCEMENT STRUCTURAL ANALYSIS OF SPACE EXPANSION OF CONCRETE BUILDING WITH RETROFITTING STEEL PORTAL. IJSET [Internet]. 2024 Aug. 14 [cited 2025 Sep. 11];3(9):1475-80. Available from: https://ijset.org/index.php/ijset/article/view/534