Optimum Design of Stiffeners in Trapezoidal Load-Bearing Diaphragms in Steel-Box Girders Having a Central Support. مجلة العلوم الهندسية [Internet]. 2025 May 25 [cited 2026 Jun. 18];41(2). Available from: https://journal.damascusuniversity.edu.sy/index.php/engj/article/view/7545