ناصر ع, محمد ع. Studying the Effect of Changing the Stiffness Ratio of Beams and Columns of Space Frame Systems and its Vibration Period on Dynamic Response Values. Tuj-eng [Internet]. 2021Jul.7 [cited 2024Nov.24];43(3). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/10622