Recently, precast concrete wall structural systems have gained significant attention in the construction industry. The structural system reveals a strong preference among engineers when building medium-rise residential buildings. One of the prevalent vertical connection types of precast concrete walls is known as a loop bar joint. This type of joint provides simplicity in the construction and installation processes. While most research typically emphasizes the study of developing joint configurations of the precast wall systems to enhance their seismic resistance, the understanding of the beha Authors: Piyapong,,Wongmatar;Warakorn,,Tantrapongsaton;Kittikun,,Jitpairod;Amorn,,Pimanmas;Preeda,,Chaimahawan;Chayanon,,Hansapinyo. Presented at TSER2023.