Seismic response of post-tension shear walls – Outrigger structure

This research was conducted by combining two structural systems: post-tensioned core walls and an outrigger in a 40-story building. A Vierendeel outrigger system was applied to one and two stories, and a comparison between models was performed to determine the best outrigger locations. In addition, the effect of post-tensioned core walls at only 25 % of the building height was investigated. Subsequently, the best positions of the Vierendeel outrigger system were applied with bonded post-tension core walls at a building height of only 25 %. The results showed an improvement in lateral stiffness using the outrigger, and roof displacement was enhanced by approximately 42 %. The post-tension core walls enhanced roof displacement by approximately 14 %. Both systems worked together to reduce roof displacement by approximately 50 %.