Investigating the Performance of High-rise Steel Structures with Tube Systems under the Effect of Progressive Failure
نویسندگان
1 Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
2 Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
3 Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
4 Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
doi
10.5829/ije.2026.39.01a.08چکیده
The objective of this study is to analyze the behavior of high-rise buildings with tubular systems under critical column removal (corner and mid-span) using nonlinear dynamic analysis. The performance of these buildings was assessed against lateral loads such as earthquakes and winds, particularly in column removal scenarios. Nonlinear dynamic analysis was performed on 10, 20, and 30-story buildings with different tubular systems, including those with steel shear walls, shear cores, and braces. The results showed that in 10-story buildings, the system with steel shear walls experienced 65 mm displacement in the corner column removal scenario and 75 mm in the mid-span column removal scenario. In 30-story buildings, the shear core system had 159 mm and 161 mm displacements in the corner and mid-span column removal scenarios, respectively. The simple tubular system had the highest displacements, particularly in the mid-span removal scenario (100 mm in 30-story buildings). In this scenario, the number of plastic hinges decreased from 70 to 65 in the system with steel shear walls and from 98 to 83 in the unreinforced system. The "Braced Tube" system was the most resilient in 20-story buildings, reducing plastic hinges from 152 to 143, with the greatest reduction at the Immediate Occupancy (IO) performance level observed in the "Classified Tube" and "Braced Tube" systems.
