Comparison of exploitation criteria and acceleration of diagrid steel structures with tube system based on wind dynamic analysis
mehdi hooshmand
1
(Islamic Azad university)
Hassan Haji Kazemi
2
(Department of Civil Engineering, Technical and Engineering Faculty, Ferdowsi University, Mashhad, Iran)
Seyed Alireza Zareei
3
(Department of Civil Engineering, Technical and Engineering Faculty, Isfahan Islamic Azad University (Khorasgan), Isfahan, Iran)
Keywords: tall building, Near field earthquake, Diagrid system, Tube system, comfort and acceleration criteria,
Abstract :
Considering the widespread use of diagrid systems in high-rise buildings, it seems necessary to investigate the behavior of this structural system against the wind and control comfort criteria based on acceleration. The purpose of this research is to compare the comfort criterion based on acceleration in the diagrid system with the tube system. For this purpose, the effect of various parameters such as the acceleration of floors and base shear under dynamic wind load has been evaluated. It is expected that the performance of the diagonal network will be evaluated with a more detailed understanding of the diagonal network in tall structures and the evaluation of the performance and comfort criteria based on the acceleration against the wind load using the dynamic analysis of time history using Cholsky, ergodic and AP methods. Investigations show that the acceleration of the diagrid system floors, based on the ASCE7 wind dynamic response prediction equations, has exceeded the permissible limit of the ASCE 7 regulation of milli-g20. This article is due to the overestimation of ASCE 7 equations compared to the results of wind time history analysis. So, in the 50-story structure, the maximum acceleration of the roof obtained from the ASCE equation is 71.83 times the results of the dynamic analysis of wind time history, and in the 70-story structure, it is 2 times, and in the 100-story structure, it is 1.87 times the results of the dynamic analysis of the wind time history.