Evaluation of the seismic performance of existing high-rise buildings with a special reinforced concrete core-frame system according to TBI2017 seismic criteria under long-period earthquake records (case study of a 35-story tower)

مهندسی عمران فردوسی

Article 1, Volume 38, Issue 3 - Serial Number 51, August 2025, Pages 1-22   

Document Type: Original Article

DOI: 10.22067/jfcei.2025.90819.1330

Authors

Nima Armion Nejad; Hossein Pahlavan^* ; Mohammad Shamekhi Amiri

Structural and Earthquake Engineering,Faculty of Civil Engineering,Shahrood University of Technology,Shahrood,Iran

Abstract

As the height of the building increases, the structural rotation increases and with the rotation time increases, it can easily cause damage and cause serious damage to the rotating structures. For the important reason of the matter, it is necessary to make a careful assessment before carrying out such phenomena.An existing reinforced concrete high-rise building example with a number of floors of 35 floors in a soil area with high relative risk and type III with a special reinforced concrete frame-core system designed in the 4th edition and ACI318-14 is completed in the 3D modeling software ETABS V21. TBI 2017 guidelines Nonlinear dynamic analysis is performed and the performance acceptance methods which are in some cases newer indicators compared to ASCE41-17 are implemented. This guideline, which is specially made for tall buildings, considers a new and strict design for the design of these structures. Criteria that are not present in the prescriptive regulations such as the Iranian Standard 2800. These include permanent drift control of the structure and earthquake control at the MCE level.

The results show that in the studied structure, machine drift and permanent drift have increased by 52% and 33%, respectively, in earthquakes with a long period compared to earthquakes with a short period. Also, the compressive strain of the concrete of the walls and the tensile strain of the reinforcement of the shear wall have increased by 83% and 45%, respectively, under the same conditions.

Keywords

high-rise building; long period earthquakes; special reinforced concrete frame-core system; seismic performance

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