Investigation of the steel moment resisting frame retrofitted with the linked column frame system by nonlinear static analysis and time history analysis

Articles in Press

Document Type : Research Article

Authors

1 Professor of Structural Engineering, Dean of Faculty of Civil Engineering, Semnan University

2 MSc

Abstract

For this purpose, three-, six-, and nine-story structures are considered based on the SAC building plan. four-, eight-, and sixteen-story bending frames were designed according to the 1st and 4th editions of the Regulations for the Design of Buildings against Earthquakes, and the frames designed with the 1st edition were designed by the frame and column system until the location of the target was changed. Subsequently, the reinforced and designed frames were analyzed using seven pairs of near- and far-field acceleration maps. According to the results of non-linear static analysis and dynamic analysis of the time history of the force difference percentage in the target displacement of the structure designed according to the 1st and 4th editions, the target is 27 to 50%, the percentage difference of the flow deformation of the structure designed according to the 1st edition to the retrofitted one is approximately 5–42%, and the percentage difference of the behavior coefficient of structures designed according to the 1st edition and retrofitted is from 4 to 40%. In a 4-story structure, this causes a 13.34% reduction in displacement and a 14.06% reduction in IDR. Similarly, in the case of 8-story structures, this reduction was measured as 20.92% for displacement and 20.81% for IDR. In the evaluation of the 16-story structure designed based on the1367 edition and the addition of the extension system, it was found that the addition of the extension system to the 16-story structure caused a decrease of approximately 51.43% in displacement and approximately26.89% in IDR.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 14 January 2025

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