Issue 74

E. Sharaf et alii, Fracture and Structural Integrity, 74 (2025) 262-293; DOI: 10.3221/IGF-ESIS.74.17

An innovative analytical approach for predicting the fundamental time period of moment-resisting frames

Eman Sharaf Department of Civil Engineering, Misr Higher Institute for Engineering and Technology, Mansoura, Egypt Structural Engineering Department, Faculty of Engineering, Zagazig University, Sharkia Governorate, Zagazig 44519, Egypt. e.sharaf22@eng.zu.edu.eg , emanzaki2050@gmail.com Atef Eraky, Abdallah Salama, Shimaa Emad Structural Engineering Department, Faculty of Engineering, Zagazig University, Sharkia Governorate, Zagazig 44519, Egypt. aeamien@eng.zu.edu.eg , ASAbdullatif@eng.zu.edu.eg , seattia@zu.edu.eg

Citation: Sharaf, E., Eraky, A., Salama, A., Emad., S., An Innovative analytical approach for predicting the fundamental time period of moment-resisting frames, Fracture and Structural Integrity, 74 (2025) 262-293.

Received: 17.05.2025 Accepted: 05.09.2025 Published: 07.09.2025 Issue: 10.2025

Copyright: © 2025 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

K EYWORDS . Reinforced-concrete frame MRF, Equivalent stiffness, Equivalent lumped mass, Fundamental vibration period, Dynamic analysis, Sensitivity analysis.

I NTRODUCTION

he fundamental period of vibration of a building is one of the important parameters appearing in the different building codes to compute the design base shear and lateral loads. The empirical formulae found in codes are mostly based on the building type (e.g., frame or shear wall), overall size, and construction material (e.g., steel or reinforced concrete). The determination of this period is critical since it has a direct impact on the calculation of seismic loads for improving both the accuracy and reliability of the building design process. T

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