Comparison of the Vibration Response of Reinforced Concrete and Composite Structure 10-Story Buildings

¹ Laboratory of Applied Sciences, National School of Applied Sciences, Abdelmalek Essaâdi University, Al Hoceima, Morocco
² National Graduate School of Arts and Crafts, ENSAM, University of Moulay Ismail, Meknes, Morocco
³ Private University of Fez, Morocco
⁴ Laboratory of Applied Sciences, National School of Applied Sciences, Abdelmalek Essaâdi University, Al Hoceima, Morocco
⁵ Laboratory of Solid-State Physics, Department of Physics, Faculty of Science Dhar El Mahraz, Sidi

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it. .

Abstract

Taking seismic forces into account is a fundamental aspect of structural design. This enables the vibrational response of buildings to be calculated and analysed in order to improve buildings safety in the event of an earthquake. This is why the analysis of the results from the dynamic study helps to highlight the impact of the structural system on the building's behaviour. This study analyses the influence of the structural system on the vibration response of a 10-story building located in the seismic zone of Al Hoceima city, Morocco, by comparing a reinforced concrete model to a composite structure model. The objective is to determine which of these two systems offers the best performance in terms of modal participation and overall seismic stability. The methodology adopted involves converting and verifying both structures which are modelled in ETABS software using identical geometric characteristics and loads. The dynamic analysis was performed using the Al Hoceima 2016 earthquake accelerogram applied to both structural models. A modal and dynamic analysis is then carried out, and the results are compared with the regulatory estimates derived from Eurocode 8. The modal analysis reveals a significant difference between the two structural systems. The fundamental period of the reinforced concrete structure is 2.48 s, while that of the composite structure is 3.94 s. The inter-story deflections remain below the regulatory limit of 0.005 in both directions. Significant discrepancies, ranging from 55% to 82%, are observed between the calculated periods and the estimated values. This study constitutes the first stage of a more in-depth investigation aims at analysing the influence of soil-structure interaction on the building's dynamic response and at completing the comparison between the two structural systems.