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Research Article

The effect of material strength and discontinuity in RC structures according to different site-specific design spectra

Ercan Işık1, Ehsan Harirchian2, Hüseyin Bilgin3, Kirti Jadhav4

1Department of Civil Engineering, Bitlis Eren University, Bitlis, Turkey

2Institute of Structural Mechanics (ISM), Bauhaus-Universität Weimar, Weimar, Germany

3Department of Civil Engineering, Epoka University, Tirana, Albania

4Faculty of Civil Engineering , Bauhaus-Universität Weimar, Weimar, Germany



Structural analysis; 

Design spectra; 

Material strength;


Seismic-induced damages in reinforced-concrete (RC) buildings were primarily associated with materials’ low strength and poor properties. This study aims to investigate the seismic response of RC structures according to the different material’s strength and design spectra. Adaptive static pushover and eigenvalue analysis were performed for four different design spectra, five types of concrete, and two reinforcement grades. Four different design spectra were obtained by considering discrete geographical locations with different earthquake risks via the updated Turkish Earthquake Hazard Map 2018. Structural analysis was carried out for a sample RC building using these spectrum curves and material strengths. It has been observed that the structure becomes more rigid as the strength of concrete increases. This situation manifested itself with an increase in period values and a decrease in the stiffness values. Stiffness values of the building are independent of reinforcement. As the concrete strength decreases, the structure’s seismic capacity decreases while the displacement’s demand for predicted performance levels increases. Moreover, an increase in the tensile strength of reinforcements substantially increases the seismic capacity of the building. The study also determines that the site-specific design spectra obtained for different provinces are used in the analysis affects the demand displacements values considerably. The material differentiation between the stories in the building was also examined in this study. It can be a source in terms of how material discontinuity affects building performance.

© 2021 MIM Research Group. All rights reserved.


8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

21/10/2023 Journal Submission System Upgrade Completed: We're delighted to announce that our Journal Submission and Tracking System has undergone a significant upgrade, aimed at enhancing your experience. We apologize for the delay, and any inconvenience it may have caused. Here are the key enhancements from a user perspective:

Improvements are designed to make your interaction with our journal smoother and more efficient. Please take the upgraded system for a spin and share your thoughts with us. If you encounter any issues or have questions, please don't hesitate to reach out to our support team.

27/12/2022 Reviewer AwardsThe winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 

(More details of the news may be given in the News section)

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2022 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 

2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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