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Research Article

Effect of soil and foundation stiffness on the seismic behavior of mid-rise RC buildings

Hayri Baytan Ozmen1Naile Gül Tarakcı2

1Department of Civil Engineering, Usak University, Usak, Turkey                                                          2Graduate Education Institute, Usak University, Usak, Turkey

Keywords

Abstract


Foundation dimensions;

Foundation stiffness equation;

Nonlinear analysis;

Soil-Structure interaction; 

Soil stiffness;

Soil subgrade reaction modulus

For a more realistic approach, the effect of soil-structure interaction on the behavior of reinforced concrete buildings should not be neglected. In this study, nonlinear static pushover analysis is applied to the twenty-five 4-storey reinforced concrete frame buildings with different foundation types (raft and continuous foundation) and soils having different bearing coefficients. The foundation type and foundation sections were changed by keeping the reinforced concrete frame system constant. The stiffnesses of the models are observed to be significantly affected by the foundation dimensions and the soil bearing coefficient. Period increase up to 44% is observed per fixed base case. The lateral strength and damage distribution of buildings, seems to be less affected by foundation and soil conditions. The shear force in smaller columns becomes 8% to 24% more than anticipated by a fixed base model. The building displacement demand values with significant changes according to the fixed base case are observed. Amplifications around 40% seems to be possible per fixed base case. Additionally, an equation is established trying to answer the question of “How stiff the foundation should be for a given soil condition?”. If the allowable displacement increase per fixed base case and soil stiffness is known, dimensions of structural members of the foundation may be decided by given equation.

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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.


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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. 


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LATEST AWARDS


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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