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Earthquakes and Structures Volume 22, Number 3, March 2022 , pages 219-230 DOI: https://doi.org/10.12989/eas.2022.22.3.219 |
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Effects of soil-structure interaction and variability of soil properties on seismic performance of reinforced concrete structures |
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Mohammed Mekki, Miloud Hemsas, Meriem Zoutat and Sidi M. Elachachi
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| Abstract | ||
| Knowing that the variability of soil properties is an important source of uncertainty in geotechnical analyses, we will study in this paper the effect of this variability on the seismic response of a structure within the framework of Soil Structure Interaction (SSI). We use the proposed and developed model (N2-ISS, Mekki et al. 2014). This approach is based on an extension of the N2 method by determining the capacity curve of the fixed base system oscillating mainly in the first mode, then modified to obtain the capacity curve of the system on a flexible basis using the concept of the equivalent nonlinear oscillator. The properties of the soil that we are interested in this paper will be the shear wave velocity and the soil damping. These parameters will be modeled at first, as independent random fields, then, the two parameters will be correlated. The results obtained showed the importance of the use of random field in the study of SSI systems. The variability of soil damping and shear wave velocity introduces significant uncertainty not only in the evaluation of the damping of the soil-structure system but also in the estimation of the displacement of the structure and the base-shear force. | ||
| Key Words | ||
| damping; seismic performance; shear wave velocity; soil structure interaction; uncertainty; variability | ||
| Address | ||
| Mohammed Mekki:LM2SC Laboratory, Department of Civil Engineering, Faculty of Architecture and Civil Engineering, University of Sciences and Technology Mohamed Boudiaf, BP 1505 El Mnaouer, 31.000, Oran, Algeria Miloud Hemsas: LSTE Laboratory, Department of Civil Engineering, Faculty for Sciences and Technology, University of Mascara, BP 763, Route de Mamounia, 29000, Mascara, Algeria Meriem Zoutat:LM2SC Laboratory, Department of Civil Engineering, Faculty of Architecture and Civil Engineering, University of Sciences and Technology Mohamed Boudiaf, BP 1505 El Mnaouer, 31.000, Oran, Algeria Sidi M. Elachachi:I2M Laboratory, GCE Department, University of Bordeaux, UMR 5295, bat. B18, Av des Facultés, 33405, Talence, France | ||