Abstract

Due to soil-structure interaction, dynamic lateral earth pressures on building embedded walls affect the dynamic performance of the building. Classic relations such as Mononobe-Okabe (M − O) and Seed & Withman (S–W) are applied to determine these dynamic lateral earth pressures in conventional design methods. Considering these relations' assumptions and their neglect of soil-structure interactions during an earthquake, using these relations may result in erroneous and inaccurate estimation of dynamic earth pressure. This paper attempts to understand this phenomenon better and estimate dynamic earth pressure on basement walls. Structure and soil mass are simulated simultaneously, using numerical models. Numerical (finite element) dynamic analyses are carried out for qualitative and quantitative evaluation of dynamic earth pressures on buildings with basements. Different excavation depths, ground topography, geotechnical parameters, and building stories above ground have been considered in these analyses. Finally, the soil-structure interaction response has been discussed using the obtained results, and approximate relations are derived to estimate the dynamic earth pressure.

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