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- W1494701423 abstract "To obtain the stress distribution within a shallow foundation, a distributed spring approach is proposed to represent soil behavior. Relevant analytical formulations for grid and raft foundations are derived on the basis of the lumped stiffness coefficients developed by Gazetas and recommended in modern codes such as FEMA 356 [2000] Federal Emergency Management Agency (FEMA). 2000. “Prestandard and commentary for the seismic rehabilitation of buildings”. In Report No. FEMA-356, 2000 Washington D.C. [Google Scholar]. The efficacy of the proposed formulations to represent the overall dynamic behavior and seismic response of the building frames with grid and raft foundations is checked against the established Gazetas scheme. A limited parametric study is also made to observe the effect of soil damping. This helps to arrive at a suitable damping ratio for combined structure-foundation-soil system. Subsequently, the variations in stress distributions incorporating the effect of soil-structure interaction at various locations of two types of foundations are also presented for some representative cases. Results show a substantial increase in the bending moment and shear force in the foundation itself due to such interaction effect. Such increase is observed to be strongly dependent on the framing action of the structure. This emphasises the necessity of considering this effect for safe seismic design. To this end, Distributed approach proposed in the present article may be conveniently employed with the help of any standard building analysis software besides using the outcomes of the parametric studies presented herein." @default.
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- W1494701423 date "2008-12-17" @default.
- W1494701423 modified "2023-10-17" @default.
- W1494701423 title "Effect of Flexibility of Foundations on its Seismic Stress Distribution" @default.
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- W1494701423 doi "https://doi.org/10.1080/13632460802211974" @default.
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