A comparative study of soil-structure interaction in the case of frame structures with raft foundation

Móczár, Balázs; Polgár, Zsuzsanna; Mahler, András

doi:10.1515/rmzmag-2016-0001

Cited by 1 publication

(3 citation statements)

References 7 publications

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“…This is not the same for shear forces in columns where the top floor columns require more modes to be included than the lower columns for the same accuracy. These findings are in agreement with the findings of [3,5].…”

Section: Resultssupporting

confidence: 93%

“…It is observed that the periods decrease as the modulus of elasticity of the foundation soil increases. This observation is in agreement with the findings of [3,8]. More runs of SAP2000 [10] were carried out to investigate the effect of varying number of modes on the accuracy of the frame response of story displacement, and column shear forces.…”

Section: Resultssupporting

confidence: 87%

“…They research concluded that as the soil stiffness increases, the fundamental period for the structural model decreases, and that the fundamental period for the structural model is not only a function of building height but also a function of SSI. Authors in [3] carried out a theoretical study on a 8-story reinforced concrete frame on raft foundation www.etasr.com Alomari: The Effect of Mass, Depth, and Properties of the Soil Below the Raft Foundation on the … including the soil mass below to study the effect of SSI on the settlement of the structure, bearing pressure, and bending moments in the raft and stresses on slabs. Authors in [4] analyzed a 15-story R. C. moment resisting frames founded on soft soils, with bedrock depths of 10, 20, and 30 meters.…”

Section: Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Mass, Depth, and Properties of the Soil Below the Raft Foundation on the Seismic Performance of R.C. Plane Frames

Ahmad

2019

Eng. Technol. Appl. Sci. Res.

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Soil structure interaction has been the subject of numerous studies. The foundation soil has a definite effect on the performance of structures during seismic excitation. Recent studies show that the effect of soil-structure interaction SSI may be detrimental to the structure during seismic excitation. In this study, the effect of consideration of the soil below foundation and its depth, and the soil modulus of elasticity on the response of structures is investigated. The number of mode shapes considered has an effect on the accuracy of the values of structure response. A structural model consisting of an 8-story reinforced concrete frame resting on raft foundation, and including the soil below the raft is analyzed. The frame is analyzed using SAP2000 software, and time history and modal analysis are carried out with varying values of both soil depth and soil modulus of elasticity. The soil below the foundation is connected to the raft elements by gap links. Gap element links are compression–only members with appropriate stiffness, which are active only in compression. Modal analysis results show that the periods of vibration decrease as the modulus of elasticity of the soil increases. Periods of vibration of the frame without the soil mass consideration are less than those when the soil mass below the raft is considered, and they increase with increased depth of foundation to a certain limit. The structures response in the form of columns shear forces and story displacements are also evaluated under the variable parameters considered.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 87%