Effects of Soil-Structure Interaction on the Seismic Response of Base Isolated in High-Rise Buildings

Hatami, Farzad; Nademi, Hamed; Rahaie, Mohammad

doi:10.18178/ijscer.4.3.237-242

Cited by 4 publications

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“…Result concludes that, base isolation is efficient to counterbalance the structural irregularity of structure and gives better performance [22]. Hatami, F. et al (2015) studied soil structure interaction with the base isolation system. An actual ten-story base isolator structure designed in compliance with IBC-2009 was modelled.…”

Section: Table 1 Results For Design Parametersmentioning

confidence: 97%

“…Furthermore, the study emphasized that the soil-structure interaction (SSI) is important in Int. J. of Analytical, Experimental and Finite Element Analysis https://www.rame.org.in/ijaefea earthquake design and should be taken care of [8]. 2016) evaluated the static and seismic stability of a retrofitted residential six-story SMRF structure built in 1955.…”

Section: Table 1 Results For Design Parametersmentioning

confidence: 99%

“…The major benefit is obtained from the period shift and the secondary benefit is obtained from the further available damping in the isolation layer. Use of base isolation not only increases fundamental period 1.5-3 times but also increases damping to more than 15% [8].…”

Section: Base Isolationmentioning

confidence: 99%

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Base Isolation: A Versatile Seismic Control Tool-A Review

Deshmukh

2023

Int j anal exp finite elem anal

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Past study on earthquake prominently bring into notice that, earthquake protective structure is falls notion. Only possible fact is to resistant vulnerable effects through control systems which limits the damage within permissible even under the greatest possible earthquake. There are many such systems available and serving the purpose from last two decade like passive, active and hybrid earthquake control systems. Passive control systems comprise base isolators, tuned mass damper etc. are most popular out of all. Base isolation is the most accepted member of the family due to its compatibility in hardware, applications, design codes and retrofit manuals. The most popular seismic isolation systems use elastomeric bearings which consist of rubber and steel plates with an energy dissipation mechanism. Common isolation systems in use today include elastomeric and sliding bearings with and without dampers or damping mechanisms. This review paper includes conceptual working principal, methodology, and types of available isolators. It also summarizes effect of different available isolator and their applicability on design parameters like storey drift, storey displacement, base shear and time period form literature. This study presents a comparative table of different parameters such as frequency, base shear, displacement, and story drift with and without base isolation from literature.

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Section: Table 1 Results For Design Parametersmentioning

confidence: 97%

Section: Table 1 Results For Design Parametersmentioning

confidence: 99%

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Base Isolation: A Versatile Seismic Control Tool-A Review

Deshmukh

2023

Int j anal exp finite elem anal

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“…A number of studies on the relevance of SSI in base-isolated buildings have been reported [6,8,9,11,[28][29][30]. These studies conclude that the consideration of SSI is not necessary, unless the soil is very soft and the building is relatively stiff; moreover, commonly, the SSI effect is rather beneficial.…”

Section: Soil-structure Interaction Modellingmentioning

confidence: 99%

Suitability of Seismic Isolation for Buildings Founded on Soft Soil. Case Study of a RC Building in Shanghai

Almansa

Weng

et al. 2020

Buildings

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Base (seismic) isolation is a promising technology for seismic protection of buildings and other constructions. Nowadays, it is accepted that such a technique is efficient and reliable; however, it has two major limitations: soft foundation soil, and tall buildings. The first issue restrains the seismic isolation spreading, given that soft soil is frequent in densely populated areas, and usually such a soil type concentrates the highest seismicity levels. This paper aims to contribute to demonstrating that base isolation, if properly implemented, can be suitable for soft soil. A representative case study is analyzed: a 6-story reinforced concrete (RC) building with base isolation that has recently been built in Shanghai. Since the building is founded on soft soil, concern regarding base isolation suitability arose; even the Chinese design code does not recommend this solution for soft soil. To clarify this issue, non-linear time-history analyses are carried out for a number of natural and artificial seismic inputs that represent the site seismicity; the superstructure behavior is linear, while nonlinearities are concentrated in the isolation layer. The adequacy of base isolation is assessed in the superstructure (in terms of reduction of interstory drift, absolute acceleration and shear force) and in the isolation layer (in terms of axial force, torsion angle and shear strain). The relevance of soil–structure interaction is discussed. The behavior when the mechanical parameters of the isolation units have experienced important changes is also analyzed. The major conclusion is that base isolation of ordinary mid-height RC buildings founded on soft soil can perform satisfactorily in medium seismicity regions.

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“…In view of structural engineering (Mondal and Jain 2005), the engineering community discussed SSI only when the basement motion by interaction forces as compared to the ground motion of free field (Alam and Bhuiyan 2013). The force and deformation in the supporting soil cause vibration of structure and produce base shear, moment and displacement (Hatami 2015;Baratta et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of soil condition on seismic response of isolated base buildings

Hassan

Pal

2018

Int J Adv Struct Eng

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In the present paper, nonlinear time history and response spectrum analyses were carried out using Etabs-2015 software to study the influence of soil condition beneath the isolated base. The effects of soil flexibility are considered in the current study to examine the differences in spectral acceleration, base shear, story displacements, story drifts and story shear obtained following the seismic provisions of Indian standard code. Various soils are systematically compared and discussed for a seismic performance of multistory buildings. Parametric analysis of the buildings fitted with isolation devices is carried out to choose the appropriate type of soil. The study shows that the value of base shear increases with an increase of soil flexibility and superstructure stiffness. It also observed that the spectral acceleration (SA) and spectral displacement (SD) are higher in soft soil condition, which gives us evidence that the response spectral of a structure is associated with soil condition. The paper concluded that the hard soil and medium soil are suitable for base isolation building. In addition, analysis and design considerations for base isolated and conventional structures are suggested to enable the designer to get a better understanding at the preliminary design stage.

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Effects of Soil-Structure Interaction on the Seismic Response of Base Isolated in High-Rise Buildings

Cited by 4 publications

References 0 publications

Base Isolation: A Versatile Seismic Control Tool-A Review

Base Isolation: A Versatile Seismic Control Tool-A Review

Suitability of Seismic Isolation for Buildings Founded on Soft Soil. Case Study of a RC Building in Shanghai

Effect of soil condition on seismic response of isolated base buildings

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