Influence of Foundation Type on Seismic Performance of Buildings Considering Soil–Structure Interaction

Hokmabadi, Aslan S.; Fatahi, Behzad

doi:10.1142/s0219455415500431

Cited by 79 publications

(28 citation statements)

References 29 publications

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“…It has been reported that the structure supported by deep foundation experiences less storey drifts in comparison to the structure supported by the shallow foundation due to the reduced rocking components [43,44]. They concluded that the choice of foundation type is dominant and should be included while investigating the in uence of soil-structure interaction on the performance of mid-rise buildings sitting in soft soil.…”

Section: Storey Driftmentioning

confidence: 99%

Influence of foundation flexibility on the seismic response of low-to-mid-rise moment-resisting frame buildings

Tahghighi¹,

Rabiee²

2017

Scientia Iranica

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Abstract. Recent studies have shown that the e ects of Soil-Structure Interaction (SSI) may be detrimental to the seismic response of structure, and the neglect of SSI in analysis may lead to an un-conservative design. The objective of this study is to simulate the performance of multi-storey building-foundation systems through a Winklerbased approach. Four typical steel Moment-Resisting Frame (MRF) buildings on three soil types with shear wave velocities of less than 600 m/s subjected to actual ground motion records of varied hazard levels are modeled with and without SSI. It is observed that the performance level of models supported by exible foundation, particularly in an intense earthquake event, may alter signi cantly in comparison to xed-based structures. Moreover, for MRFs on soft soil, the nonlinear foundation is found to have a signi cant e ect on the force and displacement demands. This indicates the necessity for consideration of exible foundation behavior in the modern design codes in order to accomplish a more economic yet safe structural design.

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Section: Storey Driftmentioning

confidence: 99%

Influence of foundation flexibility on the seismic response of low-to-mid-rise moment-resisting frame buildings

Tahghighi¹,

Rabiee²

2017

Scientia Iranica

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“…It was determined that the seismic resistance (rotational inertia) increased in a square relationship with an increase in the plane size R ( R denotes the radial distance from the centre of gravity and one rotation corner at the bottom of the structure in a plane), whereas the seismic demand (the overturning moment) increased linearly with the plane size R. Therefore, as long as a high‐rise structure's plane size R was large enough, the structure could theoretically survive any earthquake and remain stable. In addition to reducing the seismic response by eliminating the connection between the superstructure and foundation, some scholars have proposed using the failure of the soil to form the rocking structure, and the impacts of the soil–foundation interaction on the seismic response characteristics of the rocking structure have been studied …”

Section: Introductionmentioning

confidence: 99%

Seismic performance of high‐rise building with a rock‐slip isolation system with cables

Zhang

Yin

Chen

et al. 2020

Structural Design Tall Build

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To avoid the overturning hazard of high-rise buildings with traditional isolation technology, a rock-slip structure with cables (RSSC) was proposed to improve their seismic performance. The mechanical model was established, and the motion behaviour equation of the RSSC was derived. Shake-table tests of the RSSC were performed, and the results were compared with the corresponding finite-element model simulations. The influences of key structural parameters and earthquake motion characteristics were analysed. The study results showed that the RSSC could effectively reduce the internal seismic force response and interlayer deformation under a severe earthquake, as well as decrease the overturning probability. The seismic reduction effect was influenced by the prestressed force, the aspect ratio of the structure, and the friction coefficient between the superstructure and foundation as well as seismic site type. The motion equation derived in this paper can be used to theoretically predict the motion behaviour of RSSC. K E Y W O R D Sdynamic response, high-rise building, rock-slip, seismic isolation, seismic reduction rate, shaketable test | INTRODUCTIONWith the deepening cognition of the nature of earthquake disasters, structural seismic design has evolved from the initial simple seismic resistant designs to seismic ductility designs and isolation designs. By appropriately prolonging the structure's natural vibration period to avoid sitepredominant periods, increasing damping to dissipate seismic energy, and isolating ground motion, the seismic response of the structure may be reduced. The technology of seismic isolation has been widely applied and popularized due to its good seismic reduction effect and the convenience of repair after a disaster. For middle-and low-rise structures, the installation of rubber bearings and tuned mass dampers can effectively reduce the seismic response, [1][2][3] but studies by Itoh and Gu [4] and Liu et al. [5] have also shown that the performance of rubber bearings are significantly affected by temperature changes. Additionally, for high-rise structures, [6][7][8] rubber bearings will lose function in instances of severe earthquakes, specifically when the height-width ratio is over a certain value (which is affected by the site type and earthquake degree). [9] Moreover, the entire inclination angle of a high-rise structure increases, and its integral anti-overturning performance decreases, with an increase in the height-width ratio after isolation, which can easily cause overturning, endangering adjacent buildings. [10,11] Therefore, the application of traditional seismic isolation technology in high-rise structures is not ideal. A new isolation system needs to be proposed with the development of highrise buildings, which could not only reduce the earthquake response but also effectively reduce the possibility of overturning, and easy to repair after an earthquake.Research into rocking structures can be traced back to the 19th century. [12] Subsequently, Housner [13] found that for ...

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“…Chu and Truman [15] studied the effects of pile spacing on soil-structure interaction and noted that although largely spaced pile groups have slightly larger pile head responses than closely spaced pile groups, the general effects of the pile spacing ratio on the seismic response of soil-pile systems are insignificant. Hokmabadi and Fatahi [16] concluded that the influence of the foundation type on building seismic performance is a major contributor to building seismic response with SPSI and therefore should be given careful consideration. Van Nguyen et al [17] analyzed the influence of pile size and load-bearing mechanism on the seismic performance of buildings and showed that the type and size of the piles influence the dynamic characteristics and seismic response of the building due to interaction between the soil, piled raft, and structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

Xie

Chi

Wang

2020

Mathematical Problems in Engineering

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In order to reduce the costs and improve the overall performance of building systems, the static optimized design with variable rigidity of piled raft foundations has been widely used in recent years. Variable rigidity design of piled raft foundations that support midrise buildings in high-risk seismic zones can alter the dynamic characteristics of the soil-pile-structure system during an earthquake due to soil-pile-structure interaction. To investigate these aspects, a nuclear power plant sitting on multilayered soil is simulated numerically. e paper describes a numerical modeling technique for the simulation of complex seismic soil-pile-structure interaction phenomena. It was observed that the total shear force on top of the piles and the rocking of the raft are reduced after optimization, whereas the displacement of the superstructure is nearly unaffected. e findings of this study can help engineers select a correct pile arrangement when considering the seismic performance of a building sitting on soft soil.

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Influence of Foundation Type on Seismic Performance of Buildings Considering Soil–Structure Interaction

Cited by 79 publications

References 29 publications

Influence of foundation flexibility on the seismic response of low-to-mid-rise moment-resisting frame buildings

Influence of foundation flexibility on the seismic response of low-to-mid-rise moment-resisting frame buildings

Seismic performance of high‐rise building with a rock‐slip isolation system with cables

Influence of Variable Rigidity Design of Piled Raft Foundation on Seismic Performance of Buildings

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