Dynamic response of stand-alone and adjacent footing on saturated sand

Barrios, Gonzalo; Uemura, Kentaro; Kikkawa, Naotaka; Itoh, Kazuya; Larkin, Tam; Orense, Rolando P.; Chouw, Nawawi

doi:10.1016/j.soildyn.2021.106584

Cited by 8 publications

(5 citation statements)

References 34 publications

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“…In the case of scaled experiments, for example, centrifuge tests described in Barrios et al., 21 the frequency content of the earthquake and the fundamental frequency of the structure, consequently, the frequency content of the excitation are incorrectly represented because any scaling will affect the time dimension. Therefore, in contrast to 1‐g experiments, in scaled experiments, while the initial vertical stresses are properly simulated, the stress state in the soil due to the earthquake is inaccurately replicated.…”

Section: Experimental Methodologymentioning

confidence: 99%

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Experimental study of the seismic response of a structure set amongst closely adjacent structures

Barrios

Larkin

Chouw

2021

Earthq Engng Struct Dyn

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The influence of soil on the dynamic response of soil-structure systems is usually studied on a stand-alone (SA) structure, even though closely adjacent structures form the vast majority of the population, especially in large cities. When structures are closely adjacent to each other, the wavefield in the soil, generated by the vibration of the footings, produces a complex interaction between them. Scant attention, especially by physical experiments, has been paid to this interaction. This work addresses the seismic response of a single degree-of-freedom structure (structure of focus) considering the influence of one and two closely adjacent neighbours. Experiments were performed using a large laminar box filled with sand sitting on a shake table. Results from utilising four recorded ground motions from the 2010-2011 Canterbury earthquake sequence are analysed. The effect of adjacent structures on the acceleration and displacement of the top mass of each structure, as well as the uplift of the footings, are discussed. Changes in the fundamental frequency due to the presence of neighbouring structures are identified. The use of the SA system, without consideration of closely adjacent structures, may result in a significant error in the estimation of the response of the structure of focus. In general, acceleration, lateral displacement and uplift reduced in comparison with that of the corresponding SA case. A footing settlement mechanism, resulting from uplift of the system that reflects the influence of adjacent structures, is also revealed.

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Section: Experimental Methodologymentioning

confidence: 99%

“…These works showed changes in the bending moment and base shear at the structure support, due to an adjacent structure. Also using a geotechnical centrifuge, Barrios et al 21 . investigated the performance of surface footings with different distances on saturated sand.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the seismic response of a structure set amongst closely adjacent structures

Barrios

Larkin

Chouw

2021

Earthq Engng Struct Dyn

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“…Experimental methods (centrifuge tests [27][28][29][30][31] and shaking table test [32][33][34][35][36][37] ) represent an important validation point for numerical models and provide preliminary estimates of the effects of complex interaction problems. The disadvantages of the experimental methods are that they are technically challenging to undertake and pose several difficulties in achieving appropriate scaling of the soil strains and inertial forces.…”

Section: Introductionmentioning

confidence: 99%

Seismic Structure‐Soil‐Structure Interaction between inelastic structures

Vicencio,

Alexander,

Málaga‐Chuquitaype

2024

Earthq Engng Struct Dyn

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Frequently, buildings in urban areas are designed by considering their stand‐alone response, that is, as single structures with no neighboring buildings. Nevertheless, the existence of a high density of buildings in large metropolitan areas inevitably results in the likelihood of an important seismic interaction between adjacent buildings through the underlying soil. This paper explores the effects of Structure‐Soil‐Structure Interaction (SSSI) on the seismic response of two yielding structures embedded in a linear elastic soil. A simple two‐dimensional nonlinear reduced‐order parametric model is proposed, where different building parameters are considered. A nonlinear phenomenological Bouc–Wen model is assumed for the buildings. A database of 15 strong ground motion records and an additional spectrally matched seismic ground motion are considered. An extensive parametric study comprising over two million nonlinear cases is conducted. The results show important differences between nonlinear SSSI and nonlinear SSI for particular parameter configurations. Nevertheless, due to energy dissipation and increases in damping in the nonlinear case, the effects of SSSI are less relevant compared with the linear case.

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“…The results of different centrifuge experiments show that SSSI effects are most significant for low-intensity earthquake shaking (Trombetta et al, 2014(Trombetta et al, , 2015, and SSSI can significantly alter the response of proximally located urban structures (Jabary and Madabhushi, 2017). SSSI affected structure response in both time and frequency domains, especially the Fourier amplitudes and pseudo accelerations of structural base acceleration at the frequencies near the natural frequency of adjacent structure (Barrios et al, 2021;Ngo et al, 2019;Wang et al, 2022). In one word, these experiments can provide reliable result of the SSSI, however, the time and labor costs are relatively high.…”

Section: Introductionmentioning

confidence: 99%

Numerically study of SSSI effect on nuclear power plant on layered soil

Chen

Zhao

Zhang

et al. 2023

Lat. Am. j. solids struct.

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In typical dynamic soil-structure interaction (SSI) problems, the dynamic response a structure can be affected by the existence of some nearby structures, which is sometimes referred to as the dynamic structure-soilstructure interaction (SSSI). This effect is especially important in the earthquake engineering design of adjacent nuclear power plants, as the safety risk is relatively high. However, the current understanding on the SSSI of nuclear power plants is still insufficient. In this work, we use the finite element method to investigate the SSSI of two nuclear power plants located at a specific distance under earthquake excitation. Four nuclearpower-plant-soil systems are designed to account for the SSI and SSSI respectively, where the soil properties are obtained from drilling data. The effect of the SSSI on the nuclear power plants is studied by comparing the dynamic responses of four nuclear power plants-soil systems in vertical and horizontal directions, in which both layered soils and local weak interlayer soils are considered. The results of numerical study show that the presence of one nuclear power plant has a favorable effect on the seismic response of an adjacent nuclear power plant, such as reducing the displacement response, but this effect is limited. In addition, the SSSI effect is related to not only the soil properties, but also the direction of ground motion. Furthermore, the existence of soft soil layers complicates the SSSI effect. The results provide important insights for the construction and expansion of nuclear power plants.

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Dynamic response of stand-alone and adjacent footing on saturated sand

Cited by 8 publications

References 34 publications

Experimental study of the seismic response of a structure set amongst closely adjacent structures

Experimental study of the seismic response of a structure set amongst closely adjacent structures

Seismic Structure‐Soil‐Structure Interaction between inelastic structures

Numerically study of SSSI effect on nuclear power plant on layered soil

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