Boundary Effects in Simulation of Soil-Structure Interaction Problems

Edip, Kemal; Garevski, Mihail; Sheshov, Vlatko; Bojadjieva, Julijana

doi:10.1007/s11204-017-9464-2

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…Therefore, an artificial boundary is applied far away from the structure to prevent reflection of waves and get accurate results. For practical reasons and simplifications, fixed boundaries can be used at the bottom of soil zone [20]. At the soil sides, viscous dampers are considered.…”

Section: Base Isolation Systems and Tmdmentioning

confidence: 99%

“…Forcellini [19] showed that beneficial effects of base isolation systems are highly reduced when the structure located over deformable soil and SSI is considered. Edip et al [20] showed that considering the side boundaries plays an important effect on seismic response of structures. Fatollahpour et al [21] investigated the influence of considering SSI on 20-storey building response equipped with TMD at top storey.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Soil-Structure Interaction Effects on Seismic Behavior of Isolator and Mass Damper Equipped Buildings

Jasim,

Al-Hussein

2024

MMEP

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This study examines the impact of Soil-Structure Interaction (SSI) on the response of seismic-isolated buildings. Reinforced concrete office buildings with different heights are studied. The High Damping Rubber Bearing (HDRB), Lead Rubber Bearing (LRB) and Double Sliding Pendulum (DSP) isolators are utilized to isolate the buildings base. Also, Tunned Mass Damper (TMD) is implemented at top of buildings to improve building response. Soft, medium and hard soils are modelled using direct and substructure approaches. On the other hand, the influence of foundation type on buildings response is examined. The results indicate that considering SSI in soft soil reduces base shear of 6-storey building by 30%, but increases top storey displacement from 128 mm to 182 mm. It is found that base isolators are more efficient in reducing base shear (41-66%) than TMD (10-25%). Simple equations are suggested to calculate the fundamental period based on building height. The soil layer near the foundation, around 75% of the building height, primarily determines the building's response. Therefore, soil investigation can be restricted to a maximum depth of 75% of the building height. Finally, it is found that using pile foundation in soft soil alters building response to resemble that in hard soil conditions.

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Section: Base Isolation Systems and Tmdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of Soil-Structure Interaction Effects on Seismic Behavior of Isolator and Mass Damper Equipped Buildings

Jasim,

Al-Hussein

2024

MMEP

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“…In 2017, an analysis on the impact of boundary conditions on the maximum displacement of the structure was carried out [1]. Values that more than doubled were found as the difference between the maximum displacements, taking into account the SSI and a fixed base.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Second Order Effect of the SSI on the Building during a Seismic Load

et al. 2021

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The type and the properties of the soil can potentially intensify the internal forces on buildings during seismic loads. To predict the effects of the soil parameters on the soil–structure interaction of buildings, it is necessary to consider the soil–structure interaction (SSI) in the modeling process. Therefore, this document aims to evaluate the seismic effect on the maximal displacement and inter-story drift, and evaluate the behavior of buildings under the second-order effect known in the literature as the P-delta effect. For this purpose, three cases of buildings with 5, 10 and 15 stories were modelled using a FLAC 2D finite-difference element calculation software with infinite soil conditions, including five types of base with four types of soil (one cohesive soil and three non-cohesive soils) considering the soil–structure interaction and a fixed base (without soil–structure interaction). According to the results for the above-mentioned boundary, as the height of the building increases and due to the weak properties of the soil, we notice that the maximal displacements and inter-story drift increase considerably. To that purpose, we recommend considering the second-order effect in seismic design, especially for non-cohesive soil.

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“…In the literature, several authors were interested in the dynamic calculation of structures under different soil conditions. For example, Edip et al [12] analyzed the effects of soil on the frame responses using the finite element method under the impact of boundary type. Jaber et al [13] applied the mohr-coulomb model to study the plastic effects of the soil on the behavior of multi-story buildings.…”

Section: Introductionmentioning

confidence: 99%

Calculating the Dynamic Impedances of Foundations and their Effect on the Seismic Response of Structures: Analytical and Numerical Study

Boulkhiout¹,

Messast²

2021

Civil and Environmental Engineering Reports

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This study evaluates the movement of a frame built on soft soil under seismic excitation taking into account soil-structure interaction. First, the study was evaluated using the finite element method, then, by using a substructure method which modelled the soil using springs and dampers in a linear and nonlinear study. Rheological models were determined using impedance functions, calculated using a numerical program CONAN. These dynamic impedances are shown in the displacement vector of a three-degrees-of-freedom frame, which was calculated on the basis of lateral forces distributed over the structure height using the equivalent static method. In this regard, two different calculation norms were chosen; RPA2003 and UBC97. Finally, a parametric study was carried out, based on the effects of soil densification and the foundation geometry on the response of the RC frame.

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Boundary Effects in Simulation of Soil-Structure Interaction Problems

Cited by 9 publications

References 2 publications

Assessment of Soil-Structure Interaction Effects on Seismic Behavior of Isolator and Mass Damper Equipped Buildings

Assessment of Soil-Structure Interaction Effects on Seismic Behavior of Isolator and Mass Damper Equipped Buildings

Analysis of the Second Order Effect of the SSI on the Building during a Seismic Load

Calculating the Dynamic Impedances of Foundations and their Effect on the Seismic Response of Structures: Analytical and Numerical Study

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