Nonlinear Soil–Foundation–Structure and Structure–Soil–Structure Interaction: Centrifuge Test Observations

2014 ◽  
Vol 140 (5) ◽  
pp. 04013057 ◽  
Author(s):  
Nicholas W. Trombetta ◽  
H. Benjamin Mason ◽  
Tara C. Hutchinson ◽  
Joshua D. Zupan ◽  
Jonathan D. Bray ◽  
...  
Keyword(s):  
Soil Structure ◽  
Soil Structure Interaction ◽  
Centrifuge Test ◽  
Structure Interaction ◽  
Soil Foundation ◽  
Foundation Structure

Nonlinear Soil–Foundation–Structure and Structure–Soil–Structure Interaction: Engineering Demands

2015 ◽  
Vol 141 (7) ◽  
pp. 04014177 ◽  
Author(s):  
Nicholas W. Trombetta ◽  
H. Benjamin Mason ◽  
Tara C. Hutchinson ◽  
Joshua D. Zupan ◽  
Jonathan D. Bray ◽  
...  
Keyword(s):  
Soil Structure ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Soil Foundation ◽  
Foundation Structure

Fragility curve modifiers for reinforced concrete dual buildings, including nonlinear site effects and soil–structure interaction

2020 ◽  
Vol 36 (4) ◽  
pp. 1930-1951 ◽  
Author(s):  
Christos Petridis ◽  
Dimitris Pitilakis
Keyword(s):  
Reinforced Concrete ◽  
Soil Structure ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Soil Profiles ◽  
Soil Behavior ◽  
Structure Interaction ◽  
Nonlinear Soil Behavior ◽  
Soil Foundation ◽  
Foundation Structure

We investigate the influence of soil–structure interaction (SSI) and nonlinear soil behavior on the seismic fragility of reinforced concrete (RC) dual (frame + shear wall) buildings resting on shallow foundations. This article includes a holistic methodology to account for nonlinear soil behavior and soil–foundation–structure interaction in a modular way. Using nonlinear dynamic analyses, we derive fragility curves for a wide set of building typologies and soil profiles, showing that soil behavior during strong shaking significantly affects the vulnerability of the soil–foundation–structure system. The influence of SSI is pronounced mostly for soft soil profiles, varying in a building-specific way. Post-processing of our results evolves into a set of fragility modifiers that enable risk analysts to massively account for soil-related and/or SSI effects in large-scale risk assessments.

scholarly journals Soil-structure interaction effects on modal parameters of office buildings with different number of stories

2018 ◽  
Vol 219 ◽  
pp. 03001 ◽  
Author(s):  
Natalia Lasowicz ◽  
Tomasz Falborski
Keyword(s):  
Soil Structure ◽  
Interaction Effects ◽  
Office Buildings ◽  
Soil Structure Interaction ◽  
Modal Parameters ◽  
Soil Conditions ◽  
Fundamental Vibration ◽  
Shear Moduli ◽  
Structure Interaction ◽  
Soil Foundation

The paper summarizes the results of a numerical investigation designed to study the soil-structure interaction effects on modal parameters of three office buildings. The reinforced-concrete 4-storey, 8-storey, and 12-storey office buildings, each with additional two levels of embedded basements, represent low, medium, and high-rise structures, respectively. In order to conduct this research, detailed finite-element structure models were prepared. Soil-foundation flexibility was represented with the use of spring-based solutions, incorporating foundation springs and dashpots. The influence of diverse soil conditions (represented by their average effective profile velocities and shear moduli) on the dynamic characteristics of the analyzed three office buildings (e.g. fundamental vibration periods) was investigated and discussed.

scholarly journals Effect of Soil Structure Interaction on Torsional Response of Structure Supported by Asymmetric Soil Foundation System

2016 ◽  
Vol 2016 ◽  
pp. 1-14
Author(s):  
Fangyuan Zhou ◽  
Xuezhang Wen ◽  
Hongping Zhu
Keyword(s):  
Soil Structure ◽  
Seismic Excitation ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Torsional Response ◽  
The Asymmetry ◽  
Soil Foundation

The torsional response of a structure supported by asymmetric foundation was investigated in this study. Several types of the asymmetric soil foundation system were employed to analyze the effect of soil structure interaction on torsional response of the superstructure. It can be concluded from the study that torsional response would be generated for a structure supported by asymmetric soil foundation system under horizontal seismic excitation, and the generated torsional response of the superstructure changed with the degree of the asymmetry of the foundation.

Behavior of the Leaning Tower of Pisa: Insights on Seismic Input and Soil-Structure Interaction

2016 ◽  
Vol 847 ◽  
pp. 454-462 ◽  
Author(s):  
Raffaello Bartelletti ◽  
Gabriele Fiorentino ◽  
Giuseppe Lanzo ◽  
Davide Lavorato ◽  
Giuseppe Carlo Marano ◽  
...  
Keyword(s):  
Earthquake Engineering ◽  
Soil Structure ◽  
Dynamic Monitoring ◽  
Element Analysis ◽  
Structure Interaction ◽  
Scenario Earthquakes ◽  
The Finite Element Analysis ◽  
Soil Foundation ◽  
Foundation Structure ◽  
Made In

The most recent studies about the seismic behavior of the leaning Tower of Pisa that consider the soil-foundation-structure interaction date back to twenty years ago. From 1999 to 2001, the foundation of the monument was consolidated by means of under-excavation and the "Catino" at the basement was rigidly connected to the foundation. Meanwhile, significant progresses have been made in the field of earthquake engineering. Therefore, the need exists to assess the dynamic behavior of the Tower in light of the novelties occurred in the past decades. In the present study, the mechanical characteristics of the foundation have been calibrated comparing the outcomes of the experimental dynamic monitoring with the results of the finite element analysis performed on a simple but effective model. The scenario earthquakes for return periods equal to 130 years and 500 years are also presented.

scholarly journals Fast simulation of railway bridge dynamics accounting for soil–structure interaction

2021 ◽  
Author(s):  
P. Galvín ◽  
A. Romero ◽  
E. Moliner ◽  
D. P. Connolly ◽  
M. D. Martínez-Rodrigo
Keyword(s):  
Dynamic Response ◽  
Soil Structure ◽  
Dynamic Stiffness ◽  
Computational Cost ◽  
Soil Structure Interaction ◽  
Fe Model ◽  
Structure Interaction ◽  
Railway Traffic ◽  
Soil Foundation ◽  
Stiffness And Damping

AbstractA novel numerical methodology is presented to solve the dynamic response of railway bridges under the passage of running trains, considering soil–structure interaction. It is advantageous compared to alternative approaches because it permits, (i) consideration of complex geometries for the bridge and foundations, (ii) simulation of stratified soils, and, (iii) solving the train-bridge dynamic problem at minimal computational cost. The approach uses sub-structuring to split the problem into two coupled interaction problems: the soil–foundation, and the soil–foundation–bridge systems. In the former, the foundation and surrounding soil are discretized with Finite Elements (FE), and padded with Perfectly Match Layers to avoid boundary reflections. Considering this domain, the equivalent frequency dependent dynamic stiffness and damping characteristics of the soil–foundation system are computed. For the second sub-system, the dynamic response of the structure under railway traffic is computed using a FE model with spring and dashpot elements at the support locations, which have the equivalent properties determined using the first sub-system. This soil–foundation–bridge model is solved using complex modal superposition, considering the equivalent dynamic stiffness and damping of the soil–foundation corresponding to each natural frequency. The proposed approach is then validated using both experimental measurements and an alternative Finite Element–Boundary Element (FE–BE) methodology. A strong match is found and the results discussed.

An Analytical Approach to Torsionally Coupled Seismic Response of Eccentric Structure Incorporating Soil-Structure Interaction

2012 ◽  
Vol 256-259 ◽  
pp. 2106-2110
Author(s):  
Xin Liang Jiang ◽  
Yue Li
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Analytical Approach ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Foundation Soil ◽  
Structure Interaction ◽  
Mode Method ◽  
Soil Foundation ◽  
Eccentric Structure

An analytical approach based on branch mode method is formulated in this paper to study the dynamic response of eccentric structure considering soil-structure interaction The superstructure branch and foundation soil branch are coupled through mode aggregation procedure. The computational scale of system equations decreases to an acceptable level. Sample analysis indicate that the seismic response of eccentric structure increases first and then decreases with the decreasing of stiffness of soil-foundation system, which is affected by the inertia effect of foundation branch. For the soft soil case, the influence of SSI effect is more intensive that the trends of transfer function curves are fundamentally changed comparing to the results of other foundation conditions.

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