Dynamic Ice-Water-Soil-Structure Interaction Of Offshore Timers Including Nonlinear Soil Behavior

1977 ◽  
Author(s):  
A.K. Haldar ◽  
A.S.J. Swamidas ◽  
D.V. Reddy ◽  
M.K. Arockiasamy
Keyword(s):  
Soil Structure ◽  
Soil Structure Interaction ◽  
Soil Behavior ◽  
Structure Interaction ◽  
Nonlinear Soil Behavior ◽  
Ice Water

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 Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

2020 ◽  
Vol 6 (12) ◽  
pp. 2290-2311
Author(s):  
Kamel Bezih ◽  
Alaa Chateauneuf ◽  
Rafik Demagh
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Soil Structure ◽  
Element Model ◽  
Soil Structure Interaction ◽  
Structural Safety ◽  
Soil Behavior ◽  
Rc Structures ◽  
Structure Interaction

Lifetime service of Reinforced Concrete (RC) structures is of major interest. It depends on the action of the superstructure and the response of soil contact at the same time. Therefore, it is necessary to consider the soil-structure interaction in the safety analysis of the RC structures to ensure reliable and economical design. In this paper, a finite element model of soil-structure interaction is developed. This model addresses the effect of long-term soil deformations on the structural safety of RC structures. It is also applied to real RC structures where soil-structure interaction is considered in the function of time. The modeling of the mechanical analysis of the soil-structure system is implemented as a one-dimensional model of a spring element to simulate a real case of RC continuous beams. The finite element method is used in this model to address the nonlinear time behavior of the soil and to calculate the consolidation settlement at the support-sections and the bending moment of RC structures girders. Numerical simulation tests with different loading services were performed on three types of soft soils with several compressibility parameters. This is done for homogeneous and heterogeneous soils. The finite element model of soil-structure interaction provides a practical approach to show and to quantify; (1) the importance of the variability of the compressibility parameters, and (2) the heterogeneity soil behavior in the safety RC structures assessment. It also shows a significant impact of soil-structure interaction, especially with nonlinear soil behavior versus the time on the design rules of redundant RC structures. Doi: 10.28991/cej-2020-03091618 Full Text: PDF

scholarly journals Prediction of final settlements of buildings constructed on expansive soils

2015 ◽  
Vol 4 (3) ◽  
pp. 424
Author(s):  
María-de-la-Luz Pérez-Rea ◽  
Tania Ayala ◽  
Victor Castano
Keyword(s):  
Soil Structure ◽  
Expansive Soils ◽  
Volumetric Strain ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Soil Structure Interaction ◽  
Soil Behavior ◽  
Building Conditions ◽  
Structure Interaction ◽  
Strain Coefficient

Because the action of the swelling pressure, the settlements caused by the transmitted load from the structure on expansive soils, and the settlements calculated by classic theories of soils mechanics are different. This swelling pressure acts in opposite direction to the weight of the building. In this paper, the authors propose the use of a volumetric strain coefficient by settlements exp, in a soil-structure interaction algorithm taking into account the expansive soil behavior in the reduction of the settlement magnitude when a building is placed above soil. It’s necessary to know the initial properties of the expansive unsaturated soil and the load building conditions. A laboratory process is described for determining the aexpcoefficient.

Optimization of Soil Structure Effect by the Addition of Dashpots in Substratum Modelization

2019 ◽  
pp. 186-200
Author(s):  
Souhaib Bougherra ◽  
Mourad Belgasmia
Keyword(s):  
Design Process ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Structural Behavior ◽  
Soil Parameters ◽  
Soil Behavior ◽  
Structure Interaction ◽  
Fixed Base ◽  
Static Approach ◽  
Nonlinear Static

Soil structure interaction can significantly affect the behavior of buildings subjected to seismic attacks, wind excitation, and other dynamic loading types. Different researches were developed in the last decade demonstrating the importance of taking account of soil properties and its effect in changing the behavior of the structures. It is common practice to analyze the structures assuming a fixed base, but this approach is not appropriate for the reason that neglecting the soil parameters such as the stiffness and the damping affect the behavior of the structure. Therefore, the nonlinear static approach provided the nonlinear response behavior of a structure for different types of soil. In this chapter, the authors will discuss some proposed methods in taking account of soil-structure interaction that must be considered from the very beginning of the design process and its impact on the structural behavior optimization by adding springs and dashpots to reproduce the soil behavior.

scholarly journals Study on Dynamic Structure-Soil-Structure Interaction of Three Adjacent Tall Buildings Subjected to Seismic Loading

2019 ◽  
Vol 12 (1) ◽  
pp. 336
Author(s):  
Jinsong Gan ◽  
Peizhen Li ◽  
Qiang Liu
Keyword(s):  
Soil Structure ◽  
Structural Characteristics ◽  
Tall Buildings ◽  
Dynamic Structure ◽  
Soil Structure Interaction ◽  
Soil Behavior ◽  
Earthquake Excitation ◽  
Skeleton Curve ◽  
Structure Interaction ◽  
Adjacent Structures

The dynamic structure-soil-structure interaction (SSSI) involving three adjacent structures with pile-raft foundations arranged along the east-west direction in a viscoelastic half-space is numerically studied under earthquake excitation. The direction of earthquake excitation is perpendicular to the direction of the structural arrangement. In the simulation, the Davidenkov model of the soil skeleton curve is assumed for soil behavior, and the viscous-spring artificial boundary is adopted. In order to investigate the effects of SSSI, the clear distance between structures, structure types, structure heights, and the first natural periods of structures are considered, and a series of numerical simulations are conducted. The peak floor displacement and the peak inter-story shear force of structures are examined to determine the SSSI effects. Results show that SSSI effects change significantly with these factors. Furthermore, the structural seismic response could be increased or reduced as a result of SSSI, depending mainly on the structural characteristics, rather than the location of the structures. These results are significant for studying the effects of SSSI and the sustainable development of cities, especially for the seismic design of dense urban buildings.

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