The pattern of distribution of vertical stress of swelling of soil under foundations and underground structures

2016 ◽  
Vol 4 (3) ◽  
pp. 60-67
Author(s):  
Раис Абжалимов ◽  
Rais Abzhalimov
Keyword(s):  
Strain State ◽  
Vertical Stress ◽  
Strip Foundation ◽  
Underground Structures ◽  
Foundation Soil ◽  
Swelling Soils ◽  
Swelling Soil ◽  
Soil Foundation ◽  
Foundation Structure ◽  
Selection Of

Examines the pattern of distribution of vertical stress of swelling of soil under foundations and underground structures, stress-strain state (VAT) system, "swelling soil-Foundation - structure" for the strip Foundation and VAT for a square Foundation when uneven wetting of the Foundation soil. Provides recommendations for selection of type of foundations on swelling soils.

Beam-on-Nonlinear-Winkler-Foundation Modeling of Shallow, Rocking-Dominated Footings

2009 ◽  
Vol 25 (2) ◽  
pp. 277-300 ◽  
Author(s):  
Chad W. Harden ◽  
Tara C. Hutchinson
Keyword(s):  
Earthquake Engineering ◽  
Energy Content ◽  
Nonlinear Behavior ◽  
Seismic Energy ◽  
Shallow Foundation ◽  
Winkler Foundation ◽  
Soil Foundation ◽  
Performance Based Earthquake Engineering ◽  
Foundation Structure ◽  
Selection Of

The nonlinear behavior of shallow foundations under large amplitude earthquake-induced loading can result in dissipation of seismic energy through the mechanism of soil yielding beneath the foundation. In addition, foundation uplifting may shift the period of the soil-foundation-structure system away from the damaging energy content of most earthquakes. However, this yielding and uplifting may lead to excessive transient and permanent deformations (settlement, rocking, and sliding). Therefore, modeling procedures that account for foundation nonlinearity and uplift are needed before these benefits can be realized in performance based earthquake engineering (PBEE) practice. This paper adopts a beam-on-nonlinear-Winkler-foundation (BNWF) simulation methodology for modeling shallow foundation-structure systems, where seismically-induced rocking plays a predominant role in their response. Numerical results demonstrate that reasonable comparison between the nonlinear Winkler-based approach, and experimental response in terms of moment-rotation, settlement-rotation, and shear-sliding displacement can be obtained, given an appropriate selection of model and soil properties.

scholarly journals THE ANALYSIS OF THE STRESS-STRAIN STATE OF THE SYSTEM «BASEMENT - PILE FOUNDATION – STRUCTURE» CONSIDERING SWELLING PROPERTIES OF SOILS

2017 ◽  
Vol 2 (49) ◽  
pp. 54-60
Author(s):  
I. V. Khrapatova ◽  
O. V. Krotov
Keyword(s):  
Plane Problem ◽  
Deformation Characteristics ◽  
Calculation Algorithm ◽  
Swelling Properties ◽  
Factors Affecting ◽  
Swelling Soils ◽  
Swelling Soil ◽  
Additional Influence ◽  
Orthotropic Properties ◽  
Foundation Structure

This work analyzes factors affecting swelling soils and presents a calculation algorithm of structure on swelling soils base for the plane problem. In this work an analysis of the factors influencing the swelling of soils is made, the algorithm for calculating the structure with the base with swellable soils for a plane problem is given. At the same time, the swelling process is considered as an additional influence, close in nature to temperature, and the swelling soil is considered a material having orthotropic properties. The value of the relative swelling depends on the level of the stress state, while the value of the main stresses is compared with the magnitude of the pressure of swelling. Therefore, to determine the deformation characteristics of the swelling soil, several variants of the stressed state of the soil have to be considered. The effectiveness of the obtained solution has been verified according to the example for pile foundations.

Stability Analysis of Gravity Dam on Soil Foundation

2014 ◽  
Vol 501-504 ◽  
pp. 79-82
Author(s):  
Li Hua Zhang ◽  
Li Xin Zhang ◽  
Su Zhen Cheng
Keyword(s):  
Stability Analysis ◽  
Gravity Dam ◽  
Soil Pressure ◽  
Sliding Stability ◽  
Water Conservancy Project ◽  
Water Conservancy ◽  
Soil Foundation ◽  
Deep Stratum ◽  
Selection Of

For small and medium sized water conservancy project, gravity dam on soil foundation is a comparatively economic and reasonable dam structure. Based on project case, the author discusses in this paper the seepage-proofing and anti-sliding stability of the gravity dam on soil foundation, focusing on calculation of anti-sliding stability of deep stratum, selection of soil pressure and effective measures for improving the anti-sliding stability of the gravity dam on soil foundation.

Application and Validation of Practical Tools for Nonlinear Soil-Foundation Interaction Analysis

2010 ◽  
Vol 26 (1) ◽  
pp. 111-129 ◽  
Author(s):  
Sivapalan Gajan ◽  
Prishati Raychowdhury ◽  
Tara C. Hutchinson ◽  
Bruce L. Kutter ◽  
Jonathan P. Stewart
Keyword(s):  
Interaction Analysis ◽  
Model Performance ◽  
Shallow Foundations ◽  
Winkler Foundation ◽  
Gap Formation ◽  
Foundation Soil ◽  
Lateral Connection ◽  
Practical Guidelines ◽  
Soil Foundation ◽  
The Moment

Practical guidelines for characterization of soil-structure interaction (SSI) effects for shallow foundations are typically based on representing foundation-soil interaction in terms of viscoelastic impedance functions that describe stiffness and damping characteristics. Relatively advanced tools can describe nonlinear soil-foundation behavior, including temporary gap formation, foundation settlement and sliding, and hysteretic energy dissipation. We review two tools that describe such effects for shallow foundations and that are implemented in the computational platform OpenSees: a beam-on-nonlinear-Winkler foundation (BNWF) model and a contact interface model (CIM). We review input parameters and recommend parameter selection protocols. Model performance with the recommended protocols is evaluated through model-to-model comparisons for a hypothetical shear wall building resting on clay and model-data comparisons for several centrifuge test specimens on sand. The models describe generally consistent moment-rotation behavior, although shear-sliding and settlement behaviors deviate depending on the degree of foundation uplift. Pronounced uplift couples the moment and shear responses, often resulting in significant shear sliding and settlements. Such effects can be mitigated through the lateral connection of foundation elements with tie beams.

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