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Dr Alireza Ahangar Asr's Outputs (39)

Lateral load bearing capacity model for piles in cohesive soils (2014)
Book Chapter
Ahangar Asr, A., Javadi, A., Johari, A., & Chen, Y. (2014). Lateral load bearing capacity model for piles in cohesive soils. In A. Javadi, & M. Hussain (Eds.), Proceedings of the 22nd UK National Conference of the Association for Computational Mechanics in Engineering (264-267). University of Exeter

In this research work an evolutionary approach is proposed to develop a structured polynomial model for predicting the lateral load bearing capacity of piles in undrained conditions. The proposed polynomial regression technique is an evolutionary dat... Read More about Lateral load bearing capacity model for piles in cohesive soils.

Identification of coupling parameters between shear strength behaviour of compacted soils and chemical's effects with an evolutionary-based data mining technique (2012)
Journal Article
Cuisinier, O., Javadi, A. A., Ahangar-Asr, A., & Masrouri, F. (2013). Identification of coupling parameters between shear strength behaviour of compacted soils and chemical's effects with an evolutionary-based data mining technique. Computers and Geotechnics, 48, 107-116. https://doi.org/10.1016/j.compgeo.2012.10.005

When subjected to a very high-pH, most of the soil minerals undergo physico-chemical transformation. This could induce strong modifications of the shear strength behaviour of the soil. This issue is of high interest in the framework of the design of... Read More about Identification of coupling parameters between shear strength behaviour of compacted soils and chemical's effects with an evolutionary-based data mining technique.

Numerical implementation of EPR-based material models in finite element analysis (2012)
Journal Article
Faramarzi, A., Javadi, A. A., & Ahangar-Asr, A. (2013). Numerical implementation of EPR-based material models in finite element analysis. Computers and Structures, 118, 100-108. https://doi.org/10.1016/j.compstruc.2012.10.002

In this paper a novel approach based on evolutionary polynomial regression (EPR) is presented to develop constitutive models of materials. Stress–strain data are used to train EPR and develop EPR-based material models. It is shown that it is possible... Read More about Numerical implementation of EPR-based material models in finite element analysis.

Analysis of behaviour of soils under cyclic loading using EPR-based finite element method (2012)
Journal Article
Javadi, A. A., Faramarzi, A., & Ahangar-Asr, A. (2012). Analysis of behaviour of soils under cyclic loading using EPR-based finite element method. Finite Elements in Analysis and Design, 58, 53-65. https://doi.org/10.1016/j.finel.2012.04.005

In this paper, a new approach is presented for modelling of behaviour of soils in finite element analysis under cyclic loading. This involves development of a unified approach to modelling of complex materials using evolutionary polynomial regression... Read More about Analysis of behaviour of soils under cyclic loading using EPR-based finite element method.

Modelling stress-strain and volume change behaviour of unsaturated soils using an evolutionary based data mining technique, an incremental approach (2012)
Journal Article
Javadi, A., Ahangar-Asr, A., Johari, A., Faramarzi, A., & Toll, D. (2012). Modelling stress-strain and volume change behaviour of unsaturated soils using an evolutionary based data mining technique, an incremental approach. Engineering Applications of Artificial Intelligence, 25(5), 926-933. https://doi.org/10.1016/j.engappai.2012.03.006

Modelling of unsaturated soils has been the subject of many research works in the past few decades. A number of constitutive models have been developed to describe the complex behaviour of unsaturated soils. However, many have proven to be unable to... Read More about Modelling stress-strain and volume change behaviour of unsaturated soils using an evolutionary based data mining technique, an incremental approach.

Determination of the most probable slip surface in 3D slopes considering the effect of earthquake force direction (2012)
Journal Article
Ahangar-Asr, A., Toufigh, M., & Salajegheh, A. (2012). Determination of the most probable slip surface in 3D slopes considering the effect of earthquake force direction. Computers and Geosciences, 45, 119-130. https://doi.org/10.1016/j.cageo.2011.10.024

Considering the effect of earthquake forces on stability of slopes has always been of crucial importance in seismic analysis of geotechnical structures like dams, roads and embankments and there has been much concern about stability of cuts, fills an... Read More about Determination of the most probable slip surface in 3D slopes considering the effect of earthquake force direction.

An evolutionary approach to modelling the soil-water characteristic curve in unsaturated soils (2012)
Journal Article
Ahangar-Asr, A., Johari, A., & Javadi, A. (2012). An evolutionary approach to modelling the soil-water characteristic curve in unsaturated soils. Computers and Geosciences, 43, 25-33. https://doi.org/10.1016/j.cageo.2012.02.021

In this paper a new approach is presented based on evolutionary polynomial regression (EPR) for modelling of soil–water characteristic curve in unsaturated soils. EPR is an evolutionary data mining technique that generates a transparent and structure... Read More about An evolutionary approach to modelling the soil-water characteristic curve in unsaturated soils.

Modeling of permeability and compaction characteristics of soils using evolutionary polynomial regression (2011)
Journal Article
Ahangar-Asr, A., Faramarzi, A., Mottaghifard, N., & Javadi, A. (2011). Modeling of permeability and compaction characteristics of soils using evolutionary polynomial regression. Computers and Geosciences, 37(11), 1860-1869. https://doi.org/10.1016/j.cageo.2011.04.015

This paper presents a new approach, based on evolutionary polynomial regression (EPR), for prediction of permeability (K), maximum dry density (MDD), and optimum moisture content (OMC) as functions of some physical properties of soil. EPR is a data-d... Read More about Modeling of permeability and compaction characteristics of soils using evolutionary polynomial regression.

Modelling mechanical behaviour of rubber concrete using evolutionary polynomial regression (2011)
Journal Article
Ahangar‐Asr, A., Faramarzi, A., Javadi, A. A., & Giustolisi, O. (2011). Modelling mechanical behaviour of rubber concrete using evolutionary polynomial regression. Engineering Computations, 28(4), 492-507. https://doi.org/10.1108/02644401111131902

Using discarded tyre rubber as concrete aggregate is an effective solution to the environmental problems associated with disposal of this waste material. However, adding rubber as aggregate in concrete mixture changes, the mechanical properties of co... Read More about Modelling mechanical behaviour of rubber concrete using evolutionary polynomial regression.

A new approach for prediction of the stability of soil and rock slopes (2010)
Journal Article
Ahangar‐Asr, A., Faramarzi, A., & Javadi, A. A. (2010). A new approach for prediction of the stability of soil and rock slopes. Engineering Computations, 27(7), 878-893. https://doi.org/10.1108/02644401011073700

Purpose
Analysis of stability of slopes has been the subject of many research works in the past decades. Prediction of stability of slopes is of great importance in many civil engineering structures including earth dams, retaining walls and trenches... Read More about A new approach for prediction of the stability of soil and rock slopes.

Relationship between shallow foundation shape and contact area, and the settlement in granular soils
Presentation / Conference
Starkey, T., & Ahangar Asr, A. Relationship between shallow foundation shape and contact area, and the settlement in granular soils. Presented at UK Association for Computational Mechanics (UKACM) Conference 2021, Loughborough University, UK

The aim of this investigation is to discover the effects of foundation shape and contact area on foundation settlement. There is little research at the current time which relates the increase in size or scale effects to the settlement, with current r... Read More about Relationship between shallow foundation shape and contact area, and the settlement in granular soils.

A comparative analysis of the stability of homogeneous and non- homogeneous soil slopes subject to various surcharge loading conditions
Presentation / Conference
conditions. Presented at UK Association for Computational Mechanics (UKACM) Conference 2021, Loughborough University, UK

Slope stability is a topic of great importance within the scope of civil engineering, this study investigates the differences between homogeneous and non-homogenous soil slopes when various surcharge loading conditions are applied. To analyze slope s... Read More about A comparative analysis of the stability of homogeneous and non- homogeneous soil slopes subject to various surcharge loading conditions.

Effects of air permeability and perimeter area on air losses in compressed air tunnelling
Presentation / Conference
Ahangar Asr, A., & Javadi, A. Effects of air permeability and perimeter area on air losses in compressed air tunnelling. Presented at 23rd UK Conference of the Association for Computational Mechanics in Engineering, Swansea, UK

Field measurement data obtained from a tunnel in Munich was used to develop a model to predict air losses in the process of compressed air tunnelling. In the implemented case study, compressed air was used to control the groundwater followed by placi... Read More about Effects of air permeability and perimeter area on air losses in compressed air tunnelling.

Stability analysis of geometrically non-homogeneous stratified slopes
Presentation / Conference
Sauffisseau, R., & Ahangar Asr, A. Stability analysis of geometrically non-homogeneous stratified slopes. Presented at 25th UKACM Conference on Computational Mechanics, University of Birmingham, Birmingham, United Kingdom

Due to ongoing construction of cities and development of new buildings and infrastructures, many natural slopes in and around urban areas are often subjected to cuts. These excavations result in dramatic changes in the geometry of slope faces mostly... Read More about Stability analysis of geometrically non-homogeneous stratified slopes.

The effect of cut-off wall angle on seepage and uplift pressure under dams
Presentation / Conference
dams. Presented at UK Association for Computational Mechanics (UKACM) Conference 2021, Loughborough University, UK

Seepage under dams can result in high uplift pressure experienced usually under the downstream of the dam which may lead to instability and potentially the failure of the dam. Cut-off walls are the primary solution to minimize the effects caused by t... Read More about The effect of cut-off wall angle on seepage and uplift pressure under dams.

Numerical investigation into the effect of cavity size and location on stability of earth dams
Presentation / Conference
Alateya, H., & Ahangar Asr, A. Numerical investigation into the effect of cavity size and location on stability of earth dams. Presented at 25th UKACM Conference on Computational Mechanics, University of Birmingham, Birmingham, United Kingdom

Numerical investigations performed to study the effect of the presence of cavities on stability of slopes considering rapid draw down conditions. The aim of the investigation is was to study the influence of different factors (such as diameter and lo... Read More about Numerical investigation into the effect of cavity size and location on stability of earth dams.

Numerical investigation into the effect of various surcharge loadings on propped wall excavations and embankments
Presentation / Conference
Ogunyemi, O., & Ahangar Asr, A. Numerical investigation into the effect of various surcharge loadings on propped wall excavations and embankments. Presented at UK Association for Computational Mechanics 2020, Loughborough University

Several guidance and formulation have been developed in the literature to account for the analysis of external surcharges adjacent to a propped excavation but less attention has been paid to the presence of sloping ground or embankments. However, CIR... Read More about Numerical investigation into the effect of various surcharge loadings on propped wall excavations and embankments.

Effects of various surcharge loading conditions on the stability of soil slopes
Presentation / Conference
Leeworthy, T., & Ahangar Asr, A. Effects of various surcharge loading conditions on the stability of soil slopes. Presented at UK Association for Computational Mechanics 2020, Loughborough University

The stability of soil slopes is a theme which has great significance within the field of civil engineering, this paper will focus on the analysis of soil slopes under varying surcharge loads. There are two main methods used in the analysis of soil sl... Read More about Effects of various surcharge loading conditions on the stability of soil slopes.