Majid Movahedi Rad

Majid Movahedi Rad
Széchenyi István University, Gyor · Department of Structural and Geotechnical Engineering

PhD. habil

About

61
Publications
9,043
Reads
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224
Citations
Citations since 2016
45 Research Items
163 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Additional affiliations
September 2012 - present
Széchenyi István University, Gyor
Position
  • Professor (Assistant)
September 2007 - December 2011
Budapest University of Technology and Economics
Position
  • PhD Student
Description
  • The thesis: Extended Optimization Methods in Structural Plasticity with Uncertainties.
Education
September 2007 - October 2011
Budapest University of Technology and Economics
Field of study
  • Reliability based design optimization of structures

Publications

Publications (61)
Article
Full-text available
Although a sleeper makes a great contribution to the lateral resistance of ballasted tracks, in this regard, limited studies have been carried out on the effect of its contact surface with ballast aggregates. The current paper is dedicated to evaluating the effect of sleeper shape on the lateral resistance of ballasted track through discrete elemen...
Article
Full-text available
Waste rubber tires and glass powders, are hazardous materials for the environment. One of the methods to consume them, is their application in railway engineering projects. Rubber and glass materials, in this research, are provided from waste tires and glass bottles. Therefore, a modification is conducted to the concrete railway sleeper mix design,...
Article
Full-text available
The current paper aims to investigate stability of side's slops of geocell-reinforced railway embankments. For this purpose, firstly a set of six 1:20 scaled models including a reference embankment and geocell-reinforced embankments was constructed in a loading chamber and their load-settlement behaviour was assessed. In the next stage, 3D FEM mode...
Article
Full-text available
Angled guide plates are used to transmit the forces induced by trains, from the rail seat, to the concrete sleepers. Additionally, the design of the angled guide plates, with an appropriate width, supports tilting protection. Considering the updated requirements of the ML-1 railway line, in the Islamic Republic of Pakistan, an optimization design o...
Article
Full-text available
Most existed researches consider deterministic numerical analysis when dealing with structural models. However, the test results reveal that uncertainties are existing in most cases regarding some considerations such as material randomness and the lack of experience. Therefore, proposing a probabilistic design models have got attention of researche...
Article
Full-text available
Wheel ground borne vibrations, may have a significant impact on human activity and on nearby buildings. In metropolitan cities, metro lines and their development may cause such vibrations. Despite many works and solutions for path and receiver, the excitation source could also have a great effect. Wheel and rail damages are the two sources of vibra...
Article
Full-text available
Sand dune accumulation in the railways passing through desert areas leads to ballast softening and settlement, which is one of the major challenges in the ballast maintenance operation. In this regard, ballast infilling with polyurethane could be mentioned as a novel solution that has been less attentional in previous studies. In this matter, in pr...
Article
In this paper, a novel computational (optimization) model is presented to control the plastic behaviour of reinforced concrete haunched beams using complementary strain energy of residual forces formed inside the steel reinforcing bars. For this purpose, a numerical model validation process was held and then two non-linear optimization problems wer...
Article
Full-text available
In nature, the mechanical properties of soils, vary from region to region and in some areas, high-strength soil resources lack is a serious difficulty that geotechnical engineers may face where constructing earthworks such as railway and road embankments is required. Although a wide range of soil improvement techniques exists to improve such soils,...
Article
Full-text available
The aim of this paper is to integrate the reliability-based analysis into topology optimization problems. Consequently, reliability-based topology optimization (RBTO) of geometrically nonlinear elasto-plastic models is presented. For purpose of performing (RBTO), the volume fraction is considered reliable since that the application of (RBTO) gives...
Article
The aim of this paper is to integrate the reliability‐based analysis into topology optimization problems. Consequently, reliability‐based topology optimization (RBTO) of geometrically nonlinear elasto‐plastic models is presented. For purpose of performing (RBTO), the volume fraction is considered reliable since that the application of (RBTO) gives...
Article
Full-text available
This paper summarizes the results of laboratory tests in which the authors investigated the effects of extremely high vertical load to a railway track segment. The segment consisted of a cut concrete sleeper (contact area: 290×390 mm) with a pair of direct-elastic rail fasteners; the sleeper pieces had a standard, full height; the structure had a t...
Article
Full-text available
Concrete railway sleepers have been used for years without an update in production and design, to be compatible with demands for increasing train axle loads and speed. In the current research, concrete railway admixture is modified with consuming (0.5% straight-1.5% hooked), (1.5% straight-0.5% hooked) and (1% straight-1% hooked) steel fibers combi...
Article
Full-text available
In this work, considering the MÁV’s (i.e., the Hungarian Railways) five small and five high-traffic railway lines, the statistical distribution and change of the track gauge parameter were analyzed, under a ten year, on time-series analysis, related to straight track sections. The analysed data, were bottom track gauge measurements, of the FMK-004...
Article
Full-text available
The Concrete Canvas (CC) material, is a promising material for application in many civil engineering fields, such as, water construction, pipelining, slope protection, military applications, etc. The authors believe that this material has more potential and could be helpful in infrastructure applications. The infrastructure design requirements are...
Article
Concrete railway sleepers have been used for years without an update in production and design, to be compatible with demands for increasing train axle loads and speed. In the current research, concrete railway admixture is modified with consuming (0.5% straight-1.5% hooked), (1.5% straight-0.5% hooked) and (1% straight-1% hooked) steel fibers combi...
Article
Full-text available
This paper presents elasto-plastic limit analysis of reliability-based geometrically nonlinear topology optimization. For this purpose, by reason of uncertainties the volume fraction is considered randomly during optimization. Thus reliability-based design has been considered for solving the problems. To perform reliability-based topology optimizat...
Conference Paper
In railway tracks, using elastic elements is one of the most efficient methods for establishing and changing vertical stiffness, reducing noise and vibration, and consequently decreasing maintenance costs. In this regard, using under-sleeper pads made of Polyurethane, rubber, or Ethylene-vinyl is a practical element. These elements can be used unde...
Article
Structural models and parameters are usually considered deterministic in most studies. However, test results revealed that uncertainties exist in most of these cases due to natural variability or lack of awareness. Therefore, uncertainty in structures is taking huge attention as it has an important role in the structures analysis and the calibratio...
Article
Full-text available
In this paper, numerical computations using PLAXIS 2D and 3D have been conducted to optimize a row of piles in cohesive-frictional slope stabilization. First, 2D parametric studies were performed to identify both the optimal location and length of the pile as well as the effect of pile head conditions. Next, more rigorous parametric studies taking...
Article
Vibration monitoring has become important in railway tracks for many purposes. One of the most important purposes is to prevent exceeding limits of induced vibration to adjacent residential buildings. In the current study, to measure the level of vibration, a field investigation is carried at three critical positions including a curve, a fishplate...
Article
Full-text available
Timber is among the most important construction materials with unique characteristics in comparison with other materials for instance steel and concrete. It is one of the first sustainable materials and continues to be a favoured selection in the current infrastructure. In the last decade, to refine the mechanical properties of timber, structural e...
Article
Since loose and salty subgrades consider as problematic barriers while constructing new transportation infrastructures such as railway tracks and roads are required, the current study aims to find a solution to stabilize these kinds of subgrades using the deep soil mixing (DSM) technique and micro silica additive. In the present study, a series of...
Article
Full-text available
This paper deals with the effect of contact conditions on the crushing mechanisms and the strength of granular materials. The computation of crushable grain material under different loading conditions is performed using 3D model of discrete element method (DEM). The crushable macro-grain is generated from a large number of identical spherical micro...
Article
In this research, in order to evaluate the plastic limit load and also plastic design parameters of the long pile foundations subjected to horizontal loads, shakedown method is applied. In carrying out shakedown analysis and design methods, large plastic deformations and residual displacements could develop in the pile foundation which might lead t...
Conference Paper
Full-text available
The non-prismatic reinforced concrete (RC) beam considered a unique case in structural engineering as it has variable depth all over beam section and it doesn't have sufficient information in structural codes, this can put structural engineers in a challenge to predict how this beam will react under specific types of loads or with different geometr...
Chapter
Full-text available
Numerical models for the simulation of the micro-mechanical behaviour of granular assemblies have a wide range of applications, for instance in material science, process engineering, environmental engineering, railway engineering and geotechnical engineering (in this study we examined one macro-grain but what important is behaviour of granular asse...
Article
Full-text available
In this study optimum plastic shakedown analysis of framed steel structures with semi-rigid connections (SRC) between beam and columns subjected to multi-parameter static loading presented. Since shakedown analysis does not provide information concerned with the accumulated residual displacements, complementary strain energy of the residual force (...
Article
Full-text available
This paper is the continuation of the previous article published in Sínek Világa 2019/5, the title of this article is „Measurement of degradation of railway ballast particles in laboratory conditions” [1]. Here the authors presented their latest measurement results and a new researching line involving CT scans. Among other things, the article raise...
Article
Full-text available
Purpose. It is a very important issue to be able to determine the accurate particle degradation of railway ballast material. There are three different – but connecting – methodology for that: 1) full scale field tests, 2) full scale or reduced scale laboratory tests, 3) computer modelling, mainly with discrete element method (DEM). Options no. 1 an...
Article
Full-text available
Grain crushing is of essential importance for understanding the mechanical behavior of granular materials such as sand, gravel or broken rock under higher pressures. In order to investigate the breakage mechanism of a single grain under different loading conditions, numerical simulations are carried out using DEM. Two different types of boundary co...
Conference Paper
In this study optimum plastic shakedown analysis of framed steel structures with semirigid connections (SRC) between beam and columns subjected to multi-parameter static loading presented. Since shakedown analysis does not provide information concerned with the accumulated residual displacements, complementary strain energy of the residual force (C...
Article
Full-text available
A simple beam element‐based modelling technique has been developed to allow the analytic definition of a stiffness matrix to describe the behavior of corner region between two doubly symmetric thin‐walled I beams connected through moment connection. The stiffness matrix describes the relation between „out‐of‐plane” type deformations of connected be...
Article
Full-text available
This article extends the innovative Overall Stability Design Method (OSDM) for steel portal frames with double symmetric I and H cross‐sections. The OSDM utilizes linear buckling analysis and equivalent initial geometrical imperfection in the shape of buckling mode for the assessment of out‐of‐plane buckling resistance. The method was developed for...
Conference Paper
Full-text available
This article extends the innovative Overall Stability Design Method (OSDM) for steel portal frames with double symmetric I and H cross-sections. The OSDM utilizes linear buckling analysis and equivalent initial geometrical imperfection in the shape of buckling mode for the assessment of out-of-plane buckling resistance. The method was developed for...
Conference Paper
Full-text available
A simple beam element-based modelling technique has been developed to allow the analytic definition of a stiffness matrix to describe the behavior of corner region between two doubly symmetric thin-walled I beams connected through moment connection. The stiffness matrix describes the relation between "out-of-plane" type deformations of connected be...
Conference Paper
Full-text available
A simple beam element based modelling technique has been developed which makes possible to analyze frames made of I sections with column-rafter bolted end-plate connections, subject to 3D loads, compatible with the thin walled beam theory with 7DOF beam elements. The model previously developed by the same team for welded connections has been extend...
Conference Paper
Full-text available
A general method to restrain the plastic deformations of a vertical long pile in cohesionless soil when subjected to cyclic lateral loading is introduced. For this purpose shakedown theorem is developed and applied to the structure. One of the main requirement of the elasic-plastic analyses and design processes is take into consideration the plasti...
Article
Full-text available
With applying plastic analysis and design methods, significant saving in material can be obtained. However, as a result of this benefit excessive plastic deformations and large residual displacements might develop, which in turn might lead to unserviceability and collapse of the structure. In this study, for deterministic problem the residual defor...
Article
Full-text available
In classical plasticity the shakedown analysis is among the most important basic problems. The principles of shakedown analysis are counterparts to those of limit analysis in the sense that they provide static and kinematic approaches to the question of whether or not shakedown will occur for a body under multiple variable loading conditions. The p...
Article
Full-text available
In this study reliability based limit analysis is used to determine the ultimate capacity of laterally loaded piles. The aim of this study is to evaluate the lateral load capacity of free-head and fixed-head long pile when plastic limit analysis is considered. In addition to the plastic limit analysis to control the plastic behaviour of the structu...
Article
Full-text available
At the application of the plastic analysis and design methods the control of the plastic behaviour of the structures is an important requirement. Since the plastic limit analysis provides no information about the magnitude of the plastic deformations and residual displacements accumulated before the adaptation of the structure, therefore complement...
Article
Full-text available
This paper includes description of reliability based design optimization of elasto-plastic skeletal structures under multi-parameter static loading. Presented approach is based on the assumption that the complementary strain energy of the residual forces is considered as an overall measure of the plastic performance for plastic shakedown analysis a...
Article
Full-text available
The aim of this paper is to create new type of plastic limit design procedures where the influence of the limited load carrying capacity of the beam-to-column connections of elasto-plastic steel (or composite) frames under multi-parameter static loading and probabilistically given conditions are taken into consideration. In addition to the plastic...
Article
Full-text available
The aim of this paper is to take into consideration the influence of the limited load carrying capacity of the connections on the plastic limit state of elasto-plastic steel (or composite) framed structures under multi-parameter stochastic loading and probabilistically given conditions. In addition to the plastic limit design to control the plastic...
Article
In the proposed probabilistic topology optimization method, the minimum penalized weight design of the structure is subjected to probabilistic compliance and side constraints. The calculation of the compliance value is based on the assumption that the magnitude of the loads has uncertainties so that their joint normal distribution functions, mean v...
Article
The main structural elements of steel framed multi–storey structures are the columns, the beams and their connectionsmagenta, which can be considered rigid, pinned or semi–rigid. The aim of this paper is to analyze the effect of the semi–rigid connections on the limit analysis of steel structures under multi–parameter static loading where to contro...
Chapter
The aim of this paper is to study the influence of the semi-rigid connections on the plastic behaviour of elasto-plastic steel frames subjected to dead load and quasi-static working loads. In the presented methods the static theorem of plastic limit analysis and the static theorem of shakedown analysis are applied and to control the plastic deforma...
Conference Paper
The aim of this paper is to analyze the influence of the limited load carrying capacity of the connections on the plastic limit state and shakedown of elasto-plastic steel (or composite) framed structures under multi-parameter static loading and probabilistically given residual energy condition. In addition to the limit analysis and shakedown, to c...

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Projects (2)
Project
The aim of this project is to analyze the influence of the limited load carrying capacity of the connections on the plastic limit state and shakedown of elasto-plastic steel (or composite) structures under multi-parameter static loading and probabilistically given residual energy condition.