Ebrahim Afsar Dizaj

Ebrahim Afsar Dizaj
Azarbaijan Shahid Madani University · Department of Civil Engineering

Doctor of Philosophy

About

29
Publications
18,760
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
412
Citations
Citations since 2017
23 Research Items
407 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
I am an Assistant Professor of Structural Engineering within the Faculty of Engineering at the Azarbaijan Shahid Madani University, Tabriz, Iran. Further Information is available @ http://cv.azaruniv.ac.ir/afsar/en.

Publications

Publications (29)
Chapter
Full-text available
The study presented herein aims to comprehensively investigate the structural performance of the cable-cylinder bracing system as a promising alternative to the conventional X cable bracing system. To this end, the theoretical background of this system and its governing equilibrium relationships are presented. Subsequently, the effect of cylinder d...
Article
Full-text available
This paper investigates the seismic performance and vulnerability of multi-span Reinforced Concrete (RC) bridges with unequal height piers exposed to varied corrosion damage scenarios. An advanced three-dimensional nonlinear finite element modelling technique is developed and verified with available experimental results of a reference shake table t...
Article
Full-text available
This paper investigates the nonlinear dynamic behaviour and failure probability of multi-span Reinforced Concrete (RC) bridges supported on piers of unequal heights. To this end, a three-dimensional nonlinear finite element model of RC bridges with substructure irregularity is developed. The model is verified against an available experimental data...
Article
Full-text available
Two identical reinforced concrete (RC) bridge piers including a rectangular and a circular section are considered. The influence of corrosion damage, non-stationary characteristics of ground motions, and cross-sectional shape on nonlinear dynamic behaviour, failure mechanism and failure probability of these piers is investigated. An advanced modell...
Article
Full-text available
Different methodologies have been suggested in the literature to simulate the adverse impact of reinforcement corrosion on the non-linear structural behaviour of deteriorated reinforced concrete (RC) structures. The modelling methodology used, however, can significantly bias the predicted time-dependent structural behaviour of deteriorated structur...
Conference Paper
Full-text available
This paper presents the result of an investigation on the dynamic performance of Reinforced Concrete (RC) columns considering unidirectional and bidirectional excitations. For this purpose, an advanced nonlinear finite element method implementing the fibre beam-column model is used. Hypothetical rectangular and circular columns are considered to in...
Article
Full-text available
The deterioration and cracking of reinforced concrete (RC) bridges due to the chloride-induced corrosion of steel reinforcement is an inherently time-dependent stochastic phenomenon. In the current practice of bridge management systems, however, the determination of the condition states of deteriorated bridges is highly dependent on the opinion of...
Article
Full-text available
The current paper provides modelling guidelines for nonlinear analysis and fragility assessment of corrosion-damaged reinforced concrete (RC) structures. A systematic guideline is proposed to model the adverse impact of corrosion on mechanical properties of steel and concrete materials including the negative impact of corrosion on inelastic bucklin...
Article
Full-text available
Ageing structures located in moderate to high seismicity regions are exposed to multiple natural stressors during their lifetime. Large earthquake events coupled with environmental aggressive agents increase the progressive failure probability of these structures. The accumulated damage during the main earthquake event might be exacerbated by its f...
Article
Full-text available
This paper presents a numerical investigation on seismic performance of reinforced concrete (RC) cantilever columns under unidirectional and bidirectional excitations. The influence of cross-sectional geometry and multiple excitations have been examined in this study. An advanced nonlinear finite element model is employed to model different failure...
Article
Full-text available
The study presented in this paper describes the coupled influence of corrosion and cross-sectional shape on failure mechanism of reinforced concrete (RC) bridge piers subject to static and dynamic earthquake loading. To this end, two RC columns varied in cross-sectional shape and corrosion degree are considered. An advanced nonlinear finite element...
Article
Full-text available
The aim of this study is to investigate the dynamic performance of rectangular and circular reinforced concrete (RC) columns considering biaxial multiple excitation. For this purpose, an advanced nonlinear finite element model which can simulate various features of cyclic degradation in material and structural components is used. The implemented no...
Article
Full-text available
The current paper provides a comprehensive review of experimental studies on corrosion-damaged reinforced concrete (RC) components and the ability of current state-of-the-art numerical models to predict the residual capacity of these corroded RC components. The experimental studies on corroded RC components are classified into five different catego...
Article
Full-text available
The current paper provides a comprehensive review of experimental studies on corrosion damaged reinforced concrete (RC) components, and the ability of current state-of-the-art numerical models to predict the residual capacity of these corroded RC components. The experimental studies on corroded RC components are classified into five different categ...
Article
Full-text available
Seismic isolation is an effective approach used in controlling the seismic responses and retrofitting of structures. The construction and installation of such systems are expanded nowadays due to modern improvements in technology. In this research, the seismic performance of steel moment resisting frames isolated by Lead Rubber Bearing (LRB) is ass...
Article
Full-text available
A probabilistic framework for seismic vulnerability analysis of corroded Reinforced Concrete (RC) frame structures is developed. An advanced nonlinear finite element modelling technique is used to accurately simulate the nonlinear behaviour of prototype corroded RC frames over their service life. Different sources of uncertainties including modelli...
Conference Paper
Full-text available
The aim of this study is to investigate the effects of corrosion on seismic residual capacity and failure mode of corroded structures. For this purpose, firstly a nonlinear finite element (NFEM) model including the impact of corrosion on low-cycle fatigue and inelastic buckling is proposed and validated against experimental data. Then, the verified...
Article
Full-text available
A nonlinear finite element (FE) framework for time-dependent capacity assessment of corroded rectangular RC columns is developed. The proposed nonlinear FE model includes the impact of corrosion on inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement. The proposed nonlinear FE model is validated against a set of experi...
Article
Full-text available
Buckling-restrained braces have adequate seismic performance characteristics such as high energy absorption due to their symmetric behaviour in compression and tension. However, low post-yield stiffness is one of the main disadvantages of these braces. The stiffness values of buckling-restrained brace frames can highly degrade when the core segment...
Conference Paper
Full-text available
Cold-formed steel (CFS) structures or light weight steel frame (LSF) structures have been frequently used in recent years due to their fast constructions as well as consumed light weight steels. CFS structures are constructed with light thin cold formed steel members. Lateral loading systems of these structures are often steel or wooden shear walls...
Article
Full-text available
Cable–cylinder bracing (cable bracing system with central cylinder) is one of the modern bracing systems in which a pair of cables passes through a cylinder at their point of intersection. This research focuses on the seismic behaviour of moment-resisting frames which have been strengthened using cable–cylinder bracing. For this purpose, steel mome...
Article
Full-text available
Different kinds of bracing systems are used as the basic methods for providing lateral stiffness and strength in building frames. In recent years, tension-only bracing systems have been suggested by researchers. Steel cable has been recognized as a flexible member which can tolerate tensional forces only. Using the tension-only members as bracing f...
Article
Full-text available
In this paper, overstrength, ductility and response modification factors are calculated for frames braced with a different type of buckling restrained braces, called reduced yielding segment BRB (Buckling Restrained Brace) in which the length of its yielding part is reduced and placed in one end of the brace element in comparison with conventional...

Network

Cited By