Yasser Sharifi

• PhD
• Professor (Full) at Vali Asr University of Rafsanjan

Due to their advantageous mechanical and physical characteristics, fiber-reinforced polymer (FRP) bars have been used extensively in various structural elements in recent years. Numerous researchers examined the structural behaviour of such elements reinforced with FRP bars to forecast their capacity. Despite a large number of existing code provisi...

The aim of this study is to investigate the effects of high temperatures on cement mortars that incorporate various amounts of waste glass powder (WGP) as a cementitious material. WGP is used as a partial replacement for cement in mortars that are exposed to high temperatures. Cement mortar and paste tests were carried out following a 28-day water...

The popularity of fiber-reinforced polymer (FRP) bars as a structural element has soared due to their advantageous mechanical and physical properties. Despite an abundance of code requirements and heuristic equations, engineers specializing in structural retrofitting and analysis often struggle to utilize a suitable yet precise equation. This study...

The popularity of fiber-reinforced polymer (FRP) bars as a structural element has soared due to their advantageous mechanical and physical properties. Despite an abundance of code requirements and heuristic equations, engineers specializing in structural retrofitting and analysis often struggle to utilize a suitable yet precise equation. This study...

Although engineers working on structural retrofitting and analysis have access to numerous code provision equations for calculating shear strength in steel fiber-reinforced concrete (SFRC) beams, pinpointing an accurate and practical equation remains a challenge. This paper introduces a novel hybrid machine learning model, PSO-ANN, which combines t...

Despite the existence of numerous code requirements and heuristic equations concerning the shear capacity of slender beams reinforced with steel fiber without stirrup, engineers specializing in structural retrofitting and analysis frequently encounter difficulties in identifying a suitable equation. This paper presents a soft computing study design...

In this paper a set of practical graphs have been developed for static analysis of tall buildings that consist of framed tube, shear core, outrigger and belt truss system; as it is subjected to three types of loadings, concentrated load at the top as well as uniform and triangular distributed loadings along the height of the structure. The entire h...

Composite steel-concrete beams are presented as an interesting solution for covering long spans. These profiles are characterized by the existence of sequentially spaced openings along the beam web. A very common particular use of this type of structure is in continuous or semi-continuous floors, in which the existence of intermediate supports in t...

Lateral torsional buckling (LTB) is a common mode of failure in steel structures due to instability. However, current standard recommendations have limitations in accurately determining the ultimate capacity of members subjected to LTB. To address this issue, this paper presents an in-depth parametric study that uses the finite element method (FEM)...

Lateral torsional buckling (LTB) is a highly investigated failure mode of beams due to their instability. Despite many studies, existing standard recommendations still have limitations to determine the ultimate capacity of such members subjected to LTB mode. Accordingly, in the current paper, an in-depth parametric study has attempted to study the...

The study examines the impact of WGP on the resistance of mortar to sulfuric acid solution attack, with specimens containing 0%, 5%, 10%, 15%, 20%, 25%, and 30% WGP produced as cement substitutes. Some fundamental properties of mortar mixtures were evaluated, such as the pozzolanic activity index assessment, fresh density, water absorption, and com...

Despite numerous studies conducted on the potential of waste materials as cement substitutes, the resistance of mortars comprising such blended cementitious materials against acidic environments has seldom been investigated. This paper presents an investigation into the potential of waste glass powder (WGP) as a replacement for cement in enhancing...

Lateral torsional buckling (LTB) of steel I-beams is characterized by simultaneous lateral deflection and twist. LTB is an instability failure mode that has been intensively investigated. However, existing standard procedures and formulations still have limitations in determining the LTB ultimate moment, especially when considering the use of perfo...

The lateral-torsional buckling (LTB) strength of cellular steel girders that were subjected to web distortion was rarely examined. Since no formulation has been presented for predicting the capacity of such beams, in the current paper an extensive numerical investigation containing 660 specimens was modeled using finite element analysis (FEA) to co...

Lateral distortional buckling (LDB) mode has been investigated as one of the failure modes in steel I-beams. The LDB mode in such beams is known by simultaneous lateral deflection, twist, and cross-sectional change due to web distortion. However, many studies have been conducted to investigate the behavior of this failure mode; so far, no formula h...

Lateral distortional buckling (LDB) mode has been investigated as one of the failure modes in steel-concrete composite beams (SCCB). The LDB mode in such beams is known by lateral displacement accompanied by rotation of the compressed bottom flange that occurs due to the web distortion. However, many studies have been conducted to investigate the b...

In the current paper, using finite element models (FEM), an extensive numerical study is performed on the behaviour of the steel plates with a circular hole in their centre subjected to compressive axial loading. For this purpose, 270 perforated steel plates were modelled and analysed using ABAQUS software. The effects of four main variables includ...

Assessment of the ultimate capacity of the cellular steel beams subjected to the lateral-torsional buckling containing web distortion (lateral-distortional buckling) was rarely investigated. So far, there is no accurate formula to predict the lateral-distortional buckling (LDB) capacity of such members. Here, extensive simulations (660 specimens) b...

The effects of web distortion on the buckling behavior of castellated steel beams have rarely been studied; and so far, no exact formula has been proposed to predict the lateral-distortional buckling (LDB) capacity of such beams. Therefore, in the following paper, an attempt has been made to propose new formulas for predicting the LDB capacity of c...

Incorporating steel fibers to the concrete members enhances the shear capacity. The shear capacity of steel fiber reinforced concrete (SFRC) beams is an important issue for designing the reinforced concrete structures. Due to numerous parameters that affect the shear capacity of SFRC beams, developing an exact equation to measure the shear resistan...

This paper examined the effects of web distortion on the buckling behavior of castellated steel beams. To this purpose, a series of nonlinear finite element (FE) models was constructed and well verified against an experimental work on the distortional buckling of castellated beams; both material nonlinearities and initial geometric imperfections we...

Assessment of the ultimate capacity of the cellular steel beams subjected to the lateral-torsional buckling containing web distortion (lateral-distortional buckling) was rarely investigated. So far, there is no accurate formula to predict the lateral-distortional buckling (LDB) capacity of such members. Here, extensive simulations (660 specimens) b...

A soft computing based study aimed to predict the shear capacity of steel fiber RC (SFRC) beams is qualified and new formulae based on gene expression programming (GEP) and nonlinear multiple regression (NMR) are suggested. To extend the proposed formulae, extensive experimental data collected from existing studies in the literature were considered...

Artificial neural networks (ANNs) as a powerful approach have been widely utilized to demonstrate some of the engineering problems. A three-layer ANN including three neurons in the hidden layer is considered to produce a verified pattern for assessing the compressive strength of concrete incorporating metakaolin (MK). For this purpose, an extensive...

Utilizing of CFRP for confining concrete columns has been demonstrated to improve the capacity and ductility of columns. In reason of numerous parameters that affect the compressive strength of the CFRP confined rectangular concrete columns (CRCC), developing formula is complicated. In the current study, three methods are evaluated for predicting t...

The present experimental study has considered the mechanical, physical, and microstructural characteristics of mortars which were immersed in the hydrochloric acid (HCL) solution. The cement has been substituted partially with ceramic waste powder (CWP) in quantities of 0, 5, 10, 15, 20, and 25%. To simulate the HCL deposits, the prepared mortars i...

The copper production process causes waste and by-products called waste copper slag (WCS). A considerable amount of WCS is produced globally. This research aims to utilise WCS as an alternative to natural coarse aggregate in self-compacting concrete (SCC). To achieve this goal, WCS was utilised in different percentages (0%, 10%, 20%, 30%, 40%, 50%,...

Artificial Neural Network (ANN) model was developed as a reliable modeling method for simulating and predicting the ultimate moment capacities of castellated steel beams. The training and testing data for neural networks are obtained using Finite Element Analysis (FEA). For this purpose, a series of nonlinear finite element analyses have been carri...

In this study, the new groups of iterative techniques for solving nonlinear equations used for geometrically nonlinear analysis of space truss are extended by applying the iterative methods. Iteration of the suggested methods lies in a three-step algorithm. Also, the analysis results of convergence show that the proposed techniques have fourth-orde...

To investigate the acidic behavior of self-compacting concrete (SCC) incorporating Copper Slag (CS), a series of seven mixtures with different percentages of CS as cement replacement was produced. The specimens were replaced by 0%, 5%, 10%, 15%, 20%, 25% and 30% CS of total binder. Two types of acids as sulfuric acid and hydrochloric acid are used...

A predictive model based on the artificial neural network (ANN) was generated to assess the compressive strength of Mortar incorporating metakaolin (MK). For this purpose, a database was gathered from different works of literature for use in the ANN model. Therefore, five predictive variables as the inputs of the ANN model were considered, includin...

Fiber Reinforced Polymer (FRP) was extensively employed as external confinement to strengthen the RC structures. Substantial studies were carried out in order to assess a more exact formula for measuring the strength enhancement of such strengthens concrete columns. A database from several experimental tests was gathered. A comparison between the e...

Inclusion of steel fibers to concrete progresses the flexural and tensile capacities of concrete. Consequently the shear capacity of concrete flexural members improve. Predicting the shear capacity of concrete beams containing steel fiber is an important issue not only in structural design but also to retrofitting of existing structures. Since ther...

Following publication of the original article (Sharifi et al. 2016), the author reported his name has erroneously spelled as Amin Momeni. The full name is Mohammadamin Momeni.

In the present study, thermal and mechanical characteristics of cement mortar incorporating Ceramic Waste Powder (CWP) as cement replacement were examined. The cement of the mortar mixes has been replaced with CWP which was provided from Almas-Kavir Company (Iran) in amounts of 5%, 10%, 15%, 20% and 25% (by weight of cement). The mortar specimens w...

Artificial neural network (ANN) models were applied for simulating and predicting the ultimate capacities of cellular steel beams. To do this, at the first, different neural networks by various learning algorithms and number of neurons in the hidden layer were simulated. The required data for networks in training, validating, and testing state were...

An artificial neural network model was developed as a reliable modeling method for simulating and predicting the ultimate force capacities of cellular steel beams. The required data in training, validating, and testing states were obtained from a reliable database. A new formula based on the artificial neural network was proposed to predict the fai...

A new model based on Artificial Neural Network (ANN) was established as a trustworthy technique for predicting ultimate lateral torsional buckling (LTB) capacity of castellated steel beams. The required information for training, validating and testing of the developed model obtained from a reliable database. Consequently, a new formulation based on...

In the current study two methods are evaluated for predicting the compressive strength of concrete containing metakaolin. Adaptive neuro-fuzzy inference system (ANFIS) model and stepwise regression (SR) model are developed as a reliable modeling method for simulating and predicting the compressive strength of concrete containing metakaolin at the d...

A stepwise regression (SR) model is developed as a reliable modeling method for simulating and predicting the compressive strength of mortars containing metakaolin at the age of 3, 7, 28, 60, and 90 days. The required data in training and testing state obtained from a reliable data base. A new formulation based on the model have been proposed to pr...

The aim of this paper is to investigate the mechanical properties of self-consolidating concrete (SCC) incorporating ground copper slag (GCS) as cement replacement. Herein, SCC has been produced using GCS as cement replacement by weight ratios of 5, 10, 15, 20, 25, and 30%. The mechanical and durability properties of self-consolidating ground coppe...

This paper reports on the development of a three-dimensional finite-element model for inelastic non-linear flexural buckling analysis of steel I-beams. The model was used to investigate the effects of unbraced length and yield strength on member moment capacity. Unlike existing design codes, the model considers the effect of web distortions in a la...

The successful completion of the present research would be achieved using ground waste glass (GWG) microparticles in self-consolidating concrete (SCC). Here, the influences of GWG microparticles as cementing material on mechanical and durability response properties of SCC are investigated. The aim of this study is to investigate the hardened mechan...

Steel structural members are likely exposed to corrosive environments, and thus corrosion is one of the dominant life-limiting factors of steel structures. Extensive studies on the effects of pitting and uniform corrosion on the strength performance of steel structural members under a wide variety of loading conditions have been undertaken to asses...

Purpose – Nowadays, with the expansion of terrorist operations around the world and also the dangers of accidental explosions, the need to design structures resistant to this phenomenon for the protection and safety of its citizens is inevitable. Tall buildings are one of the most important issues because of which those behavior should be investiga...

Steel bridges corrode due to environmental exposure. The consequence is a reduction in both the load-carrying capacity and safety of a bridge. Therefore, it is needed to evaluate procedures for an exact prediction of the load-carrying capacity and reliability of bridges, in order to make reasonable decisions about repair, rehabilitation and renewal...

Concrete has been used for many years as an important building material in constructions such as buildings, dams, tunnels, roads, piers and towers. The reason for this is high durability compared to the cost of production and availability of materials. Self-compacting concrete is one of the new concretes that in recent years due to the properties o...

Half-through girders are not affected by conventional lateral-torsional buckling. I-section beams of simply supported half-through girders experience compression in their top flanges and tension in their bottom flanges. In this condition, the compression flange is restrained only by the stiffness of the web, and the buckling mode is generally restr...

In the present paper, a developed stepwise regression (SR) model for predicting the member moment capacity of half-through I-section bridges girders has been presented. The reliable database (training and testing data) for SR-based model are generated by a developed Finite Element (FE) model which has been verified by related existing experimental...

کمانش اعوجاجی مد کمانشی نسبتا جدیدی است که در چند ده سال اخیر مورد بررسی قرار گرفته است و می توان گفت حاصل اندرکنش کمانش موضعی با کمانش جانبی-پیچشی است.در این نوع کمانش، مقطع تیرعلاوه بر حرکت جانبی بصورت قائم نیز خمیده می شود و این خمش در مقطع تیر مهمترین عامل در کاهش مقاومت تیر می باشد.تاکنون در هیچ آیین نامه ای رابطه دقیقی برای این نوع کمانش ارائ...

In this study, the fresh properties of self-compacting concrete (SCC) incorporating ground waste glass (GWG) as cementing material were experimentally investigated. GWG was used as a partial replacement for cement at replacement levels of 0, 5, 10, 15, 20, 25 and 30% by weight. Reducing the consumption of cement in construction is a major issue in...

Steel beams are extensively used as main structural in various building infrastructures such as bridge girders. Steel structures are prone to suffer various types of damage as they get older. Corrosion may be one of the most important types of damage in ageing steel structures. In a pessimistic state, an area of opening may be created along the bot...

This paper reports on an experimental programme to investigate the effect of using ground copper slag (GCS) as a replacement of cement on the fresh properties of self-consolidating concrete (SCC). Totally, seven self-compacting ground copper slag concrete (SCGCSC) mixtures were made with a fixed water–powder ratio of 0.51 in which a portion of the...

ABSTRACT:Corrosion is an unavoidable phenomenon in ship hull structures and thickness loss of the structural members due to corrosion is a great concern when the integrity of hull structures is considered. It is well known that pitting corrosion occurring on coated hold frames will surely result in a significant degradation of the ultimate strength...

Steel beams with continuous and complete tension flange restraint buckle in a restrained distortional buckling (RDB) mode. Lateral buckling of half-through girders is an important example of this phenomenon because of the restraint offered by the deck, and due to the flexibility of the web in restraining the compressive flange. A numerical study wa...

The aims of this study are to investigate the effect of corrosion on the load-carrying capacity of stiffened steel box girder bridges and to formulate a repair schedule using reliability-based approaches for such bridges as they age. A credible scenario for a corroded steel box section is estimated. Corrosion rates and their probabilistic character...

Bridge girders exposed to aggressive environmental conditions are subject to time-variant changes in resistance. There is therefore a need for evaluation procedures that produce accurate predictions of the load-carrying capacity and reliability of bridge structures to allow rational decisions to be made about repair, rehabilitation and expected lif...

In recent years, an emerging technology termed high-strength concrete (HSC) has become popular in construction industry. Present study describes an experimental research on the behavior of high-strength concrete beams in ultimate and service state. Six simply supported beams were tested, by applying comprising two symmetric concentrated loads. Test...

With increasing environmental pressure to reduce solid waste and to recycle as much as possible, the concrete industry has adopted a number of methods to achieve this goal by replacement of waste glass with concrete composition materials. Due to differences in mixture design, placement and consolidation techniques, the strength and durability of Se...

Corrosion is one of the most pervasive types of structural problem experienced by steel girder structures especially in corrosive environments. Each of the damage modes, if not properly monitored and rectified, can potentially lead to catastrophic failure or unanticipated out-of-service time. The purpose of this paper is to propose a simple methodo...

In recent years, an emerging technology termed Self-Consolidating Concrete (SCC) become popular in construction industry. A series of experimental tests carried out to investigate the structural behavior of SCC reinforced beams. A comparison between the experimental results and theoretical calculations based on the codes provisions has been also do...

The aim of the present study is to investigate the effects of uniform corrosion on the load-carrying capacity of steel beam sections. In this paper, a credible corrosion model for damaged steel beams has been developed based on the real existing data. Thickness loss data were compiled from corrosion damaged samples beams which picked up from a petr...

In this study seventy six standard specimens were taken from flanges and webs of three severely corroded steel beams that were recovered from a petrochemical site. The specimens were measured carefully for data on depth of corrosion and corrosion pitting; and also they were subjected to cyclic loads using a servo-hydraulic machine in order to obtai...

Deteriorated bridges are subjected to time-variant changes of resistance. Corrosion is one of the most important types of deterioration in steel bridges. The consequence is a reduction in safety of a bridge. Therefore, it is needed to evaluate procedures for an accurate prediction of the load-carrying capacity and reliability of corroded bridges, i...

Most of steel structures in various industries are subjected to corrosion due to environmental exposure. Corrosion damage is a serious problem for these structures which may reduce their carrying capacity. These aging structures require maintenance and in many cases, replacement. The goal of this research is to consider the effects of corrosion by...

Corrosion is one of the main causes of deterioration in steel structures. Loss of thickness in flanges and web of corroded steel beams leads to reduction in section properties which can reduce the lateral torsional buckling capacity of the member. In this paper, thickness loss data were compiled from four samples of corrosion damaged I-beams remove...

The focus of this article is to present a new and simple mathematical model that may be used to determine the optimum location of a belt truss reinforcing system on tall buildings such that the displacements due to lateral loadings would generate the least amounts of stress and strain in building’s structural members. The effect of belt truss and s...

Steel structures are subjected to corrosion due to environmental exposure and inadequate maintenance. As a result, the carrying capacity and hence the level of safety of this structures diminishes with time due to accumulation of corrosion damage (e.g. section loss). For the assessment of the remaining moment capacity of corrosion damaged I-beams,...

There are a large number of steel structures subjected to corrosion due to environmental exposure; which results in reduction of its load carrying capacity. In this paper, thickness loss data were compiled from three samples of corrosion damaged I-beams, removed from a petrochemical industry. Common examples of corrosion that were found included da...

This study develops an assessment procedure for the ultimate strength reliability of steel box girder bridges that takes into account the plate member degradation that results from uniform corrosion in different environmental condi-tions. This paper is a sequel to the authors' previous paper (Sharifi and Paik 2010), which deals with the effects of...

In this paper the main aspects that are associated with stress concentration created by corrosion are reviewed and separate functions are produced for fatigue notch factor in terms of average corrosion penetration and exposure time. In particular, the relation of fatigue notch factor in terms of exposure time gives a direct, accurate, and quantifia...

In this paper a mathematical model for the combined system of framed tube, shear core and belt truss is developed with the objective of determining the optimum location of belt truss along the height of the building. The effect of belt truss and shear core on a framed tube is considered as a concentrated moment at the belt truss location. This conc...

The nature of High Strength Concrete, HSC, is brittle failure and although the behavior of reinforced concrete beams heavily steel reinforced are increased in strength, the ductility, which is important in seismic regions, is in question. In other words, such beams, while consisting of HSC, are more brittle. In this paper, the ductility of such mem...

To investigate the serviceability conditions of High Strength Concrete (HSC) beams, thetotal number of 6 beams (L = 2 m, b = 0.2 m, h = 0.3 m) heavily reinforced with different ratios of rand r¢ were cast and tested under bending load. During the test the concrete and steel strains,deflection and crack width are measured at different beam locations...