Seyed Shaker Hashemi

Seyed Shaker Hashemi
Persian Gulf University | PGU · Department of Civil Engineering

About

32
Publications
8,250
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144
Citations
Citations since 2017
15 Research Items
112 Citations
20172018201920202021202220230102030
20172018201920202021202220230102030
20172018201920202021202220230102030
20172018201920202021202220230102030
Additional affiliations
December 2009 - present
Persian Gulf University
Position
  • Professor

Publications

Publications (32)
Article
Studying the potential of progressive collapse in structures is a new topic in the field of passive defense and has attracted the attention of many researchers, recently. This research investigates the behavior of steel structures with 3D sandwich infill panels after extensive damage. For this purpose, several moment resisting steel frames with dif...
Article
Full-text available
Nowadays, Reinforced Concrete (RC) wall-slab systems are being used more extensively due to their effective performance seen in past earthquakes. Progressive collapse is a phenomenon in which all or part of a structure is damaged due to damage or collapse of a small relevant part. The majority of research done in the field of progressive collapse h...
Article
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n this paper, reinforced concrete (RC) deep beams (DBs) have been analyzed numerically and a new approach is proposed to the nonlinear numerical modeling of such structural members. The effect of shear deformations and the interaction between reinforcing steel bar and concrete are considered in modeling and analysis. In order to consider the effect...
Article
Full-text available
As the concrete material is eliminated from the locations situated around the middle of the cross-sections of bubble decks (BDs), chiefly at mid-span, the DB type slabs are lighter than the solid slabs. That is why the use of the BD slabs has been augmented recently. In the building codes of practice, the response modification factor (RMF) is gener...
Article
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In this paper, the behaviour of reinforced concrete (RC) elements has been studied and a new shear stress-strain (SS-S) model is proposed for RC deep beams. Timoshenko beam theory is applied to consider the effect of shear deformations in numerical models. To take into account, the effect of bar-concrete interaction, the deep beam is divided into s...
Article
Full-text available
In the present paper, the fiber theory has been employed to model the reinforced concrete (RC) deep beams (DBs) considering the reinforcing steel bar-concrete interaction. To simulate numerically the behavior of materials, the uniaxial materials’ constitutive laws have been employed for reinforcements and concrete and the bond stress-slip between t...
Article
Every year, thousands of bridges around the world are destroyed by scouring around their piers. One of the methods to control and protect the piers against scouring is to use submerged vanes. The purpose of this paper is to investigate the effect of upstream submerged vanes on scouring around the bridge pier and bed topography changes. For doing ex...
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To estimate the cost of a building prior to the detail design phase, engineers and project managers need suitable tools and guidelines. Steel is an important construction material that is used in high volumes in buildings and has a significant role in the total cost of projects. In this paper, the application of the artificial neural network (ANN)...
Article
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Since in bubble deck (BD) system, the concrete in the middle of deck’s cross sections, mainly in the middle of the spans, is removed, the slabs become lighter compared to the traditional slabs. The application of this type of structural system has been recently increased. In the researches, the ductility factor is expressed generally for the reinfo...
Article
In this study, scouring around piers perpendicular to flow (PPF) and piers toward the flow (PTF) under clear-water condition was examined by placing a set of triad cylindrical piers with a 5-cm diameter and a 15-cm center to center distance at the positions of 60, 90, and 120° of the bend at a constant flow rate of 70 l per second. Natural sand of...
Article
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The local buckling has always been known as an undesirable and destructive phenomenon in steel structures. Thus, it is necessary to identify the effective factors in local buckling of the steel box column. Currently, box columns are generally fabricated by welding plates using fillet or groove welds with various manufacturing patterns,in terms of w...
Article
Full-text available
The capacity of reinforced concrete sections highly depends on the interaction between reinforcing bars and surrounding concrete. The buckling of longitudinal steel bars have an important role in the nonlinear behavior of RC sections. In order to nonlinear analyzing of the bar's buckling in RC columns, two types of column and joint elements are mod...
Article
Full-text available
Spur dikes are used widely as flow control structures in rivers. The main direction of the flow is changed by a spur dike, which is accompanied by formation of separation and reattachment zones around the spur dike. This study was focused on the effect of a submerged single T-shaped spur dike and the influence of the distance between non-submerged...
Article
One of the methods to strengthen the structures against the seismic lateral loading is the employment of the composite columns. A concrete-filled tube (CFT) has the cumulative advantages of steel and concrete. Concrete-filled steel tube columns have been widely used in the moment-resisting frame (MRF) structures, located in both non-seismic zones a...
Article
Full-text available
In this paper, a new approach for nonlinear numerical modelling of the reinforced concrete shear walls with consideration of bar-concrete interaction and shear deformation is proposed. Bar and concrete stress-strain relations, the bar-concrete interaction, the shear stress-strain relation and, also, their cyclic behavior including the strength degr...
Article
Currently, box columns are fabricated by welding plates using fillet or groove welds. According to probable seismic failure mechanism of these columns, their nonlinear behavior in terms of ductility and strength is necessary. In this research, a variety of columns with different welding patterns including groove and fillet welding with various over...
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Full-text available
In this paper, the bed topography of a channel at a 90-degree bend was studied at the T-shaped spur dike installed at the middle of the outer bank. Numerical analyses were performed with the Sediment Simulation in Intakes with Multiblock Option (SSIIM) model. Three relative curvatures (R/B = 2, 3, and 4) related to the three sediment densities (P =...
Article
Full-text available
In this paper, flow and scour patterns resulted from the installation of two T-shaped spur dikes were evaluated in a 90° bend under clear water conditions. The submerged and non-submerged spur dikes were modeled at different locations in the bend using the numerical model. Based on the dikes’ location and submergence, different scour holes on the c...
Article
Spur dikes have been usually applied as river-training structures for many years. One of the spur dikes with the proper application in the regulation of rivers is a T-shaped spur dike. In this paper, we study the effects of relative curvature of bend on scour pattern due to installation of a T-shaped spur dike with equal ratio of wing to web length...
Article
The nonlinear behavior of reinforced concrete columns subject to biaxial bending and consideration of bond-slip at the steel-concrete interface are investigated. Separate degrees of freedom are used for the steel and concrete parts to allow for the difference in displacement between the reinforcing bars and the surrounding concrete. The effect of b...
Article
Full-text available
In this research, the effects of embedded length and pull-out force on the seismic behavior of a reinforced concrete (RC) column were investigated. Separate degrees of freedom were used for the steel and concrete parts in the nonlinear modeling of the RC elements in order to consider the bond-slip effect. The analytical method was assessed through...
Article
Full-text available
In this research, based on a nonlinear analysis of reinforced concrete moment-resisting frames, the bond-slip effect between concrete and bars along the lengths of beam, column, and joint elements was applied to numerical equations. The governing theory in the numerical equations was similar to that of the fiber model, but the perfect bond assumpti...
Article
Full-text available
In this paper, the bond-slip effect has been applied to the numerical equations in the process of nonlinear dynamic analysis of reinforced concrete frames. The formulation is similar to that of the layer sectiontheory, but the perfect bond assumption has been removed. The precision of the proposed method in considering the real nonlinear behavior o...
Article
In this article, a numerical model based on the layer approach is introduced for nonlinear cyclic analysis of two-dimensional reinforced concrete frames. The advantage of the proposed analytical procedure is that it takes the bond-slip, shear-slip and pull-out effects and, also, shears deformation in the joints into account. Bar and concrete stress...

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