Amin Mohebkhah

Amin Mohebkhah
Malayer University · Civil Engineering

PhD

About

40
Publications
23,103
Reads
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1,033
Citations
Citations since 2017
14 Research Items
766 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
April 2017 - present
Malayer University
Position
  • Professor (Associate)
January 2008 - April 2017
Malayer University
Position
  • Professor (Assistant)
Education
October 2003 - December 2007
Tarbiat Modares University
Field of study
  • Structural Engineering
October 2000 - December 2002
Urmia University
Field of study
  • Structural Engineering
October 1995 - November 1999
University of Sanandaj
Field of study
  • Civil Engineering

Publications

Publications (40)
Article
The linked column steel frame (LCF) system is a new load resistant system; that by using replaceable ductile links, it can provide the desired structural behavior. The optimal performance of this system can be achieved by controlling the displacements and the sequence of yielding fuses in the structure. The direct displacement-based design (DDBD)...
Article
Confined masonry walls (CMWs) are generally used as a suitable type of lateral force resisting systems in earthquake prone regions. The RC confining members (tie-beams) in such walls are mainly used to provide integrity and increase the ductility of masonry buildings. Considering the inherent complexities of structural behavior of masonry materials...
Article
Concrete- and timber-filled steel tubes (CTFSTs) have gained interest and popularity over the past few years. This popularity is mostly due to the high compressive strength of the timber, which makes it a perfect choice (as a green alternative) to be substituted (at least) with part of the concrete. The concrete, on the other hand, has an adverse e...
Article
The direct displacement-based design method is developed for the LCF structural system. The proposed design method includes the introduction of the analytical relationships for the yield drift profile calculations developed in the companion paper (Part 1), selection of the design displacement profile in the LCF system and providing criteria to cont...
Article
The linked column frame (LCF) system is a load resisting system in which replaceable link beams are used to provide the desired structural behavior at various performance levels. The optimal performance of this system can be achieved by controlling the successive yielding pattern of its structural fuse elements using performance-based seismic desig...
Article
Linked column steel frame system (LCF) is a new lateral-gravity resisting system aimed at reducing the time and costs of repairs after a seismic event. The performance objectives of this system are highly dependent on the deformations and the sequences at which fuses are formed in the structure. Therefore, in order to meet the performance objective...
Conference Paper
Full-text available
EXTENDED ABSTRACT Confined masonry buildings (CMBs) are often used as an earthquake resistant system even in high seismicity areas, particularly in villages and towns. This system consists of some structural masonry walls (consisting of units and mortar bands) accompanied by horizontal and vertical reinforced concrete tie/bond beams. The behavior o...
Article
This paper deals with the cyclic behavior and shear capacity of non-compact steel castellated link beams (CLBs) using finite element analysis. To enhance the shear resistance and inelastic rotation capacity of such vulnerable link beams, some retrofitting strategies are explored and examined. To this end, a three dimensional finiteelement model usi...
Article
There are several ancient stone masonry structures of great archeological significance in earthquake-prone areas around the world. Kaʻba-ye Zartošt (Cube of Zoroaster) is a 14.0 m square in shape tower, which was built using white limestone blocks and dry joints. The tower dates back to the Achaemenid empire era and is located in the earthquake-pro...
Article
A methodology aiming to predict the vulnerability of masonry structures under seismic action is presented herein. Masonry structures, among which many are cultural heritage assets, present high vulnerability under earthquake. Reliable simulations of their response to seismic stresses are exceedingly difficult because of the complexity of the struct...
Conference Paper
There are several ancient stone masonry structures of great archeological significance in earthquake prone areas around the world. Kaʻba-ye Zartošt (Cube of Zoroaster) is a 14.2 m square in shape tower, which was built using white limestone blocks and dry joints. The tower dates back to the Achaemenid empire era and is located in the earthquake pro...
Article
Full-text available
Knowledge of allowable differential settlement is necessary for foundation design. Differential settlements may cause additional stresses and strains in structural members. The stresses induced by differential settlements are not conventionally considered in designing superstructure. The differential settlements are generally determined from separa...
Article
Soft clay strata can suffer significant settlement or stability problems under building loads. Among the methods proposed to strengthen weak soils is the application of a stone masonry trench (SMT) beneath RC strip foundations (as a masonry pad-stone). Although, SMTs are frequently employed in engineering practice; however, the effectiveness of SMT...
Article
Full-text available
One of the major threats to the stability of classical columns and colonnades are earthquakes. The behavior of columns under high seismic excitation loads is non-linear and complex since rocking, wobbling and sliding failure modes can occur. Therefore, three dimensional simulation approaches are essential to investigate the in-plane and out-of-plan...
Article
Full-text available
Abstract Braced steel frames are sometimes designed with out-of-plane shifted bracing members on the first story due to architectural or functional considerations. Such frames are classified and designated as frames having the Type-4 horizontal structural irregularity entitled "frames with out-of-plane offset irregularity" as per the Minimum Desig...
Chapter
In this chapter, the different modeling strategies for simulating the behavior of masonry infilled frames are investigated. Particular emphasis is given on the suitability of the Discrete Element Method (DEM) to accurately represent the mechanical behavior, strength and ductility of concrete and brickwork masonry infilled frames. Within DEM, masonr...
Article
Full-text available
Direct Displacement-Based Design (DDBD) is a performance-based seismic design method that has been proposed and well developed over the past two decades to design RC frame structures, shear walls and bridges. In this method, an equivalent single-degree-of-freedom (SDOF) substitute structure is utilized to estimate seismic displacement demands of a...
Article
The effect of moment gradient on the buckling moment resistance of I-beams can be taken into account by the use of an equivalent moment-gradient factor Cb. The Cb factors given by the previous researchers have been derived from elastic lateral-torsional buckling (LTB) analysis of compact I-beams. However, according to the available literature it is...
Chapter
The majority of historical and heritage structures around the world consist of unreinforced masonry walls. A masonry structure is composed of masonry units, such as brick or marble blocks, with or without a joint filling material, such as mortar. A masonry with a joint material is usually made of two different materials (i.e. masonry units and mort...
Chapter
Full-text available
The majority of historical and heritage structures around the world consist of unreinforced masonry walls. A masonry structure is composed of masonry units, such as brick or marble blocks, with or without a joint filling material, such as mortar. A masonry with a joint material is usually made of two different materials (i.e. masonry units and mort...
Conference Paper
Full-text available
Special composite RC shear wall (CRCSW) with steel boundary elements is a kind of lateral force resisting structural systems which is used in earthquake-prone regions. Due to their high ductility and energy dissipation, CRCSWs have been widely used in recent years by practitioner engineers. Direct Displacement-Based Design (DDBD) is a performance-b...
Article
The use of short link beams in Eccentrically Braced Frames (EBFs) is generally preferred to long ones, mainly due to their high rotation capacity and energy dissipation under cyclic loadings. However, long links have the advantage of providing openings in the braced spans of EBFs. Based on a few tests conducted on long link behavior in the literatu...
Article
Full-text available
Lateral-torsional buckling (LTB) and flange local buckling (FLB) are treated as two independent phenomena in AISC-LRFD 360-10 in which the flexural capacity of locally buckled beams is determined as the minimum value ob-tained for the limit states of LTB and FLB. A 3-D nonlinear finite-element model using ABAQUS is developed in this re-search to in...
Article
The in-plane contribution of infill walls on the structural response of infilled frame structures is an important problem and many research initiatives, via experimental and numerical methods, have been conducted in order to investigate it thoroughly. As a result, the need to consider these research findings on the structural performance has been a...
Article
Full-text available
Numerical analysis of masonry-infilled steel frames (MISFs) is one of the greatest challenges faced by struc-tural engineers. This difficulty results from the presence of joints as the source of discontinuities and nonlinearities as well as the interaction of frame-infill panel. In spite of many studies performed on numerical modeling of solid MISF...
Article
a b s t r a c t According to the Specification for structural steel buildings (AISC-LRFD 360-10), the nominal flexural capacity of I-beam sections having compact webs and noncompact or slender flanges can be estimated as the lower value obtained for the limit states of lateral-torsional buckling (LTB) and compression flange local buckling (FLB). Th...
Article
a b s t r a c t This article deals with an experimental program to investigate the in-plane seismic behavior of steel frames with clay brick masonry infills having openings. Six large-scale, single-story, single-bay frame specimens were tested under in-plane cyclic loading applied at roof level. The infill panel specimens included masonry infills h...
Article
Lateral-torsional buckling (LTB) strength of steel I-beams subjected to moment gradient loading is scaled by the moment gradient factor, Cb. The Cb factor depends on the non-uniformity of moment diagram, the height of the applied transverse loads within the unbraced length and end conditions. Generally, the Cb factors given by codes have been deriv...
Article
a b s t r a c t Lateral-torsional buckling (LTB) strength of steel I-beams subjected to moment gradient loading is scaled by the moment gradient factor, C b . The C b factor depends on the non-uniformity of moment diagram, the height of the applied transverse loads within the unbraced length and end conditions. Generally, the C b factors given by c...
Article
Nonlinear numerical modeling of masonry-infilled frames is one of the most complicated problems in structural engineering field. This complexity is attributed to the existence of joints as the major source of weakness and material nonlinearities as well as the infill-frame interaction which cannot be properly modeled using the traditional finite el...
Article
Full-text available
Nonlinear numerical modeling of masonry-infilled frames is one of the most complicated problems in structural engineer-ing field. This complexity is attributed to the existence of joints as the major source of weakness and material nonlinearities as well as the infill-frame interaction. Although there are many numerical studies on micro-modeling of...
Article
Lateral-torsional buckling can be avoided by properly spaced and designed lateral bracing. Bracings are usually assumed to be elastic, and so may be characterized by their elastic stiffnesses. It is well known that an elastic lateral brace restricts partially the lateral buckling of slender beams and increases the elastic buckling moment. However,...
Article
It is well known that if the moment in an I-beam is not constant throughout, the lateral–torsional buckling moment is greater than the same moment in pure bending. In other words, the value of moment-gradient factor (Cb) is always greater than unity. However, the effect of discontinuities in the cross section on the moment-gradient factor has not b...

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Projects

Projects (3)
Project
One of the major threats to the stability of classical columns and colonnades are earthquakes. The behavior of columns under high seismic excitation loads is non-linear and complex since rocking, wobbling and sliding failure modes can occur. Our research focuses on understanding the complex dynamic behaviour of rigid bodies such as those found in ancient columns and collonades for cultural heritage preservation.
Project
I am currently working on the bearing capacity of strip footings on a rubble stone masonry trench in soft clay.