Kambiz Narmashiri

Kambiz Narmashiri
Islamic Azad University, Zahedan Branch · Department of Civil Engineering

Associate Professor
Evaluation, repair, and strengthening of structures using different materials and methods, specially FRP composites.

About

69
Publications
44,538
Reads
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418
Citations
Citations since 2016
24 Research Items
310 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
January 2008 - January 2011
University of Malaya
Position
  • Researcher
January 2000 - present
Islamic Azad University, Zahedan Branch
Position
  • Research Assistant
Education
January 2008 - January 2011
University of Malaya
Field of study
  • Structural Engineering (Strengthening of Structures)

Publications

Publications (69)
Article
Full-text available
In this paper, the performance of square hollow section (SHS) steel columns with defect at different temperatures is investigated. Accordingly, the columns are constructed with different locations of the defect in 6 modes. The specimens are also exposed to five temperatures of 20 °C (ambient temperature), 100 °C, 250 °C, 500 °C, and 700 °C. Afterwa...
Article
Full-text available
Steel is one of the most widely used materials in structures due to its high strength and speed of execution. One of the most important disadvantages of steel is corrosion damage and low fire resistance. When the temperature of the steel exceeds a certain value, its strength decreases to a great extent; therefore, in this paper, the performance of...
Article
Full-text available
Steel structures are damaged for a variety of reasons including accidental loads, corrosion and reduced strength which need to be repaired and improved. In this investigation, local corrosion was applied to the steel circular columns and the effects of Carbon Fiber Reinforced Polymer (CFRP) for strengthening has been studied. 19 specimens of steel...
Article
Stemming from unfavorable environmental conditions, corrosion can adversely affect the behavior of steel structures and damage them. To investigate this phenomenon and study the failure mode and load bearing capacity of corroded slender steel columns to retrofit them by Carbon Fiber Reinforced Polymer (CFRP), 8 equal-height slender Circular Hollow...
Article
Full-text available
New methods for strengthening steel structures using fibre-reinforced polymer composites have been the subject of much recent research. Few studies have been carried out on shear strengthening of plate girders using carbon-fibre composites. In the study reported in this paper, the impact of carbon-fibre composite plates on end-zone shear capacity o...
Article
Full-text available
Steel structures are one of the most used type of structures. Some of the steel structures may need to be strengthened due to different reasons. There are different methods for strengthening of this kind of structures. In recent years, strengthening of steel structures using Fiber Reinforced Polymers (FRP) has been most interested. This study inves...
Article
Full-text available
Several deficient steel structural members require to be strengthened all over the world. In this article, horizontal defects were generated at three locations (top, middle, and bottom) on the middle element and the middle of the side element. Consequently, the effects of the location of such defects on axial behavior of Carbon Fiber Reinforced Pol...
Article
Full-text available
Recently, application of concrete filled steel tubes (CFST) columns has been widely trended due to their several advantages. Some of the CFST columns may been damaged due to different problems and need to be strengthened. One of the methods which can be applied to improve the efficiency of the damaged columns is the strengthening using fiber reinfo...
Article
Full-text available
Strengthening steel Square Hollow Section (SHS) short columns with initial deficiencies were not taken into account appropriately. In this paper, vertical deficiencies with the same dimensions were created at three locations (top, middle, and bottom) on the middle element and the middle of the corner element. Then, the effect of location of such de...
Article
Full-text available
In view of development and repair costs, support of structures is imperative. Several factors, for example, design and calculation errors, absence of appropriate installation, change of structures application, exhaustion, seismic tremor, fire and natural conditions diminish their strength. In such cases, structures have need of rehabilitation and r...
Article
Recently, strengthening of structures using Fiber Reinforced Polymer (FRP) has received the great attention of researchers. Shear and normal stresses intensity are two important factors which cause Carbon Fiber Reinforced Polymer (CFRP) end debonding in strengthened steel beams. To this end, flexural strengthening of steel beams by Mechanically Fas...
Article
Numerous problems have always vexed engineers with buckling, corrosion, bending, and over-loading in damaged steel structures. The present study aims to study the possible effects of Carbon Fiber Reinforced Polymer (CFRP) for strengthening deficient Steel Square Hollow Section (SHS) columns. To this end, the effects of axial loading, stiffness valu...
Article
Full-text available
Civil engineers have always been vexed by such numerous problems such as buckling, corrosion, bending, and over-loading in damaged steel structures. The present study is aimed to evaluate the possible effects of the CFRP (Carbon Fiber Reinforced Polymer) on deficient steel Square Hollow Section (SHS) columns. Three specimens were tested to failure...
Article
In recent decades, the application of carbon fibre-reinforced polymer (CFRP) composites for strengthening structural elements has become an efficient option to meet the increased cyclic loads, or repair due to fatigue cracking. The premature failure due to end-debonding is a key limitation to achieve high fatigue performance of strengthened steel b...
Article
Full-text available
Structures may need retrofitting as a result of design and calculation errors, lack of proper implementation, postconstruction change in use, damages due to accidental loads, corrosion and changes introduced in new editions of construction codes. Retrofitting helps to compensate weakness and increase the service life. Fiber Reinforced Polymer (FRP)...
Article
Full-text available
In past years, numerous problems have vexed engineers with regard to buckling, corrosion, bending, and over-loading in damaged steel structures. This article sets out to investigate the possible effects of carbon fiber reinforced polymer (CFRP) and steel plates for retrofitting deficient steel square hollow section (SHS) columns. The effects of axi...
Article
Full-text available
Steel structures may need rehabilitation and restoration due to different reasons including design and calculation errors, lack of proper implementation, change in application, damage as a result of random loads, exhaustion and corrosion, and natural disasters such as earthquakes, fires, and environmental conditions. Carbon Fiber Reinforced Polymer...
Article
Full-text available
This paper presents the findings of experimental and numerical investigations on failure analysis and structural behavior of notched steel I-beams reinforced by bonded Carbon Fiber Reinforced Polymer (CFRP) plates under static load. To find solutions for preventing or delaying the failures, understanding the CFRP failure modes is beneficial. One no...
Article
Full-text available
In this paper, the effects of lateral bracing and web stiffeners on the Carbon Fibre Reinforced Polymer (CFRP) failure modes and buckling strength of the CFRP strengthened wide-flange steel I-beams are investigated experimentally. The study consisted of eight beams tested under static gradual load until failure. The main test variables were steel p...
Article
Full-text available
This paper presents the experimental and numerical investigations on the structural behaviors of steel square hollow section (SHS) compression members having initial horizontal or vertical deficiencies which were strengthened using Carbon Fiber Reinforced Polymer (CFRP) sheets. One non-strengthened control column and twelve specimens with different...
Article
h i g h l i g h t s Strengthening of deficient steel SHS short columns using CFRP is investigated. One non-strengthened control column and twelve deficient specimens are studied. Application of CFRP wraps recovers the strength-lost due to deficiency. Using CFRP causes increment on load-bearing capacity and delay in local buckling. a b s t r a c t T...
Article
Full-text available
Nowadays using Carbon Fiber Reinforced Polymer (CFRP) has been expanded in strengthening steel structures. Given that few studies have taken about strengthening of steel hollow pipe sections using CFRP, in present study, the effects of CFRP sheets using two layers as well as in combination with additional reinforcing strips has been assessment. Str...
Article
Full-text available
Several factors such as design and calculation errors, lack of proper implementation, change in application of structures, damage as a result of random loads, exhaustion and corrosion, and natural disasters such as earthquakes, fires, and environmental conditions lead to decreased durability. In such cases, the structure requires rehabilitation and...
Article
Full-text available
There are a large number of steel buildings and bridges deteriorated due to aging and corrosion and need to be repaired. Carbon fibre reinforced polymer (CFRP) plates are proposed to fill the lack of strength lost. This research presents the flexural behavior of deficient steel beams refurbished with CFRP strips. The various deficiencies size are i...
Article
Full-text available
Carbon fiber reinforced polymer (CFRP) has been widely used to strengthen steel members in bending. Few research studies have been carried out on strengthening steel members under axial load strengthening by CFRP. The purpose of this study is to evaluate the compressive load capacity of Square Hollow Section (SHS) steel short and slender columns st...
Article
Full-text available
Nowadays, because of construction and repair costs, maintenance of structures is indispensable. Several factors such as design and calculation errors, lack of proper installation, change structures application, fatigue, corrosion and events such as earthquake, fire and environmental conditions reduce their durability, which renew and restore to its...
Article
Full-text available
In recent years, the use of carbon fiber reinforced polymers (CFRP) for strengthening and retrofitting of steel structures has been considerably developed. Most studies have done on structural steel beams, while few studies have done on columns. Stability of columns is very important in structures. It is one of the main factors in buckling instabil...
Article
Full-text available
One of the most appropriate strengthening methods for steel beams is using CFRP strips. Though, some problems exist. One of the most important problems for this approach is sudden end-strip debonding due to high concentration of normal and shear stress. In this research, the structural behavior of steel I-beams strengthened by anchored carbon compo...
Article
Full-text available
Beams are structural elements which might need strengthening due to different reasons such as incorrect designing, wrong implementation, excessive loading, and functional changes. There are various methods for strengthening steel beams. One of modern methods is application of Carbon Fibre Reinforced Polymer (CFRP). Since one of problems of strength...
Article
Full-text available
In the past few years, new methods for strengthening usingCarbon Fibre Reinforced Polymer (CFRP) have received a considerable amount of attention in steel structures. In this study, the effect of CFRP strips and their arrangements in one or both sides of beam on shear capacity of steel beamsare studied. To this end, seven specimens of steel beam we...
Article
Full-text available
Time and environmental factors cause some problems such as rusting and decay for great constructs and buildings. Since these factors significantly contribute in reducing resistance, reducing load bearing capacity and defect created in structural components, it is required to take the necessary measures in order to improve the structure performance....
Article
Full-text available
Time and environmental factors cause some problems such as rusting and decay for great constructs and buildings. Since these factors significantly contribute in reducing resistance, reducing load bearing capacity and defect created in structural components, it is required to take the necessary measures in order to improve the structure performance....
Article
Full-text available
Background: Nowadays, because of construction and repair costs, maintenance of structures is indispensable. Several factors such as design and calculation errors, lack of proper installation, change structures application, fatigue, corrosion and events such as earthquake, fire and environmental conditions reduce their durability, which renew and re...
Article
Full-text available
Most steel structures including bridges, huge constructs and buildings are faced with problems such as rusting and corrosion due to the environmental factors including oxidation and deteriorating of some structural parts. Since these factors significantly influence on reducing strength, reduction of bearing capacity and creating structural defects,...
Article
Full-text available
Different methods have been used for reinforcing structures, among which retrofitting and decreasing the forces applied on the structure can be referred to. Braces are usually applied for retrofitting flexural frames; but they are not completely reliable systems for withstanding lateral loads. An innovative method was used in this investigation for...
Article
Full-text available
Over the last two decades, regarding the need of structures to meet design requirements, there has been a great emphasize on making structures resistance throughout the world. Today, using fiber reinforced polymer (FRP) is widely common in structural strengthening. However, this fundamental question is yet unanswered that how much are these polymer...
Article
Full-text available
In some structural members, deficiency may occur due to aging and environmental factors such as corrosion which causes decrement in load bearing capacity. In this research, to improve strength and stiffness of deficient structural members, Carbon fiber reinforced polymer (CFRP) plates are proposed. Ten beams were numerically modelled utilizing ABAQ...
Article
Full-text available
In this paper, an innovative type of yielding damper was introduced having aluminium panels and stiffened using stiffeners. Dampers are the first elements in structures which respond to seismic forces, prevent from destructive damage to other main elements of structure and reduce the costs related to structural improvement. A comprehensive numerica...
Article
Full-text available
At the moment, the major share of buildings in most of the cities and rural areas are masonry structures. Usually, these buildings lack sufficient safety due to lack of attention to the technical principles; and during earthquakes they are vulnerable. Improvement in the performance of masonry buildings has an influential role in the reduction of th...
Book
Damping causes energy dissipation in buildings while they are under earthquake or wind excitations and resulting decrement in structural responses. There are several approaches to increase the building’s damping among them using Tuned Mass Damper (TMD). TMD is a device consisting of a (or a few) mass(s), spring(s), and damper(s) that is attached to...
Book
In many parts of the world, the most devastating natural hazards for buildings are the vibrations caused by earthquake excitations to the structures. Therefore one of the main tasks of building engineers is to make structures which have good performance against earthquake vibrations. This book examines the performance of seismic isolation systems.T...
Data
The use of Carbon Fibre Reinforced Polymer (CFRP) material for strengthening of steel structures has gained significant interests recently. There are various methods used for the strengthening of steel structures. Amongst them are the application of additional steel parts, external pre-stressing of parts, and reducing or bridging the gap between th...
Book
Strengthening of steel structures is necessary to overcome durability problems, to accommodate shortcoming in design and construction process or to increase load bearing capacity. Carbon Fibre Reinforced Polymer (CFRP) is currently one of the most widely used materials for strengthening steel structures. Normally, CFRP strips for flexural strengthe...
Book
In this book, an innovative type of yielding damper is introduced having aluminum panels and stiffened using steel stiffeners. Dampers are the first elements in the structures which respond to seismic forces, prevent from destructive damage to other main elements of structure and reduce the costs related to structural improvement. A comprehensive n...
Book
In this book, aluminum panel is introduced as a novel structural yielding damper. Aluminum is a material benefiting from advantages such as low yielding stress (LYS), low weight and a wide range of plastic behavior and suitable to be used as a yielding damper material. A comprehensive numerical study using ABAQUS software was done to indicate how a...
Article
Full-text available
This research investigates the effects of applying different bond lengths for Carbon Fibre Reinforced Polymer (CFRP) strips used in flexural strengthening of steel I-beams. Wide range of the structural parameters i.e. load bearing capacity, failure mode, strain on CFRP, strain on adhesive, strain on steel beam, lateral deformation, and vertical def...
Book
ue to high enthusiasm of readers from the first volume of this book, authors have decided to publish the second volume to share more technical vocabularies. In this book, four important professional essays in the field of Civil and Structural Engineering are chosen; the technical vocabularies are extracted and detailed alphabetically. This book is...
Article
This paper reports the experimental and numerical investigations on the Carbon Fibre Reinforced Polymer (CFRP) failure analysis and structural behaviour of the CFRP flexural strengthened steel l-beams. Understanding the CFRP failure modes is useful to find solutions for preventing or retarding the failures. One non-strengthened control beam and twe...
Book
Nowadays, one of the requirements of each engineer is the knowledge of English technical vocabularies. In this book, some important professional essays in the field of Civil and Structural Engineering are chosen; the technical vocabularies are extracted and detailed alphabetically. This book can be used for engineers, lecturers, and students, both...
Article
Full-text available
In this paper, aluminum panels were used to improve the seismic behavior of the braced steel frames. One of the methods used to improve the seismic behavior of structures is the use of vertical links as energy dissipation systems. Aluminum has a low yielding stress and it yields faster than steel which results in a significant ductility. The invest...
Article
Full-text available
In this paper, the evaluation of a seismic strengthened low-rise steel structure which is a school in Mashhad City, Iran is investigated. The structure of the school was built in two stories steel structure. The structure was modelled by ETABS Ver.9.7.0 and evaluated using the standards prescribed by the instruction issued for building seismic stre...
Book
The use of Carbon Fibre Reinforced Polymer (CFRP) material for strengthening of steel structures has gained significant interests recently. There are various methods used for the strengthening of steel structures. Amongst them are the application of additional steel parts, external pre-stressing of parts, and reducing or bridging the gap between th...
Article
Full-text available
This paper presents the experimental and numerical studies on the carbon fibre reinforced polymer (CFRP) flexural strengthened steel I-beams. Eight steel beams were carefully chosen with the same length and different types and thicknesses of CFRP plates. Both experimental test and numerical simulation were employed. In the experimental test, the gr...
Conference Paper
Full-text available
This paper presents the experimental and numerical studies on the flexural strengthened steel I-beams by using Carbon Fiber Reinforced Polymer (CFRP) strips. Nowadays, strengthening existing steel structures by using CFRP has been widely interested. One of the common usages of CFRP to strengthen steel beams is the flexural upgrading. In this case,...
Article
This study reports the accuracies of Finite Element (FE) simulations, based on two and three dimensional (2D and 3D) modelling of strengthened steel I-beams in static linear and non-linear analyses. To investigate the effects of simulation modelling methods on the accuracy of the results, 28 computer and laboratory specimens were used. To strengthe...
Article
Full-text available
This paper reports the experimental studies on the local stiffening of steel I-beams by using Carbon Fiber Reinforced Polymer (CFRP) strips. One of the problems which frequently occur for steel section is the large local deformation under point loads. To study the effects of applying CFRP for local stiffening, four steel I-beams were selected and t...
Article
Full-text available
Normally, carbon fiber reinforced polymer (CFRP) strips have been used for flexural strengthening of steel beams, but in this research, application of CFRP strips as shear reinforcements was innovated. In this novel method, investigation on the requirement of applying CFRP on one or both sides of the web, and using different values of CFRP area on...
Article
Full-text available
Problems that frequently occur in carbon fibre reinforced polymer (CFRP) flexural strengthened steel structures include the peeling and debonding at the tip of the CFRP plate. This paper presents a study on the effectiveness of using steel plates and bolts as end-anchors to address these problems. Four steel I-beams were tested to failure. The firs...
Article
Full-text available
This research examines the effects of using CFRP strips and steel plates for flexural strengthening of composite bridge. Computer simulation is used and adopted from a computer program called ANSYS. The specimens are modeled in full 3D case, thus the concrete deck, concrete reinforcements, steel profile, steel plates, shear connectors, adhesive and...

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Projects

Projects (11)
Project
Goal: All Dear Colleagues – Collaborators and Their Laboratories are invited to attach to this project Their old, new, and future works or messages about any type of "Stability of Beams, Frames, and Trusses", i.e. elements, often thin-walled, losing their stability when are loaded not axially (like columns) but in a transverse plane to the elements' axes ... ... if any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the "Stability of Beams, Frames and Trusses" would be required), He needs to be a follower of a member ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... , ... if any Dear Colleague–Collaborator of the project wants to add other Colleagues, which work on the "Stability of Beams, Frames and Trusses" (at least the co/authorship of one work about the "Stability of Beams" would be required) ... - don't hesitate to invite them ... The main rules of our Project are as follows: 1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Beams, Frames, and Trusses" or a message about it, 2. every Colleague–Collaborator of our Project should follow each other, 3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other, 4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors, 5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 works of Collaborators of our Project, 6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility, 7. if any Colleague–Collaborator of our Project has a possibility to help to publish works (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project, 8. if any Colleague–Collaborator knows about a conference with "Stability of Beams, Frames, and Trusses" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ... I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed and cited ... , but somebody should do that ... All Dear Colleagues – Collaborators are invited to be added to the Stability of Structures’s Lab regarding the rules of the Lab: https://www.researchgate.net/lab/Stability-of-Structuress-Lab-Krzysztof-Murawski Faithfully Yours Krzysztof Murawski
Project
All Dear Colleagues–Collaborators and Their Laboratories are invited to attach to this project Their old, new, and future works or messages about the stability of plates, shells (cylindrical, spheral, conical, et cetera ... shells), and panels made of metals, composites, concrete, bricks (masonry), wood, et cetera ... in elastic, elastic-plastic and plastic states ... ... if any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the "Stability of Plates" would be required), He needs to be a follower of a member ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... , ... if any Dear Colleague–Collaborator of the Project wants to add other Colleagues, which work on the stability (at least the co/authorship of one work about the "Stability of Plates" would be required) ... - don't hesitate to invite them ... The main rules of our Project are as follows: 1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Plates" or a message about it, 2. every Colleague–Collaborator of our Project should follow each other, 3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other, 4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors, 5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 works of Collaborators of our Project, 6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility, 7. if any Colleague–Collaborator of our Project has a possibility to help to publish works (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project, 8. if any Colleague–Collaborator knows about a conference with "Stability of Plates" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ... I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed, and cited ... , but somebody should do that ... All Dear Colleagues – Collaborators are invited to be added to the Stability of Structures’s Lab regarding the rules of the Lab: https://www.researchgate.net/lab/Stability-of-Structuress-Lab-Krzysztof-Murawski Faithfully Yours Krzysztof Murawski