Abdolrahim Taheri

Abdolrahim Taheri
Petroleum University of Technology | PUT

B.Sc., M.Eng.Sc., PhD
Offshore Structures, Risk and Reliability, Data Science with Python

About

36
Publications
10,006
Reads
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67
Citations
Citations since 2016
30 Research Items
62 Citations
201620172018201920202021202202468101214
201620172018201920202021202202468101214
201620172018201920202021202202468101214
201620172018201920202021202202468101214
Introduction
Dr Abdolrahim Taheri currently works at the Department of Offshore Structural Engineering, Petroleum University of Technology. Abdolrahim does research in Civil Engineering, Ocean Engineering and Structural Engineering.
Additional affiliations
September 2014 - present
Petroleum University of Technology
Position
  • Professor (Assistant)
Description
  • Risk@Reliability; Design of Offshore Structures; Risk@Reliability; Earthquake Engineering;
Education
November 2008 - February 2012
University College Dublin
Field of study
  • Structural Dynamics
October 2001 - September 2004
September 1997 - September 2001
University of Tehran
Field of study
  • Civil Engineering

Publications

Publications (36)
Article
Offshore platforms are among important structures whose performance during their life-time and beyond is of significant importance. One of the approaches for ensuring a platform’s fitness-for-purpose condition is the structural integrity management system. In this process, a wide range of risk assessment approaches can be carried out to investigate...
Conference Paper
Full-text available
A near-vertical marine riser is a cylindrical pipe of an offshore platform that provides the connection between the wellhead on the seabed and the facilities on the platform to transmit the fluids and the equipment. A near-vertical riser is usually called a top tensioned riser. It involves a tensioning system to maintain its angles at the top and t...
Article
Full-text available
Today, Iran's oil and gas industry requires maintenance, repair, renovation, and reconstruction methods for the existing platforms. It is essential to discuss the repair of offshore platforms since they mostly have been in service beyond their design lives and subjected to damages mentioned in the following. Furthermore, offshore platforms' increas...
Article
Different parameters contribute on the upheaval buckling of subsea pipelines. Seabed is a surface that pipeline contact with it directly. So seabed is one of the most important parameters in the upheaval buckling of subsea pipeline. Subsea pipeline includes imperfection shape and characteristics of the seabed soil. In this paper, different soil typ...
Article
Full-text available
Subsea pipelines are used to transport gas and oil around the world. Oil is transported through subsea pipelines at high pressure and high temperature to smooth the way for its flow and to prevent its solidification. The present paper assesses a pipeline located in South Pars Gas Field against lateral buckling. As more and more pipelines operate at...
Article
API RP2A WSD is a design code in practice for design of jacket platforms in the Persian Gulf but is based on the Gulf of Mexico environmental condition. So for the sake of using this code for the Persian Gulf, it is better to perform a calibration based on this specific region. Analysis and design of jacket platforms based on API code are performed...
Article
Full-text available
The importance of oil transportation in the maritime industry has increased in recent years due to increased oil and gas production. According to technical and financial aspects, on hydrocarbon transfer methods, the pipelines are the best option for the transfer of oil and gas in the maritime industry. High temperature and high pressure in the pipe...
Article
In recent years, the production of oil and gas has been developed in deep water depths which exceed 500m. Deep water developments are being followed strongly in different parts of the world (Caspian Sea, Gulf of Mexico, etc.). The movement of floater causes severe stress at the touchdown point (TDP) in steel catenary risers (SCR). The main objectiv...
Article
Full-text available
The International Roughness Index (IRI) is widely accepted as a measure of pavement condition. However it was developed as an indicator of passenger comfort as they travel in a vehicle on the pavement. In this paper, for the assumed failure model adopted, IRI is not found to be a good indicator of remaining pavement service life. The 3D continuous...
Article
Full-text available
Fixed offshore structures are considered as an important structure in shallow water. Iranian oil and gas offshore structures which have been located in Persian Gulf are mostly fixed jacket. So reliability assessment of these kind of marine structures seems to be very important and is an essential part of offshore structure design. Mont Carlo is a p...
Article
Full-text available
Free-span occurs normally in a pipeline at uneven seabed, dynamic seabed and pipeline crossing. Free spanning in pipeline causes Vortex Induced Vibration (VIV) fatigue, fracture and bursting. In this paper, a pipeline located in South Pars Gas Field is assessed against local buckling and VIV fatigue using probability of failure theory based on the...
Article
Fatigue has long been recognized as an important consideration for designing offshore structures and intensive cooperative industry research on tubular joints. In this paper, fatigue life assessment for welded tubular joints of aging fixed platforms is numerically assessed as part of mitigation for platform lifetime. The current paper focuses on di...
Article
Full-text available
A steel catenary riser (SCR) attached to a floating platform at its upper end encounters fluctuations in and near its touchdown zone (TDZ), which causes the interaction with the seabed. Subsea surveys and the analysis of SCR’s indicated that the greatest stress and highest damage occurred near the touchdown point (TDP), where the SCR first touches...
Article
Full-text available
The study about the jacket platforms in the past has revealed that the most of the collapse failures occur due to the lack of strength of the pile foundation. However, when the jacket platforms which have been collapsed due to extreme condition were looked into, it was found that most of them had their foundations intact. These contrasting facts ca...
Article
Reliability of free spanning subsea pipeline has been estimated using theory of Probability of Failure (POF) and has been analyzed in accordance with a target safety level. The POF has been calculated using First-Order Reliability Method (FORM) and Monte-Carlo Sampling (MCS). The changes in POF with regard to six different ratios of span length to...
Conference Paper
Full-text available
Top tensioned risers (TTRs) are used to connect a vessel to a subsea system on the sea floor, and are equipped with a tension system to avoid large bending moments to occur and maintain the angles at top and bottom of the riser when exposed to environmental loading. The purpose of this paper is to investigate the effects of bending stiffness, top t...
Article
This paper investigates the integrated riser/vessel system which is subjected to random waves. Riser pipelines are the main components of the oil and gas offshore platforms. Whereas Iran country has been located on the fringes of Caspian Sea deep water, therefore study and research in this area is increasingly essential. The fluctuation of floating...
Article
Full-text available
In offshore structures, most of failures are caused by the lack of sufficient piles strength. Scour phenomena affects the load transition and the pile strength. The necessity of the consideration of scouring phenomena amplifies when the scour depth becomes remarkable, which can endanger the jacket stability. In this paper, a new method is used to c...
Conference Paper
Full-text available
خستگی یکی از خرابی های رایج در بین سازه های فراساحلی به شمار می رود که به مرور زمان در اثر بارهای تکراری نظیر موج، جریان و باد ایجاد می گردد. این پدیده به علت تمرکز تنش زیاد در محل اتصالات اعضای سکو، محسوس تر است. در این مقاله تحلیل و ارزیابی خستگی برای اتصالات لوله ای یک سکوی پایه ثابت جکت موجود در خلیج فارس انجام شده است. سکوی مورد مطالعه، یک سکو...
Conference Paper
Offshore environment requires special design criterion to be considered because of the existing loadings on the platforms and structures. The nature of these loadings are random and cyclic. These fact necessitates the fatigue criterion to be considered and satisfied during the design stage. One of the most exposed structures is the riser of the pla...
Article
Full-text available
Offshore platforms are in a rough environmental condition and therefore structural damages are undeniable for the aging platforms. These structural damages, which are the results of fatigue, corrosion and other unavoidable events, reduce the stiffness of the structure. When the stiffness of the structure decrease, the dynamic response of the struct...
Conference Paper
Full-text available
Nowadays there is more need for oil and gas exploration and production activities in deepwaters. This necessitates more modern technologies and deep studies on deepwater environmental conditions and relevant challenges. The main subjects faced to these challenges are offshore equipments, specially the riser systems. Steel Catenary Riser is a prefer...
Article
Full-text available
Offshore jacket structures have been used in petroleum industry for decades. Due to increasing the age of operating platforms, structural damages will be generated by corrosion, fatigue, ship impacts and other reasons. Improvements in the oil and gas recovery from several fields have raised the interest for using these platforms well beyond their i...
Conference Paper
Full-text available
Marine risers are the main components of the drilling and extraction of oil and gas in the offshore platforms. Hence the study of the riser lines under the specific environmental and loading conditions is mandatory to achieve optimal design of offshore oil platform. Future production of oil and gas will to a large extent take place in water depths...
Article
Full-text available
A road develops permanent deformation or fatigue damage because of the stress and strain induced in its structure by surface loading and environmental change. Dynamic tyre forces generated by the vibration of moving heavy vehicles excited by the road surface profile are strongly influenced by vehicle speed and dynamic properties. A mechanistic-empi...
Article
Full-text available
This paper proposes a mechanistic-empirical pavement damage model to predict changes in 3D road profiles due to dynamic axle loads. The traffic is represented by a fleet of quarter cars which allows for statistical variability in model parameters such as velocity, suspension stiffness, suspension damping, sprung mass, unsprung mass and tyre stiffne...
Article
Full-text available
This paper proposes a mechanistic-empirical pavement damage model to predict changes in 3-dimensional road profiles due to dynamic axle loads. The traffic is represented by a fleet of quarter cars which allows for statistical variability in model parameters such as velocity, suspension stiffness, suspension damping, sprung mass, unsprung mass and t...

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Projects

Projects (8)
Project
Elimination of the simplifications involving VIV, nonlinearities, degrees of freedom of the platforms or vessels, etc.
Project
The aim of this project is to apply structural integrity management (SIM) process on offshore jacket structures located in the Persian Gulf