Papers by Abdeldjelil Belarbi
Experimental Mechanics, 2005
Laboratory tests and strain analyses were carried out to evaluate this transducer system. The res... more Laboratory tests and strain analyses were carried out to evaluate this transducer system. The results show that the system is effective in measuring internal strains of concrete members. It was then embedded in a reinforced concrete bridge deck in Macomb County, Michigan. Field tests were conducted to measure the strains in the deck under truck wheel load. The results were used to understand the deck's strain and stress behavior under truck wheel load.
<p><strong>Title</strong>: Seismic Simulation and Design of Bridge Columns unde... more <p><strong>Title</strong>: Seismic Simulation and Design of Bridge Columns under Combined Actions, and Implications on System Response (NEES-2005-0071)</p> <p><b>Year Of Curation: </b>2013</p> <p><b>Description: </b>"Bridge columns are subjected to combinations of actions and deformations, caused by spatially-complex earthquake ground motions, features of structural configurations and the interaction between input and response characteristics. Combined actions/loadings can have significant effects on the force and deformation capacity of reinforced concrete columns, resulting in unexpected large deformations and extensive damage that in turn influences the performance of bridges as vital components of transportation systems. These effects should be considered in earthquake analysis and design of bridges so that significant earthquake damage and severe disruption of transportation systems can be reduced. The objectives of the project are to develop a fundamental knowledge of the impact of combined actions on column performance and system response and to establish analysis and design procedures that include the impact at both the component and system levels. The objectives will be realized by integrating analytical and experimental research where physical tests are driven by analyses and simulations that examine the system response of various bridge types under different loading conditions. The analytical models are calibrated by experimental data and then extended to system response. The experimental program includes quasi-static testing of twenty-four large columns (fourteen will be funded by NEES) providing fundamental behavior including the impact of torsional moments at University of Missouri, Rolla (UMR), pseudo-dynamic testing of three large and four small scale columns with variable axial load, within a bridge system simulation, at the University of Illinois at Urbana-Champaign (UIUC), real-time dynamic testing of eight large scale c [...]
At 18:44 UTC (19:44 local time) on May 21, 2003, a strong, shallow earthquake of Moment Magnitude... more At 18:44 UTC (19:44 local time) on May 21, 2003, a strong, shallow earthquake of Moment Magnitude (M) 6.8 shook northern Algeria and caused damage in five provinces in the north-central section of the country. Damage was reported over an area about 100 km long and 35 km wide, centered on the city of Boumerdes. The hardest hit areas were in the coastal province of Boumerdes, mainly in the cities of Boumerdes, Zemmouri and Thenia. The earthquake appears to have been generated by an offshore south-dipping thrust fault oriented N54°E extending for about 35 km from Dellys to Corso. The fault rupture was bilateral, with a greater asymmetry to the southwest. The ground motions recorded from the mainshock were significantly higher than median values predicted by standard attenuation relationships. Liquefaction and lateral spreading occurred near the Isser River and areas with extensive beach sand deposits. In the port of Algiers, nine piers suffered damage where liquefaction, loss of ground support, and lateral displacement (seaward movements) of the bulkheads were pervasive. Cracks developed on the Keddara and Beni Amrane Dams and the water line running from the Keddara Dam to the Boudouaou water treatment plant suffered damage at two locations. * Printed with permission of the Earthquake Engineering Research Institute. Originally published as a chapter in the EERI Boumerdes, Algeria Reconnaissance Report.
Engineering mechanics, 1996
The main objective of this study was to develop a new type of fiber reinforced plastic (FRP) reba... more The main objective of this study was to develop a new type of fiber reinforced plastic (FRP) rebar with focus on ductility and health-monitoring issues. One approach to provide ductility was the use of a hybrid FRP reinforcing bar consisting of different types of fibers, which fail at different strains during the load history of the rebar, thereby allowing a gradual failure of the rebar. The manufacturing of the rebar was achieved by pultrusion and filament winding techniques. These techniques have made it possible to embed fiber optic sensors within the reinforcement, for health monitoring, thus protecting the sensor from the harsh concrete environment. Pseudo-ductile behavior was validated through testing of coupon FRP rebar as well as reinforced concrete beams. Testing of large-scale beams reinforced with the hybrid FRP rebar exhibited remarkable ductility behavior with ductility indices close to that of beams reinforced with steel rebar. Furthermore, the strain measured from the...
Engineering Structures, 2019
Under design level earthquakes, reinforced concrete (RC) bridge columns subjected to combined lat... more Under design level earthquakes, reinforced concrete (RC) bridge columns subjected to combined lateral and torsional loadings have been shown to behave considerably different from bridge columns subjected to lateral loading alone. This is caused by the interaction between lateral and torsional loadings. Thus, modeling of RC columns under combined loading including torsion has been a focus in the recent literature. However, very few techniques have been reported on the use of general finite element software to simulate these columns under cyclic loadings. To fill in this gap, this study employed a truss modeling technique to simulate the response of RC bridge columns subjected to a constant axial compression and reversed cyclic lateral loading including torsion. The column was modeled as a three-dimensional truss composed of longitudinal, transverse, and diagonal truss elements to represent the contributions of longitudinal reinforcement and/or concrete, transverse reinforcement, and diagonal concrete struts to the global behavior of the column. A parametric study was conducted to determine the inclination angle and thickness of the diagonal struts in the truss model to properly predict the behavior of the column. The analysis results of three unstrengthened (i.e., as-built) RC columns and two columns that were repaired with carbon fiber reinforced polymer (CFRP) jackets were compared with experimental results of the corresponding columns, which showed both the efficiency and accuracy of the proposed modeling technique in terms of stiffness, strength, deformation, and energy dissipation. Recent efforts have been focused on developing techniques to model the response of RC bridges subjected to combined loadings. Different authors have modeled RC columns as either solid elements or beamcolumn elements with fiber sections incorporating the interaction among axial load, flexural moment, shear, and torsional moment [7,10,11-13]. Solid element models have been generated using general finite element software such as DIANA [14], ABAQUS [15], or ANSYS [16] and can predict damage to concrete under combined loadings with implemented failure criteria; however, analysis of solid element models usually requires significant computational effort for reversed cyclic nonlinear analysis, even for an individual column member (e.g., 96 h of parallel computation with 12 processors as reported by Alemdar et al. [11]), which is unattractive for simulation of an entire bridge system under multiple earthquake loadings in performance-based assessment that usually involves a set of thousands of nonlinear analyses [17]. Beam-column elements incorporating the interaction of axial load,
Structural Engineering and Mechanics, 2007
A new numerical model based on the spline finite strip method is presented here for the analysis ... more A new numerical model based on the spline finite strip method is presented here for the analysis of buckling of built-up columns with and without end stay plates. The channels are modelled with spline finite strips while the connecting elements are represented by a 3D beam finite element, for which the stiffness matrix is modified in order to ensure complete compatibility with the strips. This numerical model has the advantage to give all possible failure modes of built-up columns for different boundary conditions. The end stay plates are also taken into account in this method. To validate the model a comparative study was carried out. First, a general procedure was chosen and adopted. For each numerical analysis, the lowest buckling loads and modes were calculated. The basic or "pure" buckling modes were identified and their critical loads were compared with solutions obtained using analytical methods and/or other numerical methods. The results showed that the proposed numerical model can be used in practice to study the elastic buckling of built-up columns. This model is considered accurate and efficient for the local buckling of short columns and global buckling for slender columns.
This paper investigates the performance-based evaluation of reinforced concrete (RC) bridge circu... more This paper investigates the performance-based evaluation of reinforced concrete (RC) bridge circular columns under combined bending, shear, axial, and torsion using decoupled damage index models. The main feature of the proposed damage index model is the feasibility of decoupling these combined actions according to various damage limit states. Research has shown that under combined bending, shear, axial, and torsion loads, the main parameters in the structural performance of RC bridge columns that are affected the most are their strength, deformation capacity, and failure mode. Response of RC columns under these combined actions is very complex and requires the implementation of numerical tools that can quantify the progressive nature of damage under the influence of various parameters. A proper damage index should thus include the main parameters that describe the hysteretic behavior under these combined loadings. Existing damage index models are modified to account for these combined actions in a decoupled scenario which are then used to evaluate the progression of damage under the combined loads. Under combined loads damage limit states that can be identified are flexural and/or shear/torsion cracking, yielding of transverse and/or longitudinal reinforcement, spalling of concrete cover, and fracture of transverse and longitudinal reinforcement. The main variables that are considered in the study to characterize the damage index are (i) the ratio of torsion-to-bending moment (T/M) for circular columns and twist-to-displacement (q/D) for square columns, (ii) the level of detailing for high and moderate seismicity (low or high transverse reinforcement ratio) and (iii) level of shear (low or moderate). Progression of damage in RC columns due to the interaction between bending and torsion is also evaluated as a function of the transverse reinforcement ratio. Results show that the columns’ lateral displacement ductility as well as its torsion rotation ductility are decreased under combined loads. The progression of damage is found to be amplified due to the effects of torsion. An important observation from this study that can have a significant impact in the seismic design of RC columns under combined loads is that an increase in the transverse reinforcement ratio helps delay the progression of damage, thereby changing the response of the columns from a torsional response to a predominately flexural response.
Journal of Professional Issues in Engineering Education and Practice, 2008
ABSTRACT This paper describes a partnership between the University of Missouri-Rolla and the Univ... more ABSTRACT This paper describes a partnership between the University of Missouri-Rolla and the Universite Abou-Bekr Belkaid de Tlemcen in Algeria in order to support the development of programs of instruction and faculty training in Algeria in the areas of engineering and construction management in order to create a self-sustaining educational infrastructure in Algeria. Specifically, the partnership aims to provide educational and technical assistance to Algeria in order for them to develop: (1) new graduate programs in engineering and construction management and (2) modern teaching methodologies including Internet and distance learning. Objectives of the partnership were to provide engineering and construction management skills and expertise in order to achieve international standards in the management area. The desired impact is summarized in terms of the ability to identify operations problems and implement solutions for improved strategic competitiveness, make sound decisions, plan, and control the key resources of an organization-money and people, critically analyze, evaluate, improve, or adapt existing technical and managerial systems, design and develop new technical and managerial systems, and coordinate different projects with a better harmony and cost effectiveness. The long-term expected outcomes of the partnership are Algerian faculty with strong backgrounds in engineering and construction management, a self-sustained learning environment for Algerian institutions, including engineering management and construction management graduate programs, continuing education, and short courses, and Internet-based multimedia teaching material for collaboration between the Algerian institutions and local industry.
Journal of Intelligent Material Systems and Structures, 2010
This work discusses a laboratory resource and associated lecture material that are implemented in... more This work discusses a laboratory resource and associated lecture material that are implemented in an interdisciplinary course ‘Smart Structures and Sensors.’ Instruction in structural behavior, sensor systems, and experimental systems issues is supported. The Smart Truss Bridge is a reconfigurable aluminum truss structure that is instrumented with strain sensors. It is designed to be representative of a full-scale steel bridge such that person loads produce reasonable strain levels. This multiple-bay truss can be configured with and without redundant members. Strain instrumentation with extrinsic Fabry-Perot Interferometric fiber optic sensors demonstrates the performance and use of sensor systems. Theoretical analysis and experimental measurement may be correlated for different load placements. Observations include elastic strain behavior as well as practical experimental issues such as noise and non-ideal connections. A smart structures case study shows the use of artificial neura...
Engineering Structures, 2009
His research interests include ductility, recycling, strengthening, plasticity and shear of reinf... more His research interests include ductility, recycling, strengthening, plasticity and shear of reinforced eco-friendly concrete structures.
2008 Concrete Bridge …, 2008
Abstract: Reinforced Concrete (RC) bridge columns are subjected to a combined axial, bending, she... more Abstract: Reinforced Concrete (RC) bridge columns are subjected to a combined axial, bending, shear and torsional loading during earthquake excitations. This fact is particularly true for skewed and curved bridges, and bridges with unequal spans or column heights. In ...
14 th World Conference on …, 2008
1PhD Candidate, 2Distinguished Professor, Department of Civil,Envirn, and Archictectural Engineer... more 1PhD Candidate, 2Distinguished Professor, Department of Civil,Envirn, and Archictectural Engineering Missouri University of Science and Technology, Rolla, Missouri, USA. 3Associate Professor, Department of Civil and Environmental Engineering University of Houston, ...
Proc. of the 14th World Conference on …, 2008
Reinforced concrete (RC) bridge columns can be subjected to torsional moments in addition to flex... more Reinforced concrete (RC) bridge columns can be subjected to torsional moments in addition to flexure, axial, and shear forces during earthquake excitations. The addition of torsion is more likely in skewed and horizontally curved bridges, bridges with unequal spans or column heights, and bridges with outrigger bents. This combination of loadings with including torsion can result in complex flexural and shear failure of these bridge columns. An experimental study is being conducted to understand the behavior of RC circular columns under combined loadings. The main variables being considered are (i) the ratio of torsion to bending moment (T/M), (ii) the ratio of bending moment to shear (M/V), and (iii) level of detailing for high and moderate seismicity (low or high spiral ratio). The first phase of the study consisted of testing circular columns with high aspect ratio (height/diameter). The results of the five columns tested under cyclic pure bending, cyclic pure torsion, and various levels of combined cyclic bending and torsion respectively are presented in this paper. The effects of combined loading on the hysteretic load-deformation response, spiral and longitudinal reinforcement strain variations, and plastic hinge characteristics are discussed. Normalized interaction diagrams for bending and torsion based on the test results are presented and discussed. The significance of proper detailing of transverse reinforcement and its effect on the torsional resistance under combined loadings is also highlighted. Based on the test results, it is concluded that the flexural as well as torsional capacity is decreased due to the effect of combined loading and there is also a change in the failure mode and deformation characteristics.
ACI Structural Journal, 2001
Abstract: The south connector bridge in the Interstate 5/State Route 14 interchange failed during... more Abstract: The south connector bridge in the Interstate 5/State Route 14 interchange failed during the 1994 Northridge earthquake because of concentration of shear forces in the short columns near the abutments. In the replacement bridge, the column heights were made ...
Discussion is welcomed for all materials published in this issue and will appear ten months from ... more Discussion is welcomed for all materials published in this issue and will appear ten months from this journal's date if the discussion is received within four months of the paper's print publication. Discussion of material received after specified dates will be considered individually for publication or private response. ACI Standards published in ACI Journals for public comment have discussion due dates printed with the Standard. The Institute is not responsible for the statements or opinions expressed in its publications. Institute publications are not able to, nor intended to, supplant individual training, responsibility, or judgment of the user, or the supplier, of the information presented. The papers in this volume have been reviewed under Institute publication procedures by individuals expert in the subject areas of the papers.
Advanced composite materials, specifically fiber reinforced polymers (FRPs) from carbon, glass or... more Advanced composite materials, specifically fiber reinforced polymers (FRPs) from carbon, glass or aramid, have a wide range of application in current civil engineering practice. Particularly, their use as reinforcing bars or prestressing tendons in reinforced concrete structures is quite promising. However, inherent characteristic differences compared to traditional steel reinforcement entail a different treatment of these materials compared to steel. As a matter of fact, the lack of comprehensive design specifications hinders the advancement of this emerging field. In this paper, available literature related to CFRP prestressed concrete bridges are reviewed and all relevant information from available sources is synthesized. A database of experimental studies conducted so far with details of testing programs is compiled and the gaps related to design of CFRP prestressed concrete bridge beams are identified. Available relevant design guidelines from all around the world with a focus ...
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Papers by Abdeldjelil Belarbi