Browsing Civil & Architectural Engineering by Publication Date
Now showing items 41-60 of 659
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Flexural and interfacial behavior of externally bonded/ mechanically fastened fiber-reinforced polymer-strengthened reinforced concrete beams
( American Concrete Institute , 2014 , Article)The determination of structural behavior requires advanced numerical methods, of which results are substantiated by credible experimental findings. This research aims to create precise finite element models for fiber-reinforced ... -
Critical factors determining bid/no bid decisions of contractors in Qatar
( American Society of Civil Engineers (ASCE) , 2014 , Article)To bid or not to bid for construction projects is a crucial strategic decision for contractors' sustainability in the industry. The high complexity and uncertainty associated with such a decision-making process, which ... -
The fictitious force method for efficient calculation of vibration from a tunnel embedded in a multi-layered half-space
( Elsevier , 2014 , Article)This paper presents an extension of the Pipe-in-Pipe (PiP) model for calculating vibrations from underground railways that allows for the incorporation of a multi-layered half-space geometry. The model is based on the ... -
Characteristics of olive mill solid residue and its application in remediation of Pb2+, Cu2+ and Ni2+ from aqueous solution: Mechanistic study
( Elsevier , 2014 , Article)This study investigated the use of untreated olive mill solid residues (OMSR) as a solid extractant for Pb2+, Cu2+ and Ni2+ ions from aqueous solution. It was shown that the solution initial pH value affected the metal ... -
Uptake of Reactive Black 5 by pumice and walnut activated carbon: Chemistry and adsorption mechanisms
( Korean Society of Industrial Engineering Chemistry , 2014 , Article)The potential of using pumice and walnut wood activated carbon as low-cost adsorbents for the removal of the diazo dye Reactive Black 5 (RB5) from aqueous solutions was investigated. The Langmuir isotherm fit to the data ... -
Performance evaluation of full-scale sections of asphalt pavements in the State of Qatar
( American Society of Civil Engineers (ASCE) , 2014 , Article)The population and economy in the State of Qatar have been increasing in the past 5 years. Accordingly, traffic loading has also increased rapidly, which affected the performance of existing roads and highways. This high ... -
Recycling of Local Qatar’s Steel Slag and Gravel Deposits in Road Construction
( OMICS International , 2014 , Article)Every year, the State of Qatar generates about 400,000 tons of steel slag and another 500,000 tons of gravel as a result of steel manufacturing and washing sand, respectively. The two materials (by-products) are not fully ... -
Blind identification of the Millikan Library from earthquake data considering soil-structure interaction
( John Wiley & Sons, Ltd. , 2015 , Article)The Robert A. Millikan Library is a reinforced concrete building with a basement level and nine stories above the ground. Located on the campus of California Institute of Technology (Caltech) in Pasadena California, it is ... -
Modelling the degradation of vibration characteristics of reinforced concrete beams due to flexural damage
( John Wiley & Sons, Ltd. , 2015 , Article)This paper presents an improved crack model incorporating non-linearity of flexural damage in concrete to reproduce changes in vibration properties of cracked reinforced concrete beams. A reinforced concrete beam model ... -
Inexpensive strengthening technique for partially loaded reinforced concrete beams: Experimental study
( American Society of Civil Engineers (ASCE) , 2015 , Article)This paper constitutes a special importance for developing countries where an affordable trowel-based strengthening system is needed. This paper also provides an affordable strengthening solution when it is not possible ... -
Experimental determination of carbamate formation and amine protonation constants in 3-amino-1-propanol-CO2-H2O system and their temperature dependency
( Elsevier , 2015 , Article)The equilibrium constant for the formation of carbamate in 3-amino-1-propanol-CO2-H2O system was evaluated at different CO2 loadings, different temperature values, and different amine protonation constant. The studied ... -
An analytic network process condition assessment model for sewer pipelines
( Civil-Comp Press , 2015 , Conference Paper)As sewer pipelines age, the need for their upgrading, maintaining, and repairing arises. Simultaneously, inadequate sewer pipelines might lead to catastrophic failures. Thus, decision makers must have a detailed knowledge ... -
An integrated ANP and er condition assessment model for sewer pipelines
( International Society for Trenchless Technology , 2015 , Conference Paper)As sewer networks age, the need for their maintenance arises. Simultaneously, inadequate rehabilitation of sewer pipelines might cause catastrophic failures. Thus, municipalities worldwide must have a detailed knowledge ... -
Enhancement of multi-media filter performance using talc as a new filter aid material: Mechanistic study
( Elsevier , 2015 , Article)The potential of using a new filter aid, namely, talc to enhance the removal of particles in a multi-media filter was investigated. In the case of the nano-scale particles the running time was enhanced by 300. min at a ... -
A fouling suppression system in submerged membrane bioreactors using dielectrophoretic forces
( Elsevier , 2015 , Article)A novel method was developed to suppress membrane fouling in submerged membrane bioreactors. The method is based on the dielectrophoretic (DEP) motion of particles in an inhomogeneous electrical field. Using a real sample ... -
Quantifying morphology of sands using 3D imaging
( American Society of Civil Engineers (ASCE) , 2015 , Article)Particle morphology plays a significant role in influencing engineering behavior of granular materials. Surface texture, roundness, and sphericity represent distinct multiscale measures needed to fully describe particle ... -
A comparative study of the treatment of ethylene plant spent caustic by neutralization and classical and advanced oxidation
( Academic Press , 2015 , Article)The treatment of spent caustic produced from an ethylene plant was investigated. In the case of neutralization alone it was found that the maximum removal of sulfide was at pH values below 5.5. The higher percentage removal ... -
A mixed space-time and wavenumber domain model for predicting ground vibration from railway tracks
( National Technical University of Athens , 2015 , Conference Paper)In this paper, a mixed model for studying ground vibration generated from surface railway tracks is presented. A ballasted track with nonlinear resilient components is modelled in the time domain using the Finite Element ... -
Comparison of SimTraffic and VISSIM Microscopic Traffic Simulation Tools in Modeling Roundabouts
( Elsevier B.V. , 2015 , Conference Paper)Abstract SimTraffic and VISSIM are two microscopic traffic simulation tools that are capable of modeling arterial roads with signalized intersections and roundabouts. This study compares the performance of the two simulation ... -
Fatigue characterisation of full-scale pavements using viscoelastic continuum damage approach for qatar
( CRC Press/Balkema , 2015 , Conference Paper)The population and economy in Qatar have been expanding significantly in the past six years. Accordingly, Qatar is encountering huge development in infrastructure. The existing mix design methods have been developed in the ...