Civil and Environmental Engineering: المرسلات الحديثة
السجلات المعروضة 601 -- 620 من 851
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Effectiveness of Fabric-Reinforced Cementitious Matrix in Strengthening Reinforced Concrete Beams
( American Society of Civil Engineers (ASCE) , 2017 , Article)This paper reports on the efficiency of fabric-reinforced cementitious matrix (FRCM) in enhancing the flexural capacity and deformational characteristics of RC beams. In the main experimental part of the paper, 12 RC beams, ... -
Fuzzy Structural Equation Model to Assess Construction Site Safety Performance
( American Society of Civil Engineers (ASCE) , 2017 , Article)The main goal of this study is to examine the relationships between determinants of safety performance of construction sites. To achieve this goal, 168 observable variables and 16 latent dimensions that affect safety ... -
FRP/stirrups interaction of shear-strengthened beams
( Kluwer Academic Publishers , 2017 , Article)This work includes experimental testing and finite element analysis of fiber reinforced polymer (FRP) shear-strengthened reinforced concrete (RC) beams. The strengthening techniques used for the beam strengthening are ... -
Proposed formulas for estimating splitting tensile, shear and flexural strengths, and long term deflection assessment of self-compacting concrete elements
( American Scientific Publishers , 2017 , Article)This paper investigated the splitting tensile and shear strengths and the modulus of rupture of Self Compacting Concrete (SCC) elements with fly ash, micro silica and polycarboxylate ether superplasticizer for various ... -
Parametric study on moment redistribution of fiber reinforced concrete continuous beams with basalt FRP bars
( Qatar University Press , 2020 , Poster)The state of Qatar is suffering from its harsh environment and coastal conditions which stand for most of the year. As a result, steel-reinforced concrete structures are subjected to rapid corrosion and deterioration. ... -
Nonexplosive Deconstruction of Steel Girder Highway Bridges
( American Society of Civil Engineers (ASCE) , 2017 , Article)While the transportation system of the United States rapidly ages and expands, there is increasing demand for the demolition, replacement, modification, or rehabilitation of existing bridges; all of these actions require ... -
A semi-analytical beam model for the vibration of railway tracks
( Academic Press , 2017 , Article)The high frequency dynamic behaviour of railway tracks, in both vertical and lateral directions, strongly affects the generation of rolling noise as well as other phenomena such as rail corrugation. An improved semi-analytical ... -
Analysis of change orders in Qatari construction projects
( Taylor and Francis Ltd. , 2017 , Article)Change orders affect the performance of construction projects and may induce significant cost overruns. The paper identifies the main causes/factors that lead to change orders in Qatari construction projects. It also ... -
TORT3D: A MATLAB code to compute geometric tortuosity from 3D images of unconsolidated porous media
( Elsevier B.V. , 2017 , Article)Tortuosity is a parameter that plays a significant role in the characterization of complex porous media systems and it has a significant impact on many engineering and environmental processes and applications. Flow in ... -
Different FRCM systems for shear-strengthening of reinforced concrete beams
( Elsevier Ltd , 2017 , Article)This paper presents the results of an extensive experimental study on the efficacy of different fabric-reinforced cementitous matrix (FRCM) systems for the strengthening of reinforced concrete (RC) beams, which are critical ... -
Aging evaluation of asphalt samples with Low Field Nuclear Magnetic Resonance
( Elsevier Inc. , 2017 , Article)In this study, a recently developed methodology to assess aging of pavements by using Low Field Nuclear Magnetic Resonance (LF-NMR) was applied to asphalt mix samples at different aging states. The ultimate objective of ... -
Assessment of abnormally low tenders: a multinomial logistic regression approach
( Taylor and Francis Ltd. , 2017 , Article)This study was performed in order to reveal factors affecting abnormally low tenders (ALTs) and to minimize negative effects of them. A thorough literature review was carried out to observe past research about the reasons ... -
Effect of ageing on asphalt binders in the State of Qatar: a case study
( Taylor and Francis Ltd. , 2017 , Article)Ageing of asphalt binders has a significant impact on the rheological properties of asphalt binders and thus affects the performance of asphalt pavements. The rate of binder ageing is accelerated at high temperatures. This ... -
Effect of corrosion damage on the flexural performance of RC beams strengthened with FRCM composites
( Elsevier Ltd , 2017 , Article)This paper reports on the flexural behavior of corrosion-damaged reinforced concrete (RC) beams strengthened with different fabric-reinforced cementitious matrix (FRCM) composites. Three groups of beams were subjected to ... -
Cost based Value Stream Mapping as a sustainable construction tool for undergraound pipeline construction projects
( MDPI AG , 2017 , Article)This paper deals with application of Value Stream Mapping (VSM) as a sustainable construction tool on a real construction project of installation of underground pipelines. VSM was adapted to reduce the high percentage of ... -
Sustainable riverscape preservation strategy framework using goal-oriented method: Case of historical heritage cities in Malaysia
( Elsevier B.V. , 2017 , Article)Rapid development and transformation are the main causes for declining urban natural landscapes as well as its physical and environmental qualities. Currently, rehabilitation and preservation actions cause tough pressures ... -
Modeling and Parametric Study of the Reanchorage of Ruptured Tendons in Bonded Posttensioned Concrete
( American Society of Civil Engineers (ASCE) , 2017 , Article)The contribution of ruptured tendons to the residual strength of bonded posttensioned concrete structures is currently assessed based on pretensioned concrete bond models. However, this approach is inaccurate due to the ... -
Synthesis and characterization of cobalt hydroxide carbonate nanostructures
( Royal Society of Chemistry , 2017 , Article)Battery-type electrodes of three-dimensional (3D) hierarchical cobalt hydroxide carbonate arrays on Ni foam were fabricated using a hydrothermal method for use in supercapacitors. X-ray diffraction analysis, scanning ... -
Temporal variation in walking behavior: An empirical study
( Elsevier Ltd , 2017 , Article)This study provides a baseline for understanding the variation in walking behavior with respect to seasonal conditions in a hot weather country in the Arabian Gulf region. A busy neighborhood with different land-use patterns ... -
Ground-borne vibrations due to railway traffic in urbanized areas: A numerical study about traffic in trench cross-sections
( National Technical University of Athens , 2017 , Conference Paper)Modern cities require efficient mass transportation systems like subway and railway networks. Due to the lack of available space and also due to environmental concerns, it is usually preferable to use the underground space ...
