Investigating Pipeline–Soil Interaction Under Axial–Lateral Relative Movements In Sand,
2011
Memorial University of Newfoundland
Investigating Pipeline–Soil Interaction Under Axial–Lateral Relative Movements In Sand, Nasser Daiyan, Shawn Kenny, Ryan Phillips, Radu Popescu
Architectural Engineering
This paper presents results from an experimental and numerical study on the axial–lateral interaction of pipes with dense sand. A series of centrifuge tests were conducted, with a rigid pipeline displaced in the horizontal plane in a cohesionless test bed. The relative pipe–soil interaction included axial, lateral, and oblique loading events. A three-dimensional continuum finite element model was developed using ABAQUS/Standard (Hibbitt et al. 2005) software. The numerical model was calibrated against experimental results. A parametric study was conducted, using the calibrated finite element model to extend the investigations. The ultimate axial and lateral soil loading was found …
Mixing Numbers And Letters: Collaboration Between Engineering And English To Improve Graduate Student Work,
2011
California Polytechnic State University - San Luis Obispo
Mixing Numbers And Letters: Collaboration Between Engineering And English To Improve Graduate Student Work, Craig Baltimore, Deborah Wilhelm, Mary Forte, Pamalee Brady
Architectural Engineering
This paper will describe the issues and process of developing an introductory course in graduate writing and communication skills in conjunction with the industry of professional consulting engineering. The course was developed through a collaboration of English and engineering faculty and the collaboration is maintained in the teaching of the course. Innovative techniques incorporated into the course development include a four-pronged approach: 1) use of best practices for Writing in the Disciplines; 2) development of and focus on a multi-faceted collaborative model (Engineering and English, university and industry, students and faculty, industry and students); 3) team-teaching by engineering and English …
Longitudinal Evaluation Of A Gis Laboratory In A Transportation Engineering Course,
2011
Missouri University of Science and Technology
Longitudinal Evaluation Of A Gis Laboratory In A Transportation Engineering Course, Ghulam H. Bham, Dan Cernusca, Ronaldo Luna, Uday R.R. Manepalli
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
This paper focuses on the potential impact of student-centered feedback for enhancing the learning experience of civil engineering students that used a geographic information system (GIS) based tutorial in a transportation engineering course. the tutorial was implemented in a laboratory environment developed as a self-guided activity supported by a web-Based learning system. the formative research proposed in this study includes a series of four successive implementations of this laboratory. Students' performance, beliefs, and perceptions were monitored by using a mixed methods design approach and weaknesses identified from early implementations were addressed before the next implementation of the laboratory activity. the …
Monitoring The Early-Age Hydration Of Self-Compacting Concrete Using Ultrasonic P-Wave Transmission And Isothermal Calorimetry,
2011
Missouri University of Science and Technology
Monitoring The Early-Age Hydration Of Self-Compacting Concrete Using Ultrasonic P-Wave Transmission And Isothermal Calorimetry, Bram Desmet, Kelly Chrysanthe Atitung, Miguel Angel Abril Sanchez, John Vantomme, Dimitri Feys, Nicolas Robeyst, Katrien Audenaert, Geert De Schutter, Veerle Boel, Gert Heirman, Özlem Cizer, Lucie Vandewalle, Dionys Van Gemert
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Early-Age Hydration (B48 H) of a Series of Self-Compacting Concretes and Corresponding Mortars and One Traditionally Vibrated Concrete and Mortar is Monitored in a Continuous Way using Ultrasonic Testing and Isothermal Calorimetry. the Mixtures Differ in Type of Mineral Addition, Superplasticizer, Cement, Cement-To-Powder Ratio and Water-To-Powder Ratio. the Influence of These Different Mixture Compositions on the Kinetics of the Hydration during the First Days of the Hydration is Characterized by the Heat Production Rate Q and the Evolution of the P-Wave Velocity, which is a Consequence of the Microstructural Changes. the Variations in the Acceleration Caused by Mineral Additions …
Direct Shear Tests On Jsc-1a Lunar Regolith Simulant,
2011
Missouri University of Science and Technology
Direct Shear Tests On Jsc-1a Lunar Regolith Simulant, Masafumi Iai, Ronaldo Luna
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
A series of direct shear tests were conducted on the JSC-1A lunar regolith simulant in a 101.6-mm- (4-in.-) diameter container. the direct shear test provides a unique mode of failure that aids the development of excavation tools for the Moon. Relative density and normal load were varied to study the strength behavior of such granular material at peak and critical state conditions. the values of the internal friction angle ranged from 30 to 70. a relationship between the internal friction angle of the direct shear and the published triaxial compression test results is presented. Additionally, the measured dilatancy angle is …
Remote Sensing Of Soil Moisture Using Airborne Hyperspectral Data,
2011
Missouri University of Science and Technology
Remote Sensing Of Soil Moisture Using Airborne Hyperspectral Data, Michael Finn, Mark Lewis, David Bosch, Mario Giraldo, Kristina Yamamoto, Dana Sullivan, Russell Kincaid, Ronaldo Luna, Gopala Allam, Craig Kvien, Michael Williams
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Landscape assessment of soil moisture is critical to understanding the hydrological cycle at the regional scale and in broad-scale studies of biophysical processes affected by global climate changes in temperature and precipitation. Traditional efforts to measure soil moisture have been principally restricted to in situ measurements, so remote sensing techniques are often employed. Hyperspectral sensors with finer spatial resolution and narrow band widths may offer an alternative to traditional multispectral analysis of soil moisture, particularly in landscapes with high spatial heterogeneity. This preliminary research evaluates the ability of remotely sensed hyperspectral data to quantify soil moisture for the Little River …
Phytoscreening For Chlorinated Solvents Using Rapid In Vitro Spme Sampling: Application To Urban Plume In Verl, Germany,
2011
Missouri University of Science and Technology
Phytoscreening For Chlorinated Solvents Using Rapid In Vitro Spme Sampling: Application To Urban Plume In Verl, Germany, Matt A. Limmer, Jean Christophe Balouet, Frank Karg, Don A. Vroblesky, Joel Gerard Burken
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Rapid Detection and Delineation of Contaminants in Urban Settings is Critically Important in Protecting Human Health. Cores from Trees Growing above a Plume of Contaminated Groundwater in Verl, Germany, Were Collected in 1 Day, with Subsequent Analysis and Plume Mapping Completed over Several Days. Solid-Phase Microextraction (SPME) Analysis Was Applied to Detect Tetrachloroethene (PCE) and Trichloroethene (TCE) to Below Nanogram/liter Levels in the Transpiration Stream of the Trees. the Tree Core Concentrations Showed a Clear Areal Correlation to the Distribution of PCE and TCE in the Groundwater. Concentrations in Tree Cores Were Lower Than the Underlying Groundwater, as Anticipated; However, …
The Bridge Newsletter Winter 2011,
2011
Missouri University of Science and Technology
The Bridge Newsletter Winter 2011, Missouri University Of Science And Technology
The Bridge Newsletter
-Living intentionally: Meet the Oerthers
-Making a lasting impact
-Phytoforensics
-The simple things of life
Modern Protection Systems To Prevent Corrosion Of Structural Steel Elements Due To Deicing And Roadway Salts,
2011
Missouri University of Science and Technology
Modern Protection Systems To Prevent Corrosion Of Structural Steel Elements Due To Deicing And Roadway Salts, John J. Myers, Wei Zheng
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The effectiveness of innovative polymeric coatings, polyurea and Poly aspartic polyurea, to protect structural steel from corrosion was investigated through standard laboratory tests. the coating evaluation tests included salt fog test, QUV weathering test, adhesion test, and freeze-thaw stability test. These tests were used to assess the long-term performance of coating technologies compared to the conventional polyurethane type coatings, i.e. coating systems with inorganic zinc primer, epoxy intermediate coat and polyurethane topcoat. This paper presents part of results in the aforementioned evaluation tests. the results illustrate that Poly aspartic coating systems are very promising for corrosion mitigation and can provide …
Correction Factors For An Analytical Method Of Pile Foundation Response Subjected To Horizontal Dynamic Vibrations,
2011
Missouri University of Science and Technology
Correction Factors For An Analytical Method Of Pile Foundation Response Subjected To Horizontal Dynamic Vibrations, Domenica Cambio, Louis Ge
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In pile foundation response due to horizontal vibration, it is known that the original Novak's method overestimates the dominant frequency and underestimates the dominant amplitude of pile head responses. It is found that reducing the pile-foundation system stiffness and damping coefficients would lead to a smaller dominant frequency and higher dominant amplitude, respectively. the objective of this paper is to evaluate and determine appropriate correction factors for stiffness and damping coefficients for the analytical model developed by Novak and El-Sharnouby (1983) to improve the theoretical predictions of pile foundations subjected to dynamic forces. the reduction factors were determined by continuously …
Accelerated Construction For Pedestrian Bridges: A Comparison Between High Strength Concrete (Hsc) And High-Strength Self Consolidating Concrete (Hs-Scc),
2011
Missouri University of Science and Technology
Accelerated Construction For Pedestrian Bridges: A Comparison Between High Strength Concrete (Hsc) And High-Strength Self Consolidating Concrete (Hs-Scc), John J. Myers, Kurt Bloch
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
High-strength concrete (HSC) and glass fiber reinforced polymer (GFRP) bars are materials utilized in bridge construction to lower cost, reduce construction time, and increase service life of bridge structures. Recently, high-strength self-consolidating concrete (HS-SCC), a highly flowable concrete that does not require vibration, has been developed as a viable alternative to HSC for use in situations with congested steel or a need for rapid construction. Coupling HS-SCC with GFRP bars could create durable structures built rapidly. Several performance related issues remain to be investigated such as the behavior of prestress loss, shear, creep, shrinkage, thermal gradients, mechanical property development, time …
Earthquake-Induced Deformation Analysis Of A Bridge Approach Embankment In Missouri,
2011
Missouri University of Science and Technology
Earthquake-Induced Deformation Analysis Of A Bridge Approach Embankment In Missouri, W. Liu, Ronaldo Luna, Richard Wesley Stephenson, S. Wang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Earthquake-Induced Deformations for a Bridge Approach Earth Embankment Are Predicted using a Calibrated Numerical Model. the Constitutive Soil Model is a Modified Hyperbolic Model that Uses Masing Rules and Incremental Pore Pressure Relations. the Model Was Calibrated using Both Laboratory and Field Data. a Shaking Table Physical Model Was Used to Verify the Numerical Simulation. Additionally, the Upper San Fernando Dam Was Modeled to Reproduce the Deformations in the 1971 Earthquake. the Subsurface and Embankment Soil Conditions Were Characterized using Field and Laboratory Methods. the Model Developed Was Used to Predict the Earthquake-Induced Deformations of an Approach Embankment to Bridge …
Influence Of Geotechnical Dataset On The Range Of Influence Of Undrained Shear Strength,
2011
Missouri University of Science and Technology
Influence Of Geotechnical Dataset On The Range Of Influence Of Undrained Shear Strength, Site Onyejekwe, Louis Ge
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The knowledge of the spatial variability of geotechnical parameters, which can be described statistically by the mean, the variance, and the scale of fluctuation, is important in reliability-Based design. of particular importance is the scale of fluctuation. It can be used to compute the variance reduction factor, a factor of spatial averaging of geotechnical properties to reduce their point variance. the most prevalent method of determining the scale of fluctuation uses datasets whose data points are at close and regular intervals, e.g. measurements from cone penetrometer soundings. Another method, when continuous measurements are not available, uses datasets that are widely …
Special Issue On The 6th International Phytotechnologies Conference, St. Louis, Missouri, 2009: Conference Review,
2011
Missouri University of Science and Technology
Special Issue On The 6th International Phytotechnologies Conference, St. Louis, Missouri, 2009: Conference Review, Joel G. (Gerard) Burken, Jason C. White
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
No abstract provided.
Arsenic Accumulation In Rice Grains: Effects Of Cultivars And Water Management Practices,
2011
Missouri University of Science and Technology
Arsenic Accumulation In Rice Grains: Effects Of Cultivars And Water Management Practices, Bin Hua, Wengui Yan, Jianmin Wang, Baolin Deng, John Yang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Arsenic (As) accumulation in rice grains is a threat to human health and marketability of rice products. in an effort to minimize as uptake by rice grains, field experiments were conducted to investigate as accumulation in rice grains of three cultivars in monosodium methane arsonate-treated soil under saturated and flooded water management practices. Results indicated that as concentrations in rice grains were cultivar-dependent and influenced by water management. Soil flooding would substantially enhance the as accumulation with a great variation among cultivars. Extractable as in the soil was positively correlated with sodium dithionite-sodium citrate-sodium bicarbonate solution-extractable Fe, suggesting a strong …
Numerical Modeling Of Aquaculture Dissolved Waste Transport In A Coastal Embayment,
2011
Missouri University of Science and Technology
Numerical Modeling Of Aquaculture Dissolved Waste Transport In A Coastal Embayment, Subhas K. Venayagamoorthy, Hyeyun Ku, Oliver B. Fringer, Alice Chiu, Rosamond L. Naylor, Jeffrey R. Koseff
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Marine aquaculture is expanding rapidly without reliable quantification of effluents. The present study focuses on understanding the transport of dissolved wastes from aquaculture pens in near-coastal environments using the hydrodynamics code SUNTANS (Stanford Unstructured Nonhydrostatic Terrain-following Adaptive Navier-Stokes Simulator), which employs unstructured grids to compute flows in the coastal ocean at very high resolution. Simulations of a pollutant concentration field (in time and space) as a function of the local environment (bathymetry), flow conditions (tides and wind-induced currents), and the location of the pens were performed to study their effects on the evolution of the waste plume. The presence of …
Phytoforensics, Dendrochemistry, And Phytoscreening: New Green Tools For Delineating Contaminants From Past And Present,
2011
Missouri University of Science and Technology
Phytoforensics, Dendrochemistry, And Phytoscreening: New Green Tools For Delineating Contaminants From Past And Present, Joel Gerard Burken, Don A. Vroblesky, Jean Christophe Balouet
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
As Plants Evolved to Be Extremely Proficient in Mass Transfer with their Surroundings and Survive as Earth's Dominant Biomass, They Also Accumulate and Store Some Contaminants from Surroundings, Acting as Passive Samplers. Novel Applications and Analytical Methods Have Been Utilized to Gain Information About a Wide Range of Contaminants in the Biosphere Soil, Water, and Air, with Information Available on Both Past (Dendrochemistry) and Present (Phytoscreening). Collectively These Sampling Approaches Provide Rapid, Cheap, Ecologically Friendly, and overall "Green" Tools Termed "Phytoforensics". © 2011 American Chemical Society.
Implementation Of Integrated Commissioning, Retrofits, And Control Optimization Process In A Small Commercial Building,
2011
University of Nebraska-Lincoln
Implementation Of Integrated Commissioning, Retrofits, And Control Optimization Process In A Small Commercial Building, Xiangnan Shi
Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research
A large amount of the primary energy consumed in the US is derived from the built environment followed by energy consumed in the transportation and industrial sectors. Consequently, improving the energy efficiency of buildings is an important part of ensuring a more sustainable world for future generations. Of the various techniques employed to improve the energy efficiency of buildings, commissioning and retrofits continue to be the most widely applied solutions. Control optimization, mainly imbedded with continuous commissioning so far, is not applied as widely. Even though there are currently a few applications that integrate all three techniques, no comparison has …
Optimized Control Strategies For A Typical Water Loop Heat Pump System,
2011
University of Nebraska-Lincoln
Optimized Control Strategies For A Typical Water Loop Heat Pump System, Xu Lian
Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research
Water Loop Heat Pump (WLHP) System has been widely utilized in the Heating, Ventilating and Air Conditioning (HVAC) industry for several decades. There is no doubt about the energy saving potential of this type of system from the design and construction perspective. However, there are still many unsolved problems, such as high loop pump energy consumption, low heat pump efficiency and high electricity cost due to improper operation, although the system design intension was to save energy. Thus, how to control the WSHP to realize its energy-efficient value is an innovative but practical topic on which this thesis will focus. …
Implementation And Testing Of Rans Turbulence Models For Stably Stratified Flows,
2011
Missouri University of Science and Technology
Implementation And Testing Of Rans Turbulence Models For Stably Stratified Flows, Zachary A. Elliott, S. K. Venayagamoorthy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The presence of buoyancy forces due to stratification has a substantial effect on the flow development and mixing processes and hence influences the distribution of pollutants and suspended matter in environmental flows such as in reservoirs, lakes, and estuaries. In this study, we focus on the implementation and testing of proposed changes that explicitly account for buoyancy effects in Reynolds-averaged Navier-Stokes (RANS) turbulence models. Direct numerical simulation (DNS) data of stably stratified homogeneous turbulence are used to study the parameters in two-equation RANS turbulence models such as the buoyancy parameter Cε3, and the turbulent Prandtl number Prt in the k-ε …
