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- Bridges (2)
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- Improved truncated singular value decomposition (2)
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- AASHTO T 322 (1)
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- Publication
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- Civil, Architectural and Environmental Engineering Faculty Research & Creative Works (14)
- American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present) (9)
- CCFSS Library (1939 - present) (3)
- CCFSS Newsletters (1999 - 2008) (2)
- CCFSS Technical Bulletins (1993 - 2020) (2)
Articles 1 - 30 of 33
Full-Text Articles in Engineering
Liquefaction Behavior Of Mississippi River Silts, Ali M. Izadi, Ronaldo Luna, Richard Wesley Stephenson
Liquefaction Behavior Of Mississippi River Silts, Ali M. Izadi, Ronaldo Luna, Richard Wesley Stephenson
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Civil Infrastructure Built on Alluviums and Recent Deposits, Such as Dams, Contain Significant Amount of Silts. the Static and Dynamic Behavior of These Fine-Grained Soils Has Been Investigated Less Than the Clay-Like or Sand-Like Soils. Low Plasticity Silts (PI = 6) Obtained East of St. Louis in Illinois Are Known as Loess that Has Been Re-Deposited by Water in the Floodplains of the Mississippi River. These Silts Were Reconstituted in the Laboratory by Slurry at Water Content above the Liquid Limit and Then Consolidated to an Initial Effective Stress. the Initial Laboratory Characterization under Monotonic Loading Included a Series of …
Multiple Radar Data Merging In Hydro-Nexrad, Witold F. Krajewski, Bong Chul Seo, Anton Kruger, Piotr Domaszczynski, Gabriele Villarini, James A. Smith
Multiple Radar Data Merging In Hydro-Nexrad, Witold F. Krajewski, Bong Chul Seo, Anton Kruger, Piotr Domaszczynski, Gabriele Villarini, James A. Smith
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Hydro-NEXRAD merging algorithms include two options: (1) data-based merging; and (2) product-based merging. Data-based merging algorithm takes volume scan reflectivity data from all radars involved through preprocessing algorithm that performs volume data quality control, interpolates data to synchronize temporal scale between individual radars, and finally combines data onto a common geographic grid. Reflectivity values for a given location are assigned by a weighting function with respect to the distance from the radar. This single reflectivity field is then converted to rainfall amounts using a user-requested standard approach. In product-based merging algorithm reflectivity data from multiple radars are all converted …
Hydro-Nexrad: An Updated Overview And Metadata Analysis, Witold F. Krajewski, Anton Kruger, Piotr Domaszczynski, Charles Gunyon, Bong Chul Seo, Radosław Goska, James A. Smith, Mary Lynn Beack, Matthias Steiner
Hydro-Nexrad: An Updated Overview And Metadata Analysis, Witold F. Krajewski, Anton Kruger, Piotr Domaszczynski, Charles Gunyon, Bong Chul Seo, Radosław Goska, James A. Smith, Mary Lynn Beack, Matthias Steiner
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Hydro-NEXRAD is a prototype system that allows hydrologists to obtain user-specified rainfall data for their research. These data are based on observations collected by the national network of WSR-88D radars, known as NEXRAD. Users interact with Hydro-NEXRAD through a web-based interface that has map-based components for spatial navigation, calendar- and time series plot components for temporal navigation and a menu-based component for selection of processing options. Through the interface, users browse the Hydro-NEXRAD metadata and select data of interest. As the system is approaching the point of being fully operational, the authors and a group of test users have evaluated …
Inelastic Performance Of Screw Connected Cfs Strap Braced Walls, Kostadin Velchev, Colin A. Rogers
Inelastic Performance Of Screw Connected Cfs Strap Braced Walls, Kostadin Velchev, Colin A. Rogers
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
An Atc-63 Study In Support Of The Proposed System Performance Factors For Aisi S110 Standard For Seismic Design Of Cold-Formed Steel Structures: Special Bolted Moment Frames, American Iron And Steel Institute
An Atc-63 Study In Support Of The Proposed System Performance Factors For Aisi S110 Standard For Seismic Design Of Cold-Formed Steel Structures: Special Bolted Moment Frames, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Inelastic Performance Of Welded Cfs Strap Braced Walls, Giles Comeau
Inelastic Performance Of Welded Cfs Strap Braced Walls, Giles Comeau
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Strain Sensitive Coax Cable Sensors For Monitoring Structures, Genda Chen, James L. Drewniak, Huimin Mu, David Pommerenke
Strain Sensitive Coax Cable Sensors For Monitoring Structures, Genda Chen, James L. Drewniak, Huimin Mu, David Pommerenke
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The invention provides increased structural monitoring systems that have sensitive continuous coaxial cable sensors. A preferred embodiment sensor cable of the invention includes an inner conductor, a dielectric jacket, and an outer conductor that is configured to passively deform responsively to strain in an associated structure. The deformation can be aided by the physical structure of the dielectric jacket, the outer conductor, or a combination of both. The deformation translates strain into a measurable change in a reflection coefficient associated with the outer conductor.
Section Properties For Cellular Decks Subjected To Negative Bending, Gregory L. Snow, W. Samuel Easterling
Section Properties For Cellular Decks Subjected To Negative Bending, Gregory L. Snow, W. Samuel Easterling
CCFSS Library (1939 - present)
Cellular decks are formed by attaching cold-formed “hat-shaped” deck sections on top of cold-formed steel sheets. The attachment is typically made using resistance spot welds spaced at a specific interval. The void left underneath the deck flutes and above the steel sheet provides a convenient means for the distribution of wiring and data cables throughout building systems. The section properties of cellular decks subjected to positive bending can be determined using the provisions of Chapter B of the 2001 AISI Specification (AISI, 2001). However, the provisions of Chapter B do not apply to cellular decks subjected to negative bending unless …
Ccfss Technical Bulletin Fall 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss Technical Bulletin Fall 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Technical Bulletins (1993 - 2020)
No abstract provided.
Ccfss News Fall 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss News Fall 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Newsletters (1999 - 2008)
No abstract provided.
Deep Deck And Cellular Deck Diaphragm Strength And Stiffness Evaluation, American Iron And Steel Institute
Deep Deck And Cellular Deck Diaphragm Strength And Stiffness Evaluation, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Analytical Study On Rotational Restraint Of Sheathing, Y. Guan
Analytical Study On Rotational Restraint Of Sheathing, Y. Guan
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Fresh Self Compacting Concrete, A Shear Thickening Material, Dimitri Feys, Ronny Verhoeven, Geert De Schutter
Fresh Self Compacting Concrete, A Shear Thickening Material, Dimitri Feys, Ronny Verhoeven, Geert De Schutter
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In Literature, the Rheological Properties of Concrete Have Been Investigated Thoroughly, resulting in a Simple Description, in Steady State, by Means of the Bingham Model. Self-Compacting Concrete Shows a Lower Yield Stress, Which in Some Cases is Very Close to Zero, or Can Even Appear to Be Negative When Extrapolating the Bingham Model. in the Latter Case, the Bingham Model is Not Valid and Other Solutions Must Be Found. in This Paper, the Non-Linearity - or Shear Thickening - in the Rheological Behavior of Fresh SCC is Described with the Modified Bingham Model, after the Elimination of Possible Measurement Artefacts. …
Reinforcement Schemes For Cfs Joists Having Web Openings, K. Siva Sivakumaran
Reinforcement Schemes For Cfs Joists Having Web Openings, K. Siva Sivakumaran
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
The Standard for Cold-Formed Steel Framing - Prescriptive Method for One and Two Family Dwellings, AISI S230-07, as well as other industry span and load tables are based on the standard web openings (i.e., punchouts), as defined in the North American Standard for Cold- Formed Steel Framing - Product Data, AISI S201-07. Presented in this report are the findings from an extensive testing program conducted at McMaster University on full-scale floor joists having larger web openings. Presented is an initial Final Report (86 pages) that was issued by the researcher in March 2007, as well as the results of Additional …
Strength Of Cold-Formed Steel Jamb Stud-To-Track Connections, A. Victor Lewis, Reinhold M. Schuster, Steven R. Fox
Strength Of Cold-Formed Steel Jamb Stud-To-Track Connections, A. Victor Lewis, Reinhold M. Schuster, Steven R. Fox
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
The North American Standard for Cold-Formed Steel Framing - Wall Stud Design, AISI S211-07, provides a design expression for web crippling at the end reaction of the single stud-to-track connection. The subject of this report is an experimental investigation that was carried out at the University of Waterloo to establish a similar design expression for multiple jamb stud members. It is anticipated that the AISI Committee on Framing Standards will consider the results of this study in the development of future standards and the Cold-Formed Steel Engineers Institute in the development of design aids. The American Iron and Steel Institute …
Strength Of Arc-Spot Welds Made In Single And Multiple Steel Sheets, Gregory L. Snow, W. Samuel Easterling
Strength Of Arc-Spot Welds Made In Single And Multiple Steel Sheets, Gregory L. Snow, W. Samuel Easterling
CCFSS Library (1939 - present)
The objective of this research was to establish a relationship between arc spot weld shear strength and the arc time used to form the weld. Lap shear tests were performed on both 3/4 in. and 5/8 in. nominal diameter welds. Each weld was formed in one-, two-, or four-layers of sheet steel ranging from 22 gauge (0.028 in.) to 16 gauge (.057 in.). Three distinct time series were tested for each unique weld size, thickness of sheet steel and layer configuration. The first of these series were the full-time welds. The two remaining series, 2/3-time and 1/3-time welds, had arc …
Reinforcement Schemes For Cfs Joists Having Web Openings, K. S. Sivakumaran
Reinforcement Schemes For Cfs Joists Having Web Openings, K. S. Sivakumaran
CCFSS Library (1939 - present)
No abstract provided.
Determination Of Creep Compliance And Tensile Strength Of Hot-Mix Asphalt For Wearing Courses In Missouri, David Newton Richardson, S. M. Lusher
Determination Of Creep Compliance And Tensile Strength Of Hot-Mix Asphalt For Wearing Courses In Missouri, David Newton Richardson, S. M. Lusher
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Creep compliance and indirect tensile (IDT) strength of hot-mix asphalt (HMA) are the two primary inputs to the low-temperature or thermal cracking module in the new Mechanistic-Empirical Pavement Design Guide (M-E PDG) software. Creep compliance is defined as time-dependent strain per unit stress, while IDT strength is best defined as HMA strength when subjected to tension. AASHTO T 322 test protocol was used as reference for this work. However in preparation for the laboratory work performed at the Missouri University of Science and Technology many experts were consulted as to how IDT creep/strength testing and calculations are actually being performed. …
A Fast Adaptive Wavelet Scheme In Rbf Collocation For Nearly Singular Potential Pdes, Nicolas Ali Libre, Arezoo Emdadi, Edward J. Kansa, Mohammad Shekarchi, Mohammad Rahimian
A Fast Adaptive Wavelet Scheme In Rbf Collocation For Nearly Singular Potential Pdes, Nicolas Ali Libre, Arezoo Emdadi, Edward J. Kansa, Mohammad Shekarchi, Mohammad Rahimian
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
We present a wavelet based adaptive scheme and investigate the efficiency of this scheme for solving nearly singular potential PDEs. Multiresolution wavelet analysis (MRWA) provides a firm mathematical foundation by projecting the solution of PDE onto a nested sequence of approximation spaces. The wavelet coefficients then were used as an estimation of the sensible regions for node adaptation. The proposed adaptation scheme requires negligible calculation time due to the existence of the fast DiscreteWavelet Transform (DWT). Certain aspects of the proposed adaptive scheme are discussed through numerical examples. It has been shown that the proposed adaptive scheme can detect the …
Ccfss Technical Bulletin Spring 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss Technical Bulletin Spring 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Technical Bulletins (1993 - 2020)
No abstract provided.
Ccfss News Spring 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss News Spring 2008, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Newsletters (1999 - 2008)
No abstract provided.
Specification For The Design, Testing, And Utilization Of Industrial Steel Storage Racks, Rack Manufacturers Institute
Specification For The Design, Testing, And Utilization Of Industrial Steel Storage Racks, Rack Manufacturers Institute
Rack Manufacturers Institute (RMI) Specifications and Manuals (1984 - 2012)
No abstract provided.
Commentary On The Specifications For The Design, Testing, And Utilization Of Industrial Steel Storage Racks, Rack Manufacturers Institute
Commentary On The Specifications For The Design, Testing, And Utilization Of Industrial Steel Storage Racks, Rack Manufacturers Institute
Rack Manufacturers Institute (RMI) Specifications and Manuals (1984 - 2012)
No abstract provided.
Bifidobacteria In Feces And Environmental Waters, Regina Lamendella, Jorge W. Santo Domingo, Catherine A. Kelty, Daniel B. Oerther
Bifidobacteria In Feces And Environmental Waters, Regina Lamendella, Jorge W. Santo Domingo, Catherine A. Kelty, Daniel B. Oerther
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Bifidobacteria have been recommended as potential indicators of human fecal pollution in surface waters even though very little is known about their presence in nonhuman fecal sources. The objective of this research was to shed light on the occurrence and molecular diversity of this fecal indicator group in different animals and environmental waters. Genus- and species-specific 16S rRNA gene PCR assays were used to study the presence of bifidobacteria among 269 fecal DNA extracts from 32 different animals. Twelve samples from three wastewater treatment plants and 34 water samples from two fecally impacted watersheds were also tested. The species-specific assays …
Estimation Of Sound Transmission Class And Impact Insulation Class Rating For Steel Framed Assemblies, American Iron And Steel Institute
Estimation Of Sound Transmission Class And Impact Insulation Class Rating For Steel Framed Assemblies, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Flexural Behavior And Strength Of Cold-Formed Steel L-Headers, Jesse Pauls, Lei Xu, S. R. Fox
Flexural Behavior And Strength Of Cold-Formed Steel L-Headers, Jesse Pauls, Lei Xu, S. R. Fox
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Stable Pde Solution Methods For Large Multiquadric Shape Parameters, Nicolas Ali Libre, Arezoo Emdadi, Edward J. Kansa, Mohammad Rahimian, Mohammad Shekarchi
Stable Pde Solution Methods For Large Multiquadric Shape Parameters, Nicolas Ali Libre, Arezoo Emdadi, Edward J. Kansa, Mohammad Rahimian, Mohammad Shekarchi
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
We present a new method based upon the paper of Volokh and Vilney (2000) that produces highly accurate and stable solutions to very ill-conditioned multiquadric (MQ) radial basis function (RBF) asymmetric collocation methods for partial differential equations (PDEs). We demonstrate that the modified Volokh-Vilney algorithm that we name the improved truncated singular value decomposition (IT-SVD) produces highly accurate and stable numerical solutions for large values of a constant MQ shape parameter, c, that exceeds the critical value of c based upon Gaussian elimination.
Estimation Of Earthquake Loss Due To Bridge Damage In The St. Louis Metropolitan Area: Part I - Direct Losses, Ronaldo Luna, David J. Hoffman, William T. Lawrence
Estimation Of Earthquake Loss Due To Bridge Damage In The St. Louis Metropolitan Area: Part I - Direct Losses, Ronaldo Luna, David J. Hoffman, William T. Lawrence
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The risk associated with earthquake hazards on highway systems is dependent on the complexity of a network and its redundancy in providing traffic flow. Earthquake loss estimation studies can provide decision makers with an appreciation of the importance of having a highway network resistant to earthquakes and information to make the network resistant to these events. The direct economic loss was estimated for a major metropolitan area, St. Louis, for a series of earthquake scenarios. The primary component of the study was damage to bridges within the highway system. The study zone covers the St. Louis metropolitan area and its …
Extension Of The Poiseuille Formula For Shear-Thickening Materials And Application To Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter
Extension Of The Poiseuille Formula For Shear-Thickening Materials And Application To Self-Compacting Concrete, Dimitri Feys, Ronny Verhoeven, Geert De Schutter
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In Practice, While Placing Concrete in a Formwork by Pumping, the Pressure Generated by the Pump is Not Controlled. in Order to Enhance the Safety on the Worksite, and in View of the Current Economic and Ecologic Arguments, It Would Be Useful to Dispose of an Equation Able to Predict Pressure Losses based on the Rheological Properties of the Concrete and the Pipe Configuration. This Paper Describes the Derivation of an Extended Version of the Poiseuille Formula, for Shear-Thickening Materials with a Yields Stress, Described by the Modified Bingham Equation. This Formula is Applied to Flow-Tests with Self-Compacting Concrete. the …
Estimation Of Earthquake Loss Due To Bridge Damage In The St. Louis Metropolitan Area. Ii: Indirect Losses, David Lee Enke, Chakkaphan Tirasirichai, Ronaldo Luna
Estimation Of Earthquake Loss Due To Bridge Damage In The St. Louis Metropolitan Area. Ii: Indirect Losses, David Lee Enke, Chakkaphan Tirasirichai, Ronaldo Luna
Engineering Management and Systems Engineering Faculty Research & Creative Works
An approach to estimate the indirect economic loss due to damaged bridges within the highway system from an earthquake event is presented. The indirect cost considered refers to the increased highway transportation cost only. The study zone covers the St. Louis metropolitan area and its surrounding suburban regions. An earthquake scenario centered in St. Louis, with a magnitude 7.0 is used. The direct earthquake loss was primarily damage to bridges, which causes an increase in travel time and distance within the transportation network. This information is then used as input for the indirect loss model. The indirect loss is examined …