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Interim Design Rules For Flexure In Cold-Formed Steel Webs, Benjamin W. Schafer, T. W. J. Trestain

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

The design of cold-formed steel webs in flexure is governed by section B2.3 of the AISI Specification. Harmonization of the AISI (1996) Specification with the Canadian Standard (S136 1994), for the development of the new North American Specification (NAS 2001) has brought to light shortcomings in both the U.S. and Canadian documents and lead to the adoption of an interim design approach in the NAS (2001). The interim approach employs the AISI (1996) rules for one class of members and the S136 (1994) rules for a second class. Assessment of the resulting method with existing bending tests on Cees and …

Ultimate Failure Behaviour Of Second-Generation Sheeting Subjected To Combined Bending Moment And Concentrated Load, M. Kaspers, H. H. Snijder, Monique Bakker, H. Hofmeyer

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

Second-generation sheeting is widely used for cladding and roof construction. At interior supports, it is subjected to combined bending moment and concentrated load. Unfortunately, design rules for this loading are complicated and do not provide insight in the sheeting's failure behaviour. This means there is a need for a new, insight providing design rule. For first-generation sheeting, a similar problem did exist. The Technische Universiteit Eindhoven (TUE) carried out three research projects [Bakk92a,Vaes95a,Hofm00a] that provided insight in the first-generation sheeting behaviour and resulted in a new, insight providing design rule. The TUE now uses the strategy of these three research …

Plastic Strength Of Thin-Walled Members, Dan Dubina, Viorel Ungureanu

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

Failure of thin-walled cold-formed members in compression is always characterized by a local plastic mechanisms, either a stub or slender column is referred. Starting from this observation, the authors suggest for the interactive local-overall buckling analysis to use instead of traditional "effective section", the sectional plastic mechanism strength. This is a new approach and for this reason it is compared with another one, namely the Direct Strength Method. Experimental results and advanced FEM simulations are used to evaluate the two methods. Comparisons with European and American relevant design codes are also presented in the paper.

The Design Of The Pallet Program, R. G. Beale, M. H. R. Godley

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

This paper describes the procedures underlying the development of the Pallet program which has been produced to design regular pallet racks according to the FEM code. The program determines the buckling load of the equivalent free sway structure and, using stability functions, calculates the axial and shear forces and the bending moments within the structure including the non-linear P - Δ effects. Twelve different combinations of load are analysed and design checks given in the FEM code applied. The paper discusses the different modes of operation of the program. Finally the accuracy of the program is discussed together with future …

Analysis Of Sheathed Cold-Formed Steel Wall Studs, Benjamin W. Schafer, Badri Hiriyur

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

The strength of sheathed wall systems is substantially greater than unsheathed walls with the same studs. Testing on studs sheathed on both sides with dry gypsum board demonstrate strength increases as large as 70% over unsheathed studs (Miller and Pekoz 1993, Miller and Pekoz 1994). The current AISI Specification for sheathed wall stud systems are complicated, only apply when the sheathing is identical on both sides, have several onerous prescriptive requirements, and the mechanical model employed has been questioned when compared to experimental results. This paper summarizes the deficiencies of, and arguments against, current models and suggests avenues of research …

Experimental Analysis Of Cold-Formed Steel Channel And Lipped-Channel Profiles Connected To Roof Panel - R-Factor Analysis, Maximiliano Malite, Carlos Eduardo Javaroni, Roberto Martins Goncalves

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

This paper presents and discusses test results of simulated suction effect due wind action on purlin-channel and lipped-channel sections carried out in a "vacuum box". The chosen profile sections and their dimensions are those frequently used in steel construction in Brazil. The experimental results and the failure mode analysis of the purlin behaviour subjected to suction effect were compared with the theoretical analysis and R-factor for all load steps. The tests were carried out in a " vacuum box" with plan dimensions of 4 m x 6 m, where the suction effect due to wind was simulated. The air contained …

Vibration Characteristics Of Lightweight Floors Using Cold-Formed Steel Joist, L. Xu, F. M. Tangorra, W. C. Xie

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

Presented in this paper are the results of a recent study carried out at the University of Waterloo on vibration characteristics of cold-formed steel-supported residential floor systems and different design criteria available for the evaluation of lightweight floor systems. Laboratory tests were conducted for the floors with different spans and assemblies. Both static and dynamic tests were carried out on the floor systems. The static tests were used to evaluate the stiffness and the load sharing among the joists, while the dynamic tests were used to evaluate the relevant dynamic characteristics, such as natural frequencies and damping ratios, of the …

Higher Education: Practically Useful Or Existentially Meaningful?, Philosophical Discussion Group, Armstrong State University

The Philosopher's Stone

No abstract provided.

Unmeasured Factors Of Success, John K. Carmack

Vol. 1: Answering God's Interrogatories

This fireside address was given at the BYU Law School on March 10, 1996.

Lawyers And The Atonement, Thomas B. Griffith

Vol. 1: Answering God's Interrogatories

This BYU–Hawaii Presidential Lecture was given in Laie, Hawaii on March 23, 2000.

Use Of Physics Based Models In Hyperspectral Image Exploitation, John Schott, Kyungsuk Lee, Rolando Raqueno

Articles

This paper describes a concept for using physics based models to support exploitation of remotely sensed image spectrometer data. It then reviews several methods from the literature illustrating more specifically how physics based models have been used as part of atmospheric correction, water quality assessment and temperature measurement algorithms. Finally a new approach for using model based techniques for subpixel target detection is presented This technique builds on a previously introduced invariant method that uses physics based models to support target detection of fully resolved targets without requiring in scene training or atmospheric correction. An example using the new subpixel …

Pure Religion, Stephen A. West

Vol. 1: Answering God's Interrogatories

This address was given on May 24, 1994 to graduates of the BYU Law School who had come to Washington, D.C. to be admitted to practice before the U.S. Supreme Court on the following day.

Apostles Of Equality, Kenneth R. Wallentine

Vol. 1: Answering God's Interrogatories

This article reprinted from the Clark Memorandum, Fall 1992, 2-4, 6-9.

Confirm Thy Soul In Self-Control, D. Todd Christofferson

Vol. 1: Answering God's Interrogatories

This address was given to the Orange County and Los Angeles County Chapters of the J. Reuben Clark Law Society on September 29 and 30, 2000.

Truth: A Shield To Memory, Marion D. Hanks

Vol. 1: Answering God's Interrogatories

This fireside address was given at the BYU Law School on November 19, 1989.

Lawyer As Policy Maker, Rex E. Lee

Vol. 1: Answering God's Interrogatories

This convocation address was given to the charter class of the BYU Law School on April 23, 1976.

Index

Vol. 1: Answering God's Interrogatories

No abstract provided.

Mustang Daily, October 16, 2002

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

Deafdigest: Deaf Sports News October 16, 2002, Barry Strassler

DeafDigest Sports 2002

No abstract provided.

Military Court To Try Two Generals For Human Rights Abuses In 1970s, 1980s, Ladb Staff

SourceMex

No abstract provided.

The Winonan, Winona State University

The Winonan - 2000s

No abstract provided.

Montana Kaimin, October 16, 2002, Associated Students Of The University Of Montana

Montana Kaimin, 1898-present

Student newspaper of the University of Montana, Missoula.

The Lumberjack, October 16, 2002

Cal Poly Humboldt's Student Newspaper

The student newspaper of Humboldt State University.

The Spinnaker Vol. 26, No. 9, University Of North Florida

Spinnaker

Student newspaper for the UNF community.

False Labeling And Its Ramifications For Organic Food Product Markets, Konstantinos Giannakas

Cornhusker Economics

Consumer concerns regarding the health and environmental effects of inputs used in conventional production systems (i.e., fertilizer, pesticides, etc.), coupled with rising living standards and/or subsidization of organic agriculture (i.e., case of the European Union (EU)), have resulted in the development of fast growing markets for organic food in several countries around the world. “Organic” refers to food produced through a process characterized by mandatory “soil building” crop rotations and absence of synthetic inputs. The lack of synthetic inputs results in reduced yields and, when compared to conventional food production, the production of organic food is more labor intensive

Long-Lived Oscillons From Asymmetric Bubbles: Existence And Stability, Artur B. Adib, Marcelo Gleiser, Carlos A.S Almeida

Dartmouth Scholarship

The possibility that extremely long-lived, time-dependent, and localized field configurations (“oscillons”) arise during the collapse of asymmetrical bubbles in (2+1)-dimensional φ4 models is investigated. It is found that oscillons can develop from a large spectrum of elliptically deformed bubbles. Moreover, we provide numerical evidence that such oscillons are (a) circularly symmetric and (b) linearly stable against small arbitrary radial and angular perturbations. The latter is based on a dynamical approach designed to investigate the stability of nonintegrable time-dependent configurations that is capable of probing slowly growing instabilities not seen through the usual “spectral” method.

Multiresolution, Dynamic, And Adaptive Image Quantization Methodology: Automation And Analysis, Leen-Kiat Soh

School of Computing: Faculty Publications

We describe a multiresolution, dynamic, and adaptive image quantization methodology with automation being the goal of our research. To improve the robustness of the approach, we incorporate dynamic local thresholding and multiresolution peak detection. The first strategy extracts bisector values from local regions of the image and builds a histogram based on those values. The second strategy maps the derived histogram into multiple levels of resolution, allowing peaks be scored for their significance and localized. We conduct several experiments to analyze different versions of our quantization methodology and to compare it with the equal probability quantization. We also investigated the …

October 16, 2002, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

The George-Anne, Georgia Southern University

The George-Anne

• Police Beat
• Opinions
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• Classifieds

Deafdigest: Deaf Sports News October 15, 2002, Barry Strassler

DeafDigest Sports 2002

No abstract provided.