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Articles 11131 - 11160 of 13030
Full-Text Articles in Engineering
Local And Distortional Buckling Of Thin-Walled Beams, Reynaud Serrette, Teoman Pekoz
Local And Distortional Buckling Of Thin-Walled Beams, Reynaud Serrette, Teoman Pekoz
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Recent research has characterized the behavior of panel beams with laterally unsupported compression flanges as either a complex local buckling mode or an overall buckling mode. Tests have shown that the behavior of the unsupported flange and web is similar to that of lateral buckling, except, rotation is enforced along the axis of the web and the tension flange--a behavior which may be described as distortional buckling. In the work described here, an analytical expression is presented for computing the elastic distortional buckling stress based on a model which treats the web and compression flange as an elastically restrained beam. …
Tests On Full-Scale Roofing Systems, D. B. Moore
Tests On Full-Scale Roofing Systems, D. B. Moore
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This report details an experimental investigation on three full-scale, cold-formed steel roofing systems. The test programme included both uniformly and variably distributed loadings representative of drifting snow. Comparisons between the performance of each roof subject to these distributions are made and recommendations for the design of roofs loaded with variably distributed loads are presented. Finally observations on the tests to failure are discussed.
Contrasting Behaviour Of Thin Steel Roof Claddings Uder Simulated Cyclonic Wind Loading, Mahen Mahendran
Contrasting Behaviour Of Thin Steel Roof Claddings Uder Simulated Cyclonic Wind Loading, Mahen Mahendran
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
During an investigation on thin steel roof claddings under simulated cyclonic wind loading, it was found that trapezoidal roofing behaved quite differently to corrugated roofing due to the presence of overload cycles. This paper examines this contrasting behaviour of these two roofing profiles.
On Design Of Profiled Sheets With Varying Cross Sections, Laszlo Horvath, Miklos Nemeti, Bela Veroci
On Design Of Profiled Sheets With Varying Cross Sections, Laszlo Horvath, Miklos Nemeti, Bela Veroci
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
A short review is given on the effective width concept and about its use for determining of the moment capacity of sheets. A modified method, taking into account the varying flexural rigidity along the spans, is described and illustrated on examples carried out on first -generation panels.
Properties For Cellular Decks In Negative Bending, K. Balaji, Larry D. Luttrell
Properties For Cellular Decks In Negative Bending, K. Balaji, Larry D. Luttrell
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cellular roof and floor decks may be formed by attaching essentially flat sheets to a "hat-shapes" or to fluted profiles by spot welding along the contact lines. This leads to a closed cellular deck unit suitable for such purposes as in-floor power distribution or communication systems. In positive bending, or when the flat sheet is in tension and stable, cellular deck flexural properties can be determined following the American Iron and Steel Institute Cold Formed Steel Design Manual. When the flat sheet is in compression, its contribution is not described in the AISI Manual since it is not continuously connected …
Composite Slabs Analyzed By Block Bending Test, Li An, Krister Cederwall
Composite Slabs Analyzed By Block Bending Test, Li An, Krister Cederwall
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
A new small-scale test, concrete block bending test, was carried out to determine the amount of shear stress and the slip distribution at the interface between the steel sheet and the concrete. The result was then used in the finite element analysis to predict the behaviour of composite slabs. Good agreement has been shown between the analytical results and measured results from the full-scale composite slabs.
Repeated Point Loading Tests On Composite Slabs, Yoshimitsu Itoh, Kiyoshi Komori, Hiroshi Fujioka
Repeated Point Loading Tests On Composite Slabs, Yoshimitsu Itoh, Kiyoshi Komori, Hiroshi Fujioka
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Single span and double span composite slab specimens were tested by subjecting them to concentrated repeated point loading. From the test results, it was found that the control of concrete cracks caused by the negative moment over the interior support is important in the latter case.
Thermal Shielding Near Intermediate Supports Of Continuous Span Composite Slabs, Kees Both, Leen Twilt, Jan W. B. Stark
Thermal Shielding Near Intermediate Supports Of Continuous Span Composite Slabs, Kees Both, Leen Twilt, Jan W. B. Stark
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
At TNO Building and Construction Research, in close co-operation with the Eindhoven University of Technology, research is carried out on the behaviour of fire-exposed composite steel/concrete slabs, in the framework of a research project co-sponsored by the ECSC (European Community for Steel and Coal). The paper describes the state of the art of the research project.
Design Of Channels Against Distortional Buckling, Y. B. Kwon, Gregory J. Hancock
Design Of Channels Against Distortional Buckling, Y. B. Kwon, Gregory J. Hancock
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Thin-walled lip-stiffened channel columns composed of high strength steel may fail in a distortional mode involving movement of the lip stiffener perpendicular to the flange plate it supports. In this report, test results for a simple lipped channel section(CH1) and an intermediate stiffened channel section (CH2) of thickness of approximately 1.1 mm (0.043 in) and 550 MPa (79.8 ksi) steel and undergoing distortional or mixed local-distortional buckling failure are compared with different design methods. The design methods compared are Australian Standard AS1538, EC3 Partl/ Annexe A, the ECCS Recommendations and the AISI Specification. In addition, new methods based on a …
Distortional Buckling Of Cold-Formed Steel Z-Section Columns, P. Charnvarnichborikarn, Dimos Polyzois
Distortional Buckling Of Cold-Formed Steel Z-Section Columns, P. Charnvarnichborikarn, Dimos Polyzois
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Current North American guidelines for the design of cold-formed steel members consider the web of cold-formed steel sections under direct compression to be a fully stiffened element. This, however, may not be true if the flanges cannot provide sufficient restraint to the web. In this case, instability of the web element may cause distortional failure of the flange-edge stiffener component which may limit the load-carrying capacity of these sections with very little post-buckling strength being realized. In the present paper, the effect of web buckling on the load-carrying capacity of Z-sections with partially stiffened flanges is examined. The current design …
Flexibly Connected Thin-Walled Space Frame Stability, Sundar Chandramouli, Shien T. Wang, George E. Blandford
Flexibly Connected Thin-Walled Space Frame Stability, Sundar Chandramouli, Shien T. Wang, George E. Blandford
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The elastic stability of a cubic space frame composed of cold-formed steel members is studied for various bending and warping rigidities. A finite element technique is used to perform a parametric study of the elastic stability response of the flexibly connected frame. The results are compared with previously published observations for hot-rolled steel sections. The criterion used for deciding the significance of warping for hot-rolled sections is not found to be applicable to cold-formed sections.
Shah Alam Sports Complex Design And Construction Of Unistrut Space-Frame Roof Structure, Khaldoun Mhaimeed, Sun Chien Hsiao
Shah Alam Sports Complex Design And Construction Of Unistrut Space-Frame Roof Structure, Khaldoun Mhaimeed, Sun Chien Hsiao
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The Shah Alam Sports Complex is a $100-million multiuse sports facility in Selangor, Malysia. The main feature of this complex is a 72000-seat multisport stadium. Seating on both sides of the stadium will be covered by a pair of barrel-vaulted acrylic sky roofs. Each roof is structurally supported by a Unistrut Space-Frame which in tum is supported at three of its four edges with a free span of 931 feet (284 m). The frame is cantilevered from the back 226 feet (69 m) over the seats. In this paper, design philosophy to satisfy serviceability and ultimate limit states is discussed. …
Some Applications Of Generalized Beam Theory, J. Michael Davies, Philip Leach
Some Applications Of Generalized Beam Theory, J. Michael Davies, Philip Leach
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Generalised Beam Theory (GBT) has been developed by Professor R Schardt and his colleagues at the University of Darmstadt in Germany. The definitive reference at the present time is a recent German text(1) which describes the first-order theory. For the analysis of cold-formed sections, second-order theory may be required and this is less well documented. This paper will attempt to describe the principles involved and illustrate them by means of some practical examples. GBT unifies the conventional theories for the analysis of prismatic thin-walled structural members within a consistent notation. It then extends them into new territory. Conventional beam theory …
Recent Developments In Cold Formed Steel, Robert W. Dannemann
Recent Developments In Cold Formed Steel, Robert W. Dannemann
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
During the last fifteen years the author has been working in the development of new products in cold formed steel, mainly in building applications. Cold formed steel makes possible practically an infinite variety of shapes, one for each need and function. This possibility is a continuous challenge for designers in finding, among many alternatives, the optimal solution for each problem. The author describes briefly a set of six proposals, which are either an already tested and proven product, or just its phase of design. As in any human doing, the author is conscious that these proposals may be accomplished and …
The 1989 Edition Of The Canadian Cold Formed Steel Design Standard, R. M. Schuster
The 1989 Edition Of The Canadian Cold Formed Steel Design Standard, R. M. Schuster
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper presents excerpts from the latest edition of the Canadian Standard for the design of cold formed steel structural members (CAN/CSA-SI36-M89). Considerable technical changes, reflecting the latest research developments, have been incorporated into this edition of the Standard. These changes are based on an increased understanding of the behaviour of cold formed steel structures, members, and elements and of cold formed steel as a structural material. Some of the more significant technical changes of the Standard are discussed in greater detail. Comparisons with the Standard's predecessor (CAN3-S136-M84), and whenever appropriate, with the 1986 AISI Specifications are also made.
Appendix: List Of Participants [1992], Kentucky Transportation Center
Appendix: List Of Participants [1992], Kentucky Transportation Center
Kentucky's Annual Forum on Transportation
No abstract provided.
Transportation Of The Future And The Future Of Transportation, Lee T. Todd Jr.
Transportation Of The Future And The Future Of Transportation, Lee T. Todd Jr.
Kentucky's Annual Forum on Transportation
No abstract provided.
Transportation Of The Future And The Future Of Transportation, John A. Deacon
Transportation Of The Future And The Future Of Transportation, John A. Deacon
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodalism: What It Is And How It Works. Transamerica Transportation Corridor Transportation Options For The Twenty-First Century, James L. Covil
Intermodalism: What It Is And How It Works. Transamerica Transportation Corridor Transportation Options For The Twenty-First Century, James L. Covil
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodalism: What It Is And How It Works. Intermodal Transportation: Past, Present, And Future, Benjamin J. Allen
Intermodalism: What It Is And How It Works. Intermodal Transportation: Past, Present, And Future, Benjamin J. Allen
Kentucky's Annual Forum on Transportation
No abstract provided.
Transportation: We Shape It And It Shapes Us, J. M. Yowell
Transportation: We Shape It And It Shapes Us, J. M. Yowell
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, James Q. Duane
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, James Q. Duane
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Roland J. Mross
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Roland J. Mross
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Douglas B. Ham
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Douglas B. Ham
Kentucky's Annual Forum on Transportation
No abstract provided.
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Eugene R. Mccormick
Intermodal Surface Transportation Efficiency Act (Istea): A New Way Of Doing Business, Eugene R. Mccormick
Kentucky's Annual Forum on Transportation
No abstract provided.
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: Kentucky Overview, Calvin G. Grayson
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: Kentucky Overview, Calvin G. Grayson
Kentucky's Annual Forum on Transportation
No abstract provided.
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: Industry Overview, James M. Wiseman
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: Industry Overview, James M. Wiseman
Kentucky's Annual Forum on Transportation
No abstract provided.
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: National Overview, Lester P. Lamm
Understanding Transportation In The Commonwealth: How Decisions Of The Past Affect Us Today: National Overview, Lester P. Lamm
Kentucky's Annual Forum on Transportation
No abstract provided.
History Of Transportation In The Commonwealth, Ned Breathitt
History Of Transportation In The Commonwealth, Ned Breathitt
Kentucky's Annual Forum on Transportation
No abstract provided.
Kentucky Transportation Hall Of Fame [1992], Kentucky Transportation Center
Kentucky Transportation Hall Of Fame [1992], Kentucky Transportation Center
Kentucky's Annual Forum on Transportation
No abstract provided.