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3,113 full-text articles. Page 7 of 88.

The 2017 Aisi Cold-Formed Steel Design Manual, Joshua Buckholt, Helen Chen 2018 Missouri University of Science and Technology

The 2017 Aisi Cold-Formed Steel Design Manual, Joshua Buckholt, Helen Chen

International Specialty Conference on Cold-Formed Steel Structures

The 2017 edition of AISI D100, the Cold-Formed Steel Design Manual (Manual) has been published. Updates to the Manual include: alignment with AISI S100-16, the North-American Specification for the Design of Cold-Formed Steel Structural Members (NA Specification); several new and varied design examples; additional discussions related to the design of cold-formed steel structures and components; and expanded bibliographies of relevant resources. The database of examples illustrating the Direct Strength Method (DSM) and new provisions in the NA Specification has been expanded. Also published with the Manual are the North-American Specification and its Commentary.


Wei-Wen Yu International Specialty Conference On Cold-Formed Steel Structures 2018: Recent Research And Developments In Cold-Formed Steel Design And Construction, Wei-Wen Yu Center for Cold-Formed Steel Structures 2018 Missouri University of Science and Technology

Wei-Wen Yu International Specialty Conference On Cold-Formed Steel Structures 2018: Recent Research And Developments In Cold-Formed Steel Design And Construction, Wei-Wen Yu Center For Cold-Formed Steel Structures

International Specialty Conference on Cold-Formed Steel Structures

No abstract provided.


A Preliminary Study On Stainless Steel Hollow Flange Beams Featuring Lateral-Distortional Buckling, Shuang Niu, Zhidong Zhang, Feng Fan 2018 Missouri University of Science and Technology

A Preliminary Study On Stainless Steel Hollow Flange Beams Featuring Lateral-Distortional Buckling, Shuang Niu, Zhidong Zhang, Feng Fan

International Specialty Conference on Cold-Formed Steel Structures

To explore the potential of using stainless steel structurally, extensive research has been carried out to study the structural behavior of stainless steel member as associated with the nonlinear stress-strain relationship. Hollow flange sections feature improved structural efficiency and a unique issue of web distortion. Steel hollow flange sections have been studied and commercially distributed (e.g. the very first HFB section and lately LSB section). As a proactive study, this paper investigates stainless steel hollow flange beams of double-symmetric section with numerical modeling and parametric analysis. The validity of the idealized FE model was verified with existing study on ...


Cold-Formed Steel Bolted Moment-Resisting Connections With Friction-Slip Mechanism For Seismic Areas, Marzie Shahini, Alireza Bagheri Sabbagh 2018 Missouri University of Science and Technology

Cold-Formed Steel Bolted Moment-Resisting Connections With Friction-Slip Mechanism For Seismic Areas, Marzie Shahini, Alireza Bagheri Sabbagh

International Specialty Conference on Cold-Formed Steel Structures

This paper presents investigation on cold-formed steel (CFS) beam-to-column moment-resisting (MR) bolted connections with high energy dissipation capacity suitable for seismic areas. Bolting friction-slip mechanism of the introduced CFS MR connection is developed as its main seismic energy dissipation fuse aiming to postpone or eliminate local buckling and yielding in the CFS MR connections. Finite Element (FE) modelling techniques are employed to effectively simulate the connections with an activated friction-slip mechanism. Hysteretic energy dissipation response of the connections with circular bolting (CB) arrangement designed to slip at 0.5Mp are presented. Based on the obtained FE results, full-scale physical tests ...


On The Effect Of Web Stiffening Of Cold-Formed Steel Thin-Walled Lipped Sigma Sections In Compression Members, Rashideddin Cheraghi, Hamidreza Mohammadzadeh 2018 Missouri University of Science and Technology

On The Effect Of Web Stiffening Of Cold-Formed Steel Thin-Walled Lipped Sigma Sections In Compression Members, Rashideddin Cheraghi, Hamidreza Mohammadzadeh

International Specialty Conference on Cold-Formed Steel Structures

Cold-formed steel cross sections are high strength thin-walled profiles which are highly prone to local and distortional instabilities. Stiffening techniques are utilized in the industry as a solution to enhance local and distortional buckling strengths. The sigma section is that channel section which its web pushed inward for the stiffening reason. In this research, the effect of side sway of the web (dx) on the buckling behavior of lipped sigma sections is investigated. The results demonstrate that stiffening inclined components of the web in lipped sigma sections for dx up to 0.5512”(14 mm) act as a stiffener and ...


Bracing Design For Torsional Bucking Of Cold-Formed Steel Wall Stud Columns, C. D. Moen 2018 Missouri University of Science and Technology

Bracing Design For Torsional Bucking Of Cold-Formed Steel Wall Stud Columns, C. D. Moen

International Specialty Conference on Cold-Formed Steel Structures

A method is presented for calculating the required brace stiffness and strength to limit torsional buckling deformation in cold-formed steel wall stud columns. The bracing (bridging) design method utilizes recent insight from classical stability solutions that define twist of singly and doubly-symmetric columns with an initial twist imperfection as a function of column compressive load. A wall stud design example is provided.


A Finite Element Study Of Corrugated Steel Deck Subjected To Concentrated Loads, Vitaliy V. Degtyarev 2018 Missouri University of Science and Technology

A Finite Element Study Of Corrugated Steel Deck Subjected To Concentrated Loads, Vitaliy V. Degtyarev

International Specialty Conference on Cold-Formed Steel Structures

An extensive parametric study was initiated to get a better understanding of steel deck behavior under concentrated loads and to develop design recommendations for a wide range of deck profiles. This paper presents first results from the study related to 1.5-in. deep roof decks of types B and F. The study was performed on non-linear finite element models of deck validated against available test data. Deck gage, span length, span condition, concentrated load locations along and across the deck span were varied in the study. The observed deck behavior under concentrated loads, as well as the effects of the ...


Bearing Strength Of Untightened Double-Shear Bolted Connections In Cold-Formed Steel Construction, Refat Bhuiyan, Lip H. Teh 2018 Missouri University of Science and Technology

Bearing Strength Of Untightened Double-Shear Bolted Connections In Cold-Formed Steel Construction, Refat Bhuiyan, Lip H. Teh

International Specialty Conference on Cold-Formed Steel Structures

This paper presents the experimental investigation of cold-formed steel double-shear bolted connections where both the bolt head and the nut are not in contact with the outer sheets. The inner sheet of each specimen is not constrained from out-of-plane distortion or bulging downstream of the bolt, and fails in bearing. Based on a series of tests involving specimens having bolt diameters ranging from 12 to 16 mm and sheet thicknesses ranging from 1.5 to 3.0 mm, it has been found that the absence of out-of-plane constraint in untightened bolted connections leads to much lower bearing capacities than predicted ...


Investigation On Shear Capacity For Screw Connections Of Cold-Formed Steel Framed Shear Walls With Steel Sheathing, Ruoqiang Feng, Ying Ma 2018 Missouri University of Science and Technology

Investigation On Shear Capacity For Screw Connections Of Cold-Formed Steel Framed Shear Walls With Steel Sheathing, Ruoqiang Feng, Ying Ma

International Specialty Conference on Cold-Formed Steel Structures

Experimental and numerical investigations were carried out to learn the shear capacities for screw connections of cold-formed steel framed shear walls with steel sheets for the base layer combined with gypsum wallboards for the face layer. The design methods of test specimens, the loading equipment and the data processing method were introduced. According the phenomenon of tests for multiple self-drilled screw connections, the loading-deformation curves, shear capacity and failure modes were testified. The influence of end distance of screw, edge distance of screw, diameter of screw, spacing of screw, thickness of steel sheets, thickness of gypsum wallboards, thickness of studs ...


Experimental And Analytical Studies Of Cold-Formed Steel Sections With Edge-Stiffened Circular Holes Subjected To Web Crippling, Asraf Uzzaman, James B. P. Lim, David Nash, Amir M. Yousefi, Benjamin Young 2018 Missouri University of Science and Technology

Experimental And Analytical Studies Of Cold-Formed Steel Sections With Edge-Stiffened Circular Holes Subjected To Web Crippling, Asraf Uzzaman, James B. P. Lim, David Nash, Amir M. Yousefi, Benjamin Young

International Specialty Conference on Cold-Formed Steel Structures

Cold-formed steel sections are often used as wall studs or floor joists and such sections often include web holes for ease of installation of services. The holes are normally punched or bored and are unstiffened; when the holes are near to points of concentrated load, web crippling can be the critical design consideration. Recently, a new generation of cold-formed steel channel sections with edge-stiffened circular holes has been developed. The web holes are stiffened through a continuous edge stiffener/lip around the perimeter of the hole. In this paper, a combination of experimental investigations and non-linear finite element analyses are ...


Low Fatigue Response Of Crest-Fixed Cold-Formed Steel Drape Curved Roof Claddings, Krishanu Roy, James B. P. Lim, Amir Mohammad Yousefi, G. Charles Clifton, Mahen Mahendran 2018 Missouri University of Science and Technology

Low Fatigue Response Of Crest-Fixed Cold-Formed Steel Drape Curved Roof Claddings, Krishanu Roy, James B. P. Lim, Amir Mohammad Yousefi, G. Charles Clifton, Mahen Mahendran

International Specialty Conference on Cold-Formed Steel Structures

Cold-formed steel roof claddings are subjected to significant suction/uplift pressures during high wind events. In New Zealand, the strong prevailing winds makes this a common occurrence. Suction pressures are generated by the turbulence of the wind flow around the building which can vary both spatially and temporally. The weakest link in the roofing system is the connection between roof sheeting and screw fasteners, which if fails, can lead to progressive collapse of the whole roofing assembly. Fluctuating high wind suction pressures can result in either static or fatigue pull-through failure of the roof sheeting at its screw fastener connections ...


Finite-Element Analysis Of The Eaves Joint Of Cold-Formed Steel Portal Frames Having Single Channel-Sections, Pouya Pouladi, John Ronaldson, George Charles Clifton, Jason Maxwell Ingham, Andrzej M. Wrzesien, Paul Milewski, James B. P. Lim 2018 Missouri University of Science and Technology

Finite-Element Analysis Of The Eaves Joint Of Cold-Formed Steel Portal Frames Having Single Channel-Sections, Pouya Pouladi, John Ronaldson, George Charles Clifton, Jason Maxwell Ingham, Andrzej M. Wrzesien, Paul Milewski, James B. P. Lim

International Specialty Conference on Cold-Formed Steel Structures

A finite element model is described for the eaves joint of a cold-formed steel portal frame that comprises a single channel section for the column and rafters eaves connections. The members are connected to the brackets through both screws and bolts. Such a joint detail is commonly used in practice in New Zealand and Australia, where the function of the screws is to prevent slip of the joint during frame erection since the bolt holes are detailed for nominal clearance. The results of the finite element model are compared against two experimental test results. In both, the critical mode of ...


Influence Of Fire On The Shear Capacity Of Cold-Formed Steel Framed Shear Walls, M. S. Hoehler, B. Andres 2018 Missouri University of Science and Technology

Influence Of Fire On The Shear Capacity Of Cold-Formed Steel Framed Shear Walls, M. S. Hoehler, B. Andres

International Specialty Conference on Cold-Formed Steel Structures

This paper presents experimental investigations of the performance of common lateral force-resisting systems used in cold-formed steel construction under sequential thermal (fire) and mechanical (earthquake) loading. Wall specimens with gypsum-sheet steel composite sheathing, Oriented Strand Board (OSB) sheathing, or steel strap bracing were tested. The results demonstrate that the lateral capacity of wall systems can be reduced by exposure to fire. Additionally, fire performance of wall systems can be affected by pre-damage to the fire-resistive components that provide fire protection to these walls. The results are useful for fire compartmentation design when significant lateral deformation of a building is anticipated ...


Planning The Future Of North American Cold-Formed Steel Design Standards, Benjamin W. Schafer, Jay Larson, Helen Chen 2018 Missouri University of Science and Technology

Planning The Future Of North American Cold-Formed Steel Design Standards, Benjamin W. Schafer, Jay Larson, Helen Chen

International Specialty Conference on Cold-Formed Steel Structures

Growth in cold-formed steel structures has long been tied to developing and advancing the engineering standards that govern their use in construction. The American Iron and Steel Institute (AISI) has taken a leadership role in this activity in North America since 1946. Conventional standards providing closed-formed solutions to member capacity, such as the recently completed suite of AISI Standards in 2015 and 2016. These standards have reached an impressive level of maturity given the complexity of designing entire (building) structural systems out of steel that is rarely greater than 2mm thick. However, the demands on the structural engineer designing cold-formed ...


Performance Of Cold-Formed Steel Shear Walls With Frame Blocking And Double-Sheathing, Robert Rizk, Vincent Briere, Veronica Santos, Colin A. Rogers 2018 Missouri University of Science and Technology

Performance Of Cold-Formed Steel Shear Walls With Frame Blocking And Double-Sheathing, Robert Rizk, Vincent Briere, Veronica Santos, Colin A. Rogers

International Specialty Conference on Cold-Formed Steel Structures

This paper summarizes a laboratory based research program on blocked and double-sheathed cold-formed steel framed shear walls. The intent was to develop walls whose in-plane shear resistance exceeds that of configurations currently listed in the AISI S400 Standard. The results showed that the frame blocking can be used in the construction of walls whose resistance is at the limit of that found in AISI S400; however, the blocking will not adequately restrain the framing members if thicker sheathing is used. An approach was needed to minimize the effect of the eccentric loading caused by the sheathing and to account for ...


Seismic Behavior Of Cold-Formed Steel Shear Walls During Full-Scale Building Shake Table Tests, X. Wang, Tara C. Hutchinson, G. Hegemier, Colin A. Rogers 2018 Missouri University of Science and Technology

Seismic Behavior Of Cold-Formed Steel Shear Walls During Full-Scale Building Shake Table Tests, X. Wang, Tara C. Hutchinson, G. Hegemier, Colin A. Rogers

International Specialty Conference on Cold-Formed Steel Structures

Cold-formed steel sheathed shear walls are now emerging as a strategic vertical lateral load resisting component in seismic design. However, although a number of component cyclic test programs have been conducted in recent years to characterize their hysteretic behavior and guide design, system-level test programs to investigate their performance are so far lacking in the literature. To this end, a unique full-scale CFS-framed mid-rise building shake table test program was conducted to contribute to understanding the behavior of mid-rise cold-formed steel (CFS) wall-braced buildings under a multi-hazard scenario. The centerpiece of this project involved earthquake and live fire testing of ...


Cold-Formed Steel Framed Shear Wall Database, Deniz Ayhan, Samuel Baer, Zhidong Zhang, Colin A. Rogers, Benjamin W. Schafer 2018 Missouri University of Science and Technology

Cold-Formed Steel Framed Shear Wall Database, Deniz Ayhan, Samuel Baer, Zhidong Zhang, Colin A. Rogers, Benjamin W. Schafer

International Specialty Conference on Cold-Formed Steel Structures

The objective of this paper is to provide an introduction to a recently compiled database of cold-formed steel framed shear wall tests and demonstrate the application of this database for improving the understanding and modeling of cold-formed steel framed shear walls. Over the last 20 years a substantial number of cold-formed steel framed shear walls have been tested under monotonic and cyclic conditions. These tests provide the support for the cold-formed steel framed shear wall provisions provided in the North American Standard for Cold-Formed Steel Structural Framing (AISI S240-15), the North American Standard for Seismic Design of Cold-Formed Steel Structural ...


Shear Resistance Mechanisms On Steel Sheet Shear Walls With Burring Holes And Cross-Rails, Yoshimichi Kawai, Kazunori Fujihashi, Shigeaki Tohnai, Atsushi Sato, Tetsuro Ono 2018 Missouri University of Science and Technology

Shear Resistance Mechanisms On Steel Sheet Shear Walls With Burring Holes And Cross-Rails, Yoshimichi Kawai, Kazunori Fujihashi, Shigeaki Tohnai, Atsushi Sato, Tetsuro Ono

International Specialty Conference on Cold-Formed Steel Structures

Steel sheet shear walls with burring holes are employed in low and mid-rise buildings in seismically active regions. A configuration with burrs on the inside enables the thinner wall and omitting the machining of equipment holes. The effects of cross-rails which are generally designed to strengthen the bearing capacities of the studs, on 2.73~4.53m height shear walls were clarified by finite element analysis and experiments. Post-buckling behavior depends on tension fields restrained by the cross-rails. The formulas of the allowable strengths and the indexes of ultimate strengths were developed using the mechanisms.


Behavior Of Cold-Formed Steel Metal Industrial Buildings, Adrianna M. Early, M. Ebrahim Mohammadi, Richard L. Wood, Kara D. Peterman 2018 Missouri University of Science and Technology

Behavior Of Cold-Formed Steel Metal Industrial Buildings, Adrianna M. Early, M. Ebrahim Mohammadi, Richard L. Wood, Kara D. Peterman

International Specialty Conference on Cold-Formed Steel Structures

This paper presents research focused on understanding the observed behavior of cold-formed steel (CFS) metal buildings during Hurricane Harvey, which made landfall Friday, August 25, 2017 between Port Aransas and Port O’Connor, Texas. Through the Geotechnical Extreme Event Reconnaissance (GEER) association (funded by the National Science Foundation) a team of structural engineers and researchers performed rapid and detailed assessments of structural damage caused by the hurricane. The National Science Foundation gathered photographs, damage assessments sheets, and three-dimensional laser point cloud data of severely damaged cold-formed steel industrial buildings. The Port Aransas County Airport experienced severe damage to several cold-formed ...


Optimum Slot Weld Width For Cold-Formed Steel, Emilee A. Martin, Fredrick R. Rutz 2018 Missouri University of Science and Technology

Optimum Slot Weld Width For Cold-Formed Steel, Emilee A. Martin, Fredrick R. Rutz

International Specialty Conference on Cold-Formed Steel Structures

Slot welds can be used for connections in cold-formed steel (CFS) structures. However, structural engineers will find AISI S100, “North American Specification for the Design of Cold-Formed Steel Structural Members” (AISI 2016) - which can be used for guidance in calculating structural capacity of many welds types - silent on this specific application.

Research at the University of Colorado Denver has been directed toward determination of the strength of slot welds in sheet steel. A comprehensive series of tests were performed to determine structural capacity and ductility of various slot weld widths using a metal inert gas (MIG) welding process. A slot ...


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