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3,138 full-text articles. Page 9 of 89.

Cyclic Performance And Behavior Characterization Of Steel Deck Sidelap And Framing Connections, S. Torabian, D. Fratamico 2018 Missouri University of Science and Technology

Cyclic Performance And Behavior Characterization Of Steel Deck Sidelap And Framing Connections, S. Torabian, D. Fratamico

International Specialty Conference on Cold-Formed Steel Structures

A wide variety of steel deck sidelaps and framing connections have been experimentally studied to characterize the cyclic performance required in seismic evaluation of steel deck diaphragms. This study intends to provide cyclic test results of common steel deck connections including screw nestable and top arc seam sidelaps; and powder actuated fasteners, arc spot weld, and arc seam weld framing connections. A total of 24 sidelap and 36 framing connection tests have been performed in the Thin-Walled Structures Laboratory at Johns Hopkins University by NBM Technologies. The connection test results have been used to parameterize a nonlinear hysteretic spring element ...


Screw And Pin Fastener Tests For Cold-Formed Steel, Brian S. Wilson, Fredrick R. Rutz, James R. Harris 2018 Missouri University of Science and Technology

Screw And Pin Fastener Tests For Cold-Formed Steel, Brian S. Wilson, Fredrick R. Rutz, James R. Harris

International Specialty Conference on Cold-Formed Steel Structures

Because of limited available information on strength and ease of installation of specific fasteners for a particular application to a steel deck diaphragm, a preliminary testing program comparing the shear strength of commercially available screws and gas-actuated shot pins was conducted by J. R. Harris and Company at the University of Colorado Denver in 2018. A test was designed to explore the behavior and capacity of various fasteners, securing two and three pieces of sheet steel of various thicknesses together. Specimens were fabricated and load tested, with the sheet steel pieces in tension, so the fasteners were subject to shear ...


Sustainability Of Modular Lightweight Steel Building From Design To Construction, Ornella Iuorio, Loredana Napolano, Luigi Fiorino, Raffaele Landolfo 2018 Missouri University of Science and Technology

Sustainability Of Modular Lightweight Steel Building From Design To Construction, Ornella Iuorio, Loredana Napolano, Luigi Fiorino, Raffaele Landolfo

International Specialty Conference on Cold-Formed Steel Structures

The increasing concerns over population growth, depletion of natural resources and global warming as well as catastrophic natural events is leading the international scientific community to envisage sustainability as a crucial goal. The built environment plays a key role on the triple bottom line of the sustainable development -- Planet, People, Profit -- because of several environmental, social and economic impacts produced by the construction sector. The acknowledged need to promote a sustainable building market is an international high-priority issue as underlined by the 2030 Agenda for Sustainable Development. Indeed one of its strategic objectives highlights to make cities and human settlement ...


Experimental Study On Uplift Capacity Of Purlins Considering Restraints From Standing Seam Roof Systems, Wei Luan, Yuanqi Li 2018 Missouri University of Science and Technology

Experimental Study On Uplift Capacity Of Purlins Considering Restraints From Standing Seam Roof Systems, Wei Luan, Yuanqi Li

International Specialty Conference on Cold-Formed Steel Structures

A total of 32 specimens of single-span purlin roof assemblies considering uplift wind load were tested to investigate the structural behavior of cold-formed steel purlins with one flange fastened to standing seam roofs. Failure modes and failure loads of purlins with different parameters were obtained. Full finite element models, incorporate purlins, clips and standing seam roof panels, were developed, and the analysis results were consistent to a high degree with the test results. Using the same element type and material model, the rotational restraint of test roof systems and corresponding influence factors were investigated by finite element models. Finally, using ...


The Design And Development Of Lightweight Composite Panels For Rigid Wall Structures, Jeremy J. Artman, Cheng Yu 2018 Missouri University of Science and Technology

The Design And Development Of Lightweight Composite Panels For Rigid Wall Structures, Jeremy J. Artman, Cheng Yu

International Specialty Conference on Cold-Formed Steel Structures

The paper presents a research effort aimed at developing a stronger, lighter, and more economic shelter for both military and civilian use. Reported herein are the research results on developing solid wall panels using cold-formed steel corrugated sheathing and members, as well as polyurethane spray foam for insulation. This research includes calculating uniform load density, determining the overall strength of the panel, and investigating the flexural strength of the roof panels. Research incorporated different connection methods, with varied stud spacing, to determine the safest design for the new mobile facilities. Previous research has shown that cold-formed steel corrugated sheathing performs ...


Localised Screw Connection Failures In Cold-Formed Steel Roofing Systems, Mayooran Sivapathasundaram, Mahen Mahendran 2018 Missouri University of Science and Technology

Localised Screw Connection Failures In Cold-Formed Steel Roofing Systems, Mayooran Sivapathasundaram, Mahen Mahendran

International Specialty Conference on Cold-Formed Steel Structures

Lightweight roofing systems made of thin and high strength steel roof sheeting and battens are commonly used in low-rise buildings. However, they often fail frequently at their screw fastener connections during wind storms due to inadequate connection capacities. Two localised failures, known as pull-through and pull-out failures at the screw fastener connections, have been the root cause for extensive loss of roofing systems under high wind uplift loads. Such premature connection failures often cause partial or even complete loss of steel roofing systems and severe damage to building contents. Therefore many experimental studies have been conducted to investigate the pull-through ...


Design Of Rivet Fastened Rectangular Hollow Flange Channel Beams Subject To Local Buckling, L. Sundararajah, M. Mahendran, P. Keerthan 2018 Missouri University of Science and Technology

Design Of Rivet Fastened Rectangular Hollow Flange Channel Beams Subject To Local Buckling, L. Sundararajah, M. Mahendran, P. Keerthan

International Specialty Conference on Cold-Formed Steel Structures

The innovative, rivet fastened Rectangular Hollow Flange Channel Beam (RHFCB) is a new type of cold-formed steel section, proposed as an extension to the widely researched hollow flange beams. The hollow flange beams have garnered much interest in the past due to the sections having capacities more typically associated with hot-rolled steel sections. Various researches have been carried out to investigate the behavior of continuously welded hollow flange beams but little is known on the behavior of RHFCBs. The structural behaviour of the RHFCB is unique compared to other conventional cold-formed steel sections and its moment capacity reduces with rivet ...


Finite Element Modeling And Validation Of Steel Sheathed Cold-Formed Steel Framed Shear Walls, Amanpreet Singh, Tara C. Hutchinson 2018 Missouri University of Science and Technology

Finite Element Modeling And Validation Of Steel Sheathed Cold-Formed Steel Framed Shear Walls, Amanpreet Singh, Tara C. Hutchinson

International Specialty Conference on Cold-Formed Steel Structures

The objective of this paper is to validate the concept of utilizing a truss-element based finite element model for capturing the in-plane cyclic response of steel sheathed cold-formed steel (CFS) framed shear wall. The model is developed within the OpenSees finite element platform. Steel sheathed CFS shear walls show shear buckling of their sheathing as a tension field develops. This inelastic behavior of the shear walls is replicated by using the Pinching4 material for truss elements acting along the tension field. Importantly, the model employs beam-column elements for framing members, rotational springs for representing frame stiffness and vertical springs for ...


Distortional Buckling Of Cold-Formed Steel Flanges Under Stress Gradient, Robert S. Glauz 2018 Missouri University of Science and Technology

Distortional Buckling Of Cold-Formed Steel Flanges Under Stress Gradient, Robert S. Glauz

International Specialty Conference on Cold-Formed Steel Structures

The strength of cold-formed steel beams with stiffened flanges may be controlled by distortional buckling. Buckling stress prediction methods have been developed for flanges under uniform compression. However, channel sections are commonly used where bending occurs about the minor axis with flanges under stress gradient, such that the edges are in compression and the flanges may experience distortional buckling. Current design specifications do not explicitly address this failure mode, which could lead to unsafe designs. This paper presents and verifies an analytical approach for distortional buckling stress prediction for flanges under stress gradient. The approach is consistent with the design ...


Flexural Strength Of Continuous-Span Z-Purlins With Paired Torsion Braces Using The Direct Strength Method, Michael Seek 2018 Missouri University of Science and Technology

Flexural Strength Of Continuous-Span Z-Purlins With Paired Torsion Braces Using The Direct Strength Method, Michael Seek

International Specialty Conference on Cold-Formed Steel Structures

A procedure is presented to calculate the local and distortional flexural buckling strength of continuous span purlins with paired torsion braces using the Direct Strength Method. Displacement compatibility is utilized to determine the forces interacting between the purlin, the flexible diaphragm and the torsion braces. The biaxial bending and torsion effects caused by this interaction are superimposed, and the actual distribution of stresses within the cross section are calculated at critical locations along the span. With this distribution of stresses, a finite strip buckling analysis is performed to determine the local and distortional buckling strength. In current design practice, results ...


Using Generalized Beam Theory To Assess The Behavior Of Curved Thin-Walled Members, Nuno Peres, Rodrigo Goncalves, Dinar Camotim 2018 Missouri University of Science and Technology

Using Generalized Beam Theory To Assess The Behavior Of Curved Thin-Walled Members, Nuno Peres, Rodrigo Goncalves, Dinar Camotim

International Specialty Conference on Cold-Formed Steel Structures

In this work, the first-order behavior of naturally curved thin-walled bars with circular axis, without pre-twist, is assessed with the help of the Generalized Beam Theory (GBT) formulation previously developed by the authors. With respect to the previous work, which dealt with simple cross-sections, the present paper presents a method to obtain the deformation modes for arbitrary flat-walled cross-sections. Despite the complexity involved in this generalization, the standard GBT kinematic assumptions are kept, since they are essential to (i) subdivide the modes in a meaningful way and (ii) reduce the number of DOFs necessary to obtain accurate solutions. It is ...


Cold-Formed Ferritic Stainless Steel Tubular Sections Under End-One-Flange Loading Condition, Hai-Ting Li, Benjamin Young 2018 Missouri University of Science and Technology

Cold-Formed Ferritic Stainless Steel Tubular Sections Under End-One-Flange Loading Condition, Hai-Ting Li, Benjamin Young

International Specialty Conference on Cold-Formed Steel Structures

This paper presents experimental and numerical investigations of cold-formed ferritic stainless steel tubular sections under End-One-Flange (EOF) loading condition. A series of web crippling tests was conducted on cold-formed square and rectangular hollow sections of ferritic stainless steel grade EN 1.4003. The web crippling test results were used for the verification of the finite element (FE) model. Upon verification, a parametric study was performed thereafter. The codified web crippling design provisions in American, Australian/New Zealand and European standards for stainless steel structures were assessed. Improved web crippling design rules are proposed for cold-formed ferritic stainless steel tubular sections ...


New Proposals For The Direct Strength Method Of Design Of Cold-Formed Steel Beams With Holes In Shear, Song Hong Pham, Cao Hung Pham, Colin A. Rogers, Gregory J. Hancock 2018 Missouri University of Science and Technology

New Proposals For The Direct Strength Method Of Design Of Cold-Formed Steel Beams With Holes In Shear, Song Hong Pham, Cao Hung Pham, Colin A. Rogers, Gregory J. Hancock

International Specialty Conference on Cold-Formed Steel Structures

In the latest North American Specification for the design of cold-formed steel structural members AISI S100-16, an empirical approach is specified to design beams with web holes in shear. Recently, a Direct Strength Method (DSM) of design for shear for perforated beams with the aspect ratio (shear span / web depth) of 1.0 has been proposed. This paper presents a comprehensive review of the proposal and an experimental validation using a test series on beams with the aspect ratio of 2.0 and with various square and circular web opening sizes conducted at the University of Sydney, and other experimental ...


Experimental Study Of Apex Connection Stiffness And Strength Of Cold-Formed Steel Double Channel Portal Frames, J. Peng, J. Bendit, H. B. Blum 2018 Missouri University of Science and Technology

Experimental Study Of Apex Connection Stiffness And Strength Of Cold-Formed Steel Double Channel Portal Frames, J. Peng, J. Bendit, H. B. Blum

International Specialty Conference on Cold-Formed Steel Structures

Cold-formed steel portal frames are an increasingly popular structure in the housing and industrial sectors, and are commonly used for garages, sheds, and shelters. Longer span cold-formed steel portal frames are relatively new to the market, and as a result limited design guidance and recommendations exist, including the strength and stiffness of the connections. The apex connection stiffness affects the distribution of internal actions and deflections of a portal frame, and therefore, it is necessary to quantify the apex stiffness for use in design models to accurately determine the frame behavior. An experimental program was carried out on a series ...


Proposal To Improve The Dsm Design Of Cold-Formed Steel Angle Columns: Need, Background, Quality Assessment And Illustration, Pedro Borges Dinis, Dinar Camotim 2018 Missouri University of Science and Technology

Proposal To Improve The Dsm Design Of Cold-Formed Steel Angle Columns: Need, Background, Quality Assessment And Illustration, Pedro Borges Dinis, Dinar Camotim

International Specialty Conference on Cold-Formed Steel Structures

This paper presents a proposal for the codification of an efficient design approach, based on the Direct Strength Method (DSM), for cold-formed steel equal-leg angle columns with short-to-intermediate lengths, i.e., those buckling in flexural-torsional modes. Initially, the available experimental failure load data, comprising fixed-ended and pin-ended (“cylindrical hinges”) columns with several geometries (cross-section dimensions and lengths) and tested by various researchers, are collected and used to show that the currently codified DSM design provisions are not able to handle adequately short-to- intermediate angle columns and that a specific DSM-based design approach is needed to estimate the failure loads of ...


New Web Crippling Design Rules For Cold-Formed Steel Beams, L. Sundararajah, M. Mahendran, P. Keerthan 2018 Missouri University of Science and Technology

New Web Crippling Design Rules For Cold-Formed Steel Beams, L. Sundararajah, M. Mahendran, P. Keerthan

International Specialty Conference on Cold-Formed Steel Structures

Lipped channel beams (LCBs) and SupaCee sections are commonly used as floor joists and bearers in the construction industry. SupaCee section is one of the cold-formed steel members, which is increasingly used in the building construction sector. It is characterized by unique ribbed web and curved lip elements, and is claimed to be more economical with extra strength than the traditional channel sections. These thin-walled LCBs and SupaCee sections are subjected to specific local and global failures, one of them being web crippling. Several experimental and numerical studies have been conducted in the past to study the web crippling behaviour ...


Comparison Of Experimental And Numerical Results For Flexural Capacity Of Light-Gage Steel Roof Deck, Christopher H. Raebel, Dawid Gwodzdz 2018 Missouri University of Science and Technology

Comparison Of Experimental And Numerical Results For Flexural Capacity Of Light-Gage Steel Roof Deck, Christopher H. Raebel, Dawid Gwodzdz

International Specialty Conference on Cold-Formed Steel Structures

The objective of this paper is to present a comparison between experimental results to each of two numerical analyses of cold formed steel roof deck in flexure. Prior numerical studies using the Direct Strength Method (DSM) and the Equivalent Width Method (EWM) have shown discrepancies between results obtained by the two methods. The goal of this research initiative was to compare results from each of the two numerical analysis methods to experimental results in an effort to determine which numerical method is most appropriate for analyzing steel deck in flexure.

Twenty-four physical tests were conducted using four different deck gages ...


Parametric Studies And Design Recommendations 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

Parametric Studies And Design Recommendations 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

A parametric study of cold-formed steel sections with edge-stiffened circular holes subjected to web crippling under one-flange loading condition was undertaken using finite element analysis. The effect of different hole sizes, edge-stiffener length and distances of the web holes to the near edge of the bearing plate on the web crippling strengths of channel sections were investigated. The web crippling strengths are influenced by various geometry parameters: the ratio of the hole depth to the flat portion of the web, a/h, the location of the hole as defined by the distance of the hole from the edge of the ...


Study On Distortional Buckling Of Cold-Formed Stainless Steel Beams, Shuang Niu, Zhidong Zhang, Feng Fan 2018 Missouri University of Science and Technology

Study On Distortional Buckling Of Cold-Formed Stainless Steel Beams, Shuang Niu, Zhidong Zhang, Feng Fan

International Specialty Conference on Cold-Formed Steel Structures

In the current research, distortional buckling of cold-formed stainless steel open-section beams was investigated. Four-point bending tests of eight C-section stainless steel beams, made of S30401 alloy, were carried out with global and local buckling precluded by careful design of specimen and test rigs. A detailed finite element model based on ABAQUS was developed and verified against test data. Parametric study was carried out with the verified model, covering four types of sections (C, Z, SupaCee, and SupaZed), three stainless steel alloys (S30401, S44330, S32101), and a series of section slenderness. A convenient method to identify distortional buckling point in ...


Experimental Investigation Into The Behavior Of Back-To-Back Gapped Built-Up Cold-Formed Steel Channel Sections Under Compression, Krishanu Roy, Tina Chui Huon Ting, Hieng Ho Lau, James B. P. Lim 2018 Missouri University of Science and Technology

Experimental Investigation Into The Behavior Of Back-To-Back Gapped Built-Up Cold-Formed Steel Channel Sections Under Compression, Krishanu Roy, Tina Chui Huon Ting, Hieng Ho Lau, James B. P. Lim

International Specialty Conference on Cold-Formed Steel Structures

Back-to-back gapped built-up cold-formed steel channel-sections are used as compression members in cold-formed steel structures, such as trusses, space frames and portal frames etc. Because of the complex and non-uniform cross section of the back-to-back gapped built- up cold-formed steel channel columns, it is difficult to calculate the strength of these sections accurately. Current guidance by the direct strength method in the AISI Specification and the Australian/New Zealand Standard doesn’t include the gap between the back-to-back channels, thus not being able to predict the axial capacities of these sections accurately. In the literature, very few results have been ...


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