Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"cold-formed"”.
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Reliability based criteria for cold-formed steel members
… Design (ASD)" method has long been used for cold-formed steel structural members in the United States and other countries. In this approach, member forces, or moments, determined on the basis of working loads should not exceed the allowable values. The allowable value is used to prevent the …
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Resistance Factor for Cold-Formed Steel Compression Members
… if the LRFD strength reduction factor for cold-formed steel compression members can be increased above its current value of Ï c = 0.85, which was established by the LRFD Cold-Formed Steel Design Manual (1991) on the basis of 264 column tests. The resistance factor in the Canadian code for …
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Experiments on Cold-Formed Steel Beams with Holes
… testing and elastic buckling studies were performed on 68 C-section cold-formed steel joists with unstiffened rectangular web holes. Four Steel Stud Manufacturers Association (SSMA) cross-section types; 800S200-33, 800S200-43, 1000S162-54, and 1200S162-97, were evaluated to explore the …
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Web crippling of high strength cold-formed steel beams
<p>"The structural behavior of high strength cold-formed steel beams subjected primarily to web crippling was investigated analytically and experimentally. In this study hat sections and I-beams, formed from five different types of high strength sheet steels commonly used in the automobile …
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Damage and repair evolution of cold formed linepipe steel
… the internal micro damage accumulated during cold deformation and the degree of reduction of damage that can be achieved by heat treatment of linepipe steel. A set of unified viscoplastic constitutive equations was developed to simulate microstructural evolution and the effect on mechanical …
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Development of a Novel Cold-Formed Steel Truss System
In recent years, cold-formed (CFS) trusses have gained popularity due to many advantages such as being lightweight, non-combustible, termite and rot resistant, flexible in design, and ease of handling and fabrication. Often CFS trusses are designed and assembled at a plant and then transported to …
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Development of performance sections for cold-formed steel residential construction
The wider use of cold-formed steel framing is hindered by the lack of generic sections. This study puts forth an effort to develop a performance section designation code without specifying the geometry of the sections. A PC-based program to analyze C-section was developed and used to produce …
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Structural and thermal performance of cold-formed steel studs with slits
Cold-formed steel (CFS) studs in lightweight construction increasingly incorporate web slits to limit thermal bridging, yet these openings can reduce axial strength. This thesis integrates structural and thermal assessments through validated non-linear elasto-plastic finite element analysis (FEA) …
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The structural behavior of cold-formed steel members with perforated elements
… of perforations on the structural behavior of cold-formed steel structural members. Since in many cases, the load-carrying capacity of cold-formed steel members depends on the buckling behavior of individual component elements, emphasis has been concentrated on the study of the instability and …
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Performance Evaluation of Cold -Formed Steel Braced Frames for Seismic Loads
A series of 2-, 4- and 6-story buildings were designed and evaluated using the proposed method. It was found that 4- and 6-story buildings design and configured based on current provisions using an R factor of 4 did not satisfy the design objective. This resulted mainly from excessive drift demands …
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Performance of cold formed welded tubular steel joints under moment loading
Although exhibiting many superior properties to open sections structural hollow sections (SHS) have seen limited application in structures where joints resist moments. Their application has remained largely in truss type and lattice type structures where pinned joints are assumed. However, SHS have …
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Load and resistance factor design of cold-formed stainless steel structural members
… as well for the design of structural members cold-formed from carbon and low alloy steels. This design method is based on the "Limit States Design" philosophy, which is related to the ultimate strength and serviceability of the structural members and connections.</p> <p>Cold-formed stainless …
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Screw-Fastened Cold-Formed Steel-to-Steel Shear Connection Behavior and Models
… angle and limit states of single-fastened cold-formed steel-to-steel shear connections. Predictions are validated through an experimental study considering ply configuration and a single Hex #10 -washer head fastener, centered in a 102 mm by 102 mm three boundary window. The fastener …
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Strengthening of cold-formed steel channels using different reinforcing options and innovative connections
Cold-formed steel (CFS) has become an essential material in modern construction due to its lightweight, cost-effectiveness, and versatility. This study primarily investigated the web crippling capacity of channels with elongated edge-stiffened web holes. Compared to traditional circular …
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The effects of corner radii on the local buckling of cold-formed sections
… widely known but is growing in acceptance, is cold-forming from steel sheet or strip using roll-forming machines, press and bending brakes, or folding operations. These cold-form steel sections have their own design codes. The use of cold-formed structures in building constructions goes back to …
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Monotonic and Cyclic Simulation of Screw-Fastened Connections for Cold-Formed Steel Framing
… modeling the monotonic and cyclic response of cold-formed steel framing screw-fastened connections in commercial finite element programs. The model proposed and verified herein lays the groundwork for seismic modeling of cold-formed steel (CFS) framing including shear walls, gravity walls, …
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Floor Vibration Design Criterion For Cold-Formed C-Shaped Supported Residential Floor Systems
… to normal human activity was investigated for cold-formed C-shaped residential floors systems. Dynamic impact and static loading tests were performed on twelve full size laboratory floors and five two-joist line laboratory floors to determine the influencing characteristics of annoying …
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Experimental and Analytical Studies of the Behavior of Cold-Formed Steel Roof Truss Elements
Cold-formed steel roof truss systems that use complex stiffener patterns in existing hat shape members for both top and bottom chord elements are a growing trend in the North American steel framing industry. When designing cold-formed steel sections, a structural engineer typically tries to improve …
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A Framework for Cyclic Simulation of Thin-Walled Cold-Formed Steel Members in Structural Systems
… efficient seismic analysis framework for cold-formed steel (CFS) framed-buildings supported by hysteretic nonlinear models for CFS members and screw-fastened connections. Design of CFS structures subjected to lateral seismic forces traditionally relies on the strength of subassemblies …
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