Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Experimental and analytical investigation of cold-formed steel floor trusses under gravity loading
Download
index.pdf
Date
2017
Author
Dizdar, Çağan
Metadata
Show full item record
Item Usage Stats
249
views
94
downloads
Cite This
Cold-Formed Steel structures are getting increasingly popular in the market with their economic and short construction duration advantages. One of the most common floor system used in CFS buildings utilizes trusses made of CFS members. Despite their increasing use, behavior of CFS floor trusses has been the subject of very limited research. The governing failure mode of these structures under gravity loading is usually local buckling of compression chord elements. Therefore, a reliable design of such structures requires accurate determination of force effects and realistic estimation of CFS member capacities. The current study aims at investigating the validity of analysis assumptions and design techniques currently used for CFS floor trusses. Effect of parameters, such as connection detail at diagonal-chord joints, number of fasteners used at each diagonal-chord connection, CFS member thickness and the presence of OSB sheathing plate were studied as part of the experimental program. The focus of the study was twofold: truss stiffness and truss load capacity. Truss stiffness was studied in relation to the stiffness of diagonal-chord connections. With the incorporation of joint axial flexibility, the truss stiffness predictions were observed to accurately represent the measured response. In regards to the accurate determination of truss load capacity, both the normal force and bending moment effects on chord members were considered. Experimental and numerical results indicate the presence of significant bending effect on truss chord members. A simple procedure was established in order to quantify this effect and determine the value of chord bending moment. In the proposed procedure maximum bending moment occurred on truss chord members was calculated using imaginary loading, which was determined based on truss midspan deflection. The normal force and bending moment effects on chord members were considered together with the corresponding capacities determined based on the code provisions. Truss load capacities obtained through this procedure were observed to accurately represent the measured capacities.
Subject Keywords
Steel, Structural.
,
Strains and stresses.
,
Joints (Engineering).
,
Loads (Mechanics).
URI
http://etd.lib.metu.edu.tr/upload/12620960/index.pdf
https://hdl.handle.net/11511/26440
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Experimental and numerical investigation of cfs-concrete composite trusses
Güldür, Hazal; Baran, Eray; Department of Civil Engineering (2018)
Cold-formed steel (CFS) structural systems have been intensely studied especially due to the economy and ease of implementation that they provide. A common failure mode of CFS members is the local instability of the section. The aim of this study is to control the local instability in CFS floor trusses by providing concrete infill inside compression chord members. Numerical and experimental studies were conducted in order to investigate the flexural behavior of steel-concrete composite trusses made of CFS s...
Experimental investigation of structural systems made of sheathed cold-formed steel wall panels
Pehlivan, Barış Mert; Baran, Eray; Department of Civil Engineering (2023-1-12)
Cold-formed steel (CFS) structural systems are considered to be an innovative and newly developing construction method. Because of advantages such as lower fabrication periods, high strength/weight ratio and ease of construction, CFS structural systems have been used increasingly all around the world, including seismically active areas. Although there have been many studies in the literature, CFS structural systems are relatively new for the civil engineering practice and few existing specifications regardi...
Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining
El-Atwani, Osman; Kim, Hyosim; Gigax, Jonathan G.; Harvey, Cayla; Aytuna, Berk; Efe, Mert; Maloy, Stuart A. (2021-10-01)
Beyond the current commercial materials, refining the grain size is among the proposed strategies to manufacture resilient materials for industrial applications demanding high resistance to severe environments. Here, large strain machining (LSM) was used to manufacture nanostructured HT-9 steel with enhanced thermal stability, mechanical properties, and ductility. Nanocrystalline HT-9 steels with different aspect rations are achieved. In-situ transmission electron microscopy annealing experiments demonstrat...
Improving the strength of additively manufactured objects via modified interior structure
Al, Can Mert; Yaman, Ulaş; Department of Mechanical Engineering (2018)
This thesis study provides an approach to improve the durability of additively manufactured parts via modified interior structures by considering the stress field results from tensile loading conditions. In other words, the study provides an automated method, i.e., implicit slicing method, which improves the strength of the parts with infill structures modified according to the quasi-static Finite Element Analysis (FEA) results under tensile loadings, automatically. The parts which are used throughout the w...
Experimental investigation on seismic behavior of eccentric reinforced concrete beam-column-slab connections
Canbolat, Burcu B.; Wight, James K. (2008-03-01)
Design recommendations for reinforced concrete beam-column connections are based on limited experimental studies on the seismic behavior of eccentric connections. To supplement existing information, an experimental study was conducted that focused on the affect of eccentricity of spandrel beams with respect to the column. Specimens included a floor slab and transverse beams to evaluate the effect of slab participation. Test results indicated that including the floor system significantly reduced the negative...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Ç. Dizdar, “Experimental and analytical investigation of cold-formed steel floor trusses under gravity loading,” M.S. - Master of Science, Middle East Technical University, 2017.