Experimental and numerical analysis of cold-formed steel floor trusses with concrete filled compression chord

Baran, Eray
Topkaya, Cem
© 2021 Elsevier LtdFloor trusses fabricated from cold-formed steel (CFS) sections offer several advantages over more conventional floor systems. The current paper reports the findings of an integrated experimental and numerical study focusing on the behavior of CFS floor trusses made of lipped channel sections with the compression chord member filled with concrete. This type of configuration occurs when CFS trusses are used together with a cast-in-place concrete slab. The experimental part of the study included load testing of seven full-scale CFS floor trusses, while numerical investigation included three-dimensional finite element modeling of these trusses. An analytical procedure based on a simple linear-elastic mechanics approach was also developed in an attempt to predict the response of steel-concrete composite CFS trusses without the need of detailed FE analysis or physical testing. Test results indicate that presence of concrete infill inside the compression chord member prevented the initiation of chord local/distortional buckling. In these specimens the failure mode was tension yielding of the bottom chord member. With the introduction of concrete infill within compression chord, significant improvement in truss response in terms of increase in stiffness and load capacity was obtained. The increase in load capacity was 41% and 46% depending on the orientation of the compression chord member. Presence of a concrete slab resulted in an additional 27% increase in load capacity. Truss response predicted by nonlinear FE analyses agrees well with the measured response, both in terms of global load-deflection behavior and chord strains.
Engineering Structures


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...
Vulnerability assessment of reinforced concrete moment resisting frame buildings
Erduran, Emrah; Yakut, Ahmet (2007-04-01)
A detailed seismic performance assessment procedure has been developed for reinforced concrete (RC) frame buildings with masonry infill walls. The procedure is based on member damage functions, in terms of interstory drift ratios. These functions are developed for the primary components, namely, columns, beams, and infill walls. For developing these functions, analytical investigations to determine the influence of several parameters on the damageability of components were combined with experimental data. A...
Analytical study on seismic retrofitting of reinforced concrete buildings using steel braces with shear link
Durucan, Cengizhan; Dicleli, Murat (2010-10-01)
This paper is focused on a proposed seismic retrofitting system (PRS) configured to upgrade the performance of seismically vulnerable reinforced concrete (RC) buildings. The PRS is composed of a rectangular steel housing frame with chevron braces and a yielding shear link connected between the braces and the frame. The retrofitting system is installed within the bays of an RC building frame to enhance the stiffness, strength and ductility of the structure. The PRS and a conventional retrofitting system usin...
Experimental evaluation of the in-plane behaviour of masonry wall infilled RC frames
Suzuki, Tomomi; Choi, Ho; Sanada, Yasushi; Nakano, Yoshiaki; Matsukawa, Kazuto; Paul, Devjyoti; Gulkan, Polat; Binici, Barış (2017-10-01)
This study focuses on the in-plane behaviour of unreinforced masonry (URM) infill walls installed in reinforced concrete (RC) frames. Five 1/4-scale model frames were designed based on a prototype RC building with URM infill walls in Turkey. The experimental parameters were the layout of the URM infill (its presence or absence), number of spans (single or double), number of stories (single or double), and stacking pattern of the URM infill (horizontal or vertical). Static cyclic loading tests were conducted...
Experimental investigation of uplift on seismic base isolators /
Erkakan, Evren; Caner, Alp; Department of Civil Engineering (2014)
Elastomeric rubber bearings reinforced with steel shims, are used to provide structural support in vertical direction and allow horizontal movements for the structure subjected to earthquake and thermal loads. Generally, it is known that tensile stress or uplift may occur when the structure is subjected to strong ground motion or structure have large height-to-width aspect ratio to develop a stability concern subjected to lateral loads. The main focus of this research is to investigate the change in charact...
Citation Formats
H. GÜLDÜR, E. Baran, and C. Topkaya, “Experimental and numerical analysis of cold-formed steel floor trusses with concrete filled compression chord,” Engineering Structures, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85100683308&origin=inward.