Experimental Investigations on Spot Welded Built-Up Cold-Formed Steel Beams

Ungureanu, Viorel; Both, Ioan; Burcă, Mircea; Benzar, Ştefan; Nguyen, Thai Hoang; Neagu, Călin; Dubină, Dan

doi:10.4028/www.scientific.net/amr.1146.142

Cited by 6 publications

(7 citation statements)

References 15 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, on spot welded specimens tested experimentally [6], a good capacity and ductility was observed, but in comparison with self-drilling screws the ductility was smaller.…”

Section: Introductionmentioning

confidence: 98%

“…Sometimes profiles with larger sections and a sheet thickness of 3-5 mm are required in cases of bordering the gaps for windows or doors. Different research programs have been carried out regarding the overall behavior of cold-formed steel profile beams or their connections [6][7][8][9]. The floor system for roofs can also be made of truss beams spaced, for example, at 60 cm apart.…”

Section: Introductionmentioning

confidence: 99%

“…The fully equipped manufacturing facility can produce a large number of geometrical configurations for trusses as load bearing subsystems for roofs, floors (Figure 2) or wall panels (Figure 1). Unlike previously proposed solutions [6,[23][24][25][26], in the case of these new systems, the structural concept is based on the truss beams and panels for walls. The joints are based on self-drilling and self-tapping screws with holes prepared in advance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation and Numerical Simulation of C-Shape Thin-Walled Steel Profile Joints

Taranu

Toma

2021

Buildings

View full text Add to dashboard Cite

The versatility of steel, its high resistance in relation to its low mass, as well as the easily accessible technology in the context of using recyclable materials and the low negative impact on the environment represent important arguments in using thin-walled steel profiles to make structures for buildings with a low height regime. This paper presents the results of an experimental program that investigated the behavior of three types of joints in a T-shape form made of thin-walled steel profiles to make shear wall panels or truss beam floors. Due to the small dimensions of the C-profiles of 89 × 41 × 12 × 1 mm, and of the technology of their joining, manufacturers prefer the hinged connections of elements with self-drilling screws. The purpose of the research presented in this paper is to assess the maximum capacity of the joints, the elastic and post-elastic behavior until failure, and also the mechanisms failure. The types of joints analyzed are commonly used in the production of structural systems for houses. The experimental program, which consisted of testing 5 specimens for each type of joint in tension (shear on screws), showed different behavior in terms of load-displacement. The experimental, tested models were analyzed by finite element simulations in an ANSYS nonlinear static structure with 3D solid models. The materials were defined by a bilinear true stress–strain curve obtained after some experimental tensile tests of the steel. The results of the experimental tests showed that the main failure mechanism is a yielding of the holes where the screws were mounted and a shearing of the profile walls. Adding an additional screw on each side increases the capacity of the joints, but not until a yield loss is obtained. In conclusion, it is shown that the solution is suitable for a low level of loading in a static manner; however, additional studies are necessary in order to develop and verify other solutions, thus improving the strength of the connection.

show abstract

“…For example, on spot welded specimens tested experimentally [6], a good capacity and ductility was observed, but in comparison with self-drilling screws the ductility was smaller.…”

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation and Numerical Simulation of C-Shape Thin-Walled Steel Profile Joints

Taranu

Toma

2021

Buildings

View full text Add to dashboard Cite

show abstract

“…Cold-formed steel (CFS) profile structures may represent a solution for this new challenge of achieving a sustainable design process. There are already over 100 years of experience in using CFS [1], but intensive research has been carried out only in the last 50 years [2][3][4][5], while in the last 30 years it has begun to increase even more [6][7][8]. Some of that research focused on profile section or structural systems and others on the connection types between profiles under different type of loadings.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Design for CFS Structures: Experimental Data and Numerical Models of Hinged Connections

et al. 2022

View full text Add to dashboard Cite

Cold-formed steel structures represent a suitable alternative to classical, by now, structural solutions considering the recycling/reuse tendency worldwide as part of the circular economy paradigm. The paper presents a new design approach for CFS profile joints to accurately predict their realistic behavior, based on experimental and numerical investigation of two types of connectors frequently used in the construction industry for manufacturing joints made of CFS profiles: steel-steel pop-rivets (SSPR) and self-tapping screws (STS). The experiments carried out in the case of T-joints subjected to tensile forces tested both solutions. Another significant parameter of the research was the thickness of the steel sheet used to make the CFS profiles. A number of 20 specimens of T-joints made of Cold-Formed Steel (CFS) profiles in total were tested. These consist of five specimens for each of two types of steel sheet thicknesses. The results are relevant for designers because they provide relevant data concerning the limited axial rigidity of T-joints, which are an important instrument in numerical models for achieving the optimum design of the structural system in terms of strength and overall rigidity. Experimental tests calibrate the numerical model that accounts for the axial stiffness of the hinged joints between the CFS profiles. The main parameters of the research are the thickness of the steel sheet and the connector type. The calibrated numerical model used in a case study highlights the advantages of the new approach compared to the classical design procedure based on a conventional hinged connection. Based on the results, the conclusion is that, besides the geometry of the joint and the connector type, the joint stiffness plays a crucial role in the overall behavior of the structural system and should be accounted for in the design process.

show abstract

“…To avoid local buckling of the corrugations, MIG brazing connects the flange and the web on an increased length and distributes the local stress which appear in the case of discrete fasteners, leading to an increased rigidity and capacity of such beams [9] .…”

mentioning

confidence: 99%

The Effect of Connections on The Global Response of Built-up Cold-formed Steel Beams with Corrugated Webs

Both

Bodea

Ungureanu

2022

Jounarl of Building Design and Environment

Self Cite

View full text Add to dashboard Cite

The objective of this paper is to quantify the slippage and rotation in the connections of a double xed corrugated web beam. Two types of connections between the component parts of the built-up beam were used, i.e. MIG brazing and spot welding, which offer different rigidities and bearing capacities for the built-up beams. Experimental tests were conducted on three MIG brazed and two spot welded specimens, respectively. The test setup consisted of a six-point bending con guration which is equivalent to a uniform distributed load applied to the beam. The load was applied from a 500kN actuator through a leverage system that allowed the distribution of the force. An out-of-plane structure prevented the beam from lateral torsional buckling. The testing exhibited relatively large slippage and deformation in the bolted connections and in the supporting device, respectively. However, the high rigidity of the beam maintained the mid-span deflection in the serviceability limit state limits. The built-up corrugated web beams made of cold-formed steel pro les represent an ef cient and suitable structural solution for buildings. Nevertheless, experimental research due to inevitable slippage and the endplate deformation must be performed to characterize the connection.

show abstract

Experimental Investigations on Spot Welded Built-Up Cold-Formed Steel Beams

Cited by 6 publications

References 15 publications

Experimental Investigation and Numerical Simulation of C-Shape Thin-Walled Steel Profile Joints

Experimental Investigation and Numerical Simulation of C-Shape Thin-Walled Steel Profile Joints

Sustainable Design for CFS Structures: Experimental Data and Numerical Models of Hinged Connections

The Effect of Connections on The Global Response of Built-up Cold-formed Steel Beams with Corrugated Webs

Contact Info

Product

Resources

About