Castings in tubular structures – the state of the art

Herion, Stefan; Oliveira, José Carlos de; Packer, Jeffrey A.; Christopoulos, Constantin; Gray, Michael G.

doi:10.1680/stbu.2010.163.6.403

Cited by 25 publications

(8 citation statements)

References 14 publications

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“…This has led to the development of 'pre-engineered' proprietary solutions using 'off-the-shelf' cast steel connections (Herion et al 2010). A substantially more compact field-bolted connection is achieved than would otherwise be possible with typical bolted connections using splice plates.…”

Section: Bracing Connectionsmentioning

confidence: 99%

Seismic Code Developments for Steel and Composite Structures

Elghazouli

2015

Perspectives on European Earthquake Engineering and Seismology

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As with other codified guidance, seismic design requirements undergo a process of continuous evolution and development. This process is usually guided by improved understanding of structural behaviour based on new research findings, coupled with the need to address issues identified from the practical application of code procedures in real engineering projects. Developments in design guidance however need to balance detailed technical advancements with the desire to maintain a level of practical stability and simplicity in codified rules. As a result, design procedures inevitably incorporate various simplifications and idealisations which can in some cases have adverse implications on the expected seismic performance and hence on the rationale and reliability of the design approaches. With a view to identifying the needs for future seismic code developments, this paper focuses on assessing the underlying approaches and main procedures adopted in the seismic design of steel and composite framed structures, with emphasis on the current European seismic design code, Eurocode 8. Codified requirements in terms of force reduction factors, ductility considerations, capacity design verifications, and connection design procedures, are examined. Various requirements that differ notably from other international seismic codes, particularly those incorporated in North American provisions, are also pointed out. The paper highlights various issues related to the seismic design of steel and composite frames that can result in uneconomical or impractical solutions, and outlines several specific seismic code development needs.

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Section: Bracing Connectionsmentioning

confidence: 99%

Seismic Code Developments for Steel and Composite Structures

Elghazouli

2015

Perspectives on European Earthquake Engineering and Seismology

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“…Especially, there has been no significant progress for many years in the manufacturing process of steel bifurcation joints. The traditional casting process of steel joints leads to a lower geometrical precision, longer manufacturing periods, high energy consumption and less architectural freedom [3][4][5]. Moreover, cast steel joints have to be mass produced in order to be affordable and hence many numbers of different joints are casted at once to cut the costs limiting the architectural freedom.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing and Mechanical Performance of Trifurcated Steel Joints for Architecturally Exposed Steel Structures

Wang

et al. 2020

Materials

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Additive Manufacturing (AM) technology has unique advantages in producing complex joints in architecturally exposed steel structures. This article focuses on the process of manufacturing and investigating the mechanical properties of a reduced scale model of a trifurcated joint using Selective Laser Melting (SLM) method and mechanical tests, respectively. The orthogonal test method was used to optimize the main AM process parameters. Then the trifurcated steel joint was printed using the optimal process parameters and treated by solid solution and aging treatment. To investigate the mechanical performance of the printed joint, an axial compression test and complimentary finite element analyses were carried out. Failure processes and failure mechanisms of the trifurcated steel joint were discussed in detail. The research results show that the preferred process parameters for printing 316L stainless steel powder are: scanning power 150 W, scanning speed 700 mm/s, and scanning pitch 0.09 mm. Using these AM parameters, trifurcated steel joints with good surface quality, geometrical accuracy and tensile strength are obtained after heat treatment. Our mechanical tests and Finite element analyses results indicate that the failure mechanism in the AM trifurcated joint are similar to those of cast steel joints. Based on these results, we conclude that the AM technology serves as a promising new way for the fabrication of joints with complex geometries.

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“…Since traditional T-stubs are usually made from two welded plates or profiled tees, it would be very difficult and uneconomical to change the shape of T-stub flange by machining. Another practical approach called ''steel casting'' offers a feasible solution for this issue (Herion et al, 2010). Steel casting is a process that could produce monolithic and weld-free steel components of complex configurations.…”

Section: Introductionmentioning

confidence: 99%

“…Steel casting is a process that could produce monolithic and weld-free steel components of complex configurations. The cast steel components have been widely used in structural engineering over the last few decades due to the flexibility of their geometry Tong, 2008, 2010;Herion et al, 2010). The main application of cast steel is for structural components with complex shapes, and those components are normally designed to remain elastic during the service period.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on cyclic behavior of cast steel connectors for beam-to-column joints

Chen

Tong

Chen

et al. 2016

Advances in Structural Engineering

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This article presents an experimental study on two innovative types of cast steel connectors, which would be used as a replaceable energy-dissipating component in the beam-to-column joint. The main aim was to use the connectors as the main source of deformation and energy dissipation, and to realize rapid repair of the joints by simple replacement of these connectors after earthquakes. A total of eight cyclic tests under two loading procedures were conducted on three types of connectors, namely, traditional welded T-stubs W, C1 type cast steel connectors, and C2 type cast steel connectors. The new cast steel connector specimens were observed to have good energy dissipation capacity with stable and plump hysteretic curves, and the equivalent viscous damping could achieve up to 43.7%. The ductility, which was governed by fracture of energy-dissipating elements, was shown to be satisfactory. The L/ t ratio (the length of energy-dissipating element to its thickness ratio) was found to be an important factor influencing the cyclic performances of C2 connectors. The accumulated plastic damage of C2 connector caused by bidirectional reversed tension and compression actions did not significantly weaken its energy dissipation capacity, which demonstrated the feasibility of employing C2 connector only in the beam bottom flange of a beam-to-column joint.

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Castings in tubular structures – the state of the art

Cited by 25 publications

References 14 publications

Seismic Code Developments for Steel and Composite Structures

Seismic Code Developments for Steel and Composite Structures

Additive Manufacturing and Mechanical Performance of Trifurcated Steel Joints for Architecturally Exposed Steel Structures

Experimental study on cyclic behavior of cast steel connectors for beam-to-column joints

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