Numerical study and practical design of beam-to-column connections with shape memory alloys

Yam, Michael C.H.; Fang, Cheng; Lam, Chi Chiu; Zhang, Yanyang

doi:10.1016/j.jcsr.2014.10.017

Cited by 117 publications

(64 citation statements)

References 14 publications

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“…For structural engineering applications, e.g. washers for selfcentring connections [17] or dampers, a preload (i.e. pre-compression) can be applied, and in this case, pre-training may be unnecessary from a self-centring point of view.…”

Section: Self-centring Abilitymentioning

confidence: 99%

“…Larger diameter SMA bars can be another alternative to SMA wires in order to achieve a reasonable level of load resistance for structures. The ends of the SMA bars are often threaded such that they can be used as bolts for connections [14][15][16][17] and bridge restraining devices [18]. However, relevant test programmes [15][16] showed that SMA bolts were quite susceptible to fracture over the threaded area.…”

Section: Introductionmentioning

confidence: 99%

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Superelastic SMA Belleville washers for seismic resisting applications: experimental study and modelling strategy

Fang

Zhou

Osofero

et al. 2016

Smart Mater. Struct.

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This study sheds considerable light on the potential of superelastic Shape Memory Alloy (SMA) Belleville washers for innovative seismic resisting applications. A series of experimental studies were conducted on washers with different stack combinations under varying temperatures and loading scenarios. The washers showed satisfactory self-centring and energy dissipation capacities at room temperature, although slight degradations of the hysteretic responses accompanied by residual deformations were induced. The hysteretic loops became stable after a few number of cycles, indicating good repeatability. The washers also showed good flexibility in terms of load resistance and deformation, which could be easily varied via changes in the stack combination. Compromised selfcentring responses were observed at temperatures below 0 °C or above 40 °C, and a numerical study, validated by the experimental results, was adopted to further investigate the deformation mechanism of the washers. A further phenomenological model, taking account of the degradation effects under varied temperatures, was developed to enable effective and accurate simulation of devices incorporating the washers. Good agreements were observed between the test and simulation results, and the model was shown to have good numerical robustness for wide engineering applications.

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Section: Self-centring Abilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superelastic SMA Belleville washers for seismic resisting applications: experimental study and modelling strategy

Fang

Zhou

Osofero

et al. 2016

Smart Mater. Struct.

Self Cite

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“…3. [30] in end-plate connections, Wang et al [31] in connections to CHS columns or Hu et al [32] in partial restraint connections to CFST columns.…”

Section: Introductionmentioning

confidence: 99%

Advanced materials for concrete-filled tubular columns and connections

et al. 2015

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The advantages of concrete-filled steel tubular (CFST) columns are well known at room and elevated temperatures, however, beyond a certain slenderness their load-bearing capacity starts to decrease. Besides, blind-bolts represent a proper system to allow endplate bolted connections to hollow steel tubular columns and CFST, although the resistance of the bolt shank conditions affects the performance of the connection. In this paper, the use of innovative materials is proposed as a method of enhancing of the load-bearing capacity for both CFST columns and connections. In this line, a first approach of the benefits using high strength steel, fire-resistant steel and geopolymer concrete applied for CFST columns in the fire situation is developed, obtaining better fire results although depending on the columns cross-sections configuration and the part where the advanced material is applied. Related to blind-bolts connections under fire conditions, the use of fire-resistant bolts is assessed. Their higher strength retention in fire could avoid the use of protection, but only in limited cases. Furthermore, a preliminary study on shape memory alloys in the blind-bolts is performed at room temperature and supporting cyclic pull-out loading.

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“…The connections consist of plates especially designed to yield under loading and dissipate the seismic energy. Some examples include: the PI damper connection (Koetaka et al, 2005), the slit damper connection (Chan and Albermani, 2008;Oh et al, 2009;Saffari et al, 2013), double split tee (DST) connections (Herrera et al, 2013;Bravo and Herrera, 2014;Latour and Rizzano, 2015;Tong et al, 2016), dissipative splice connections (Calado et al, 2013;Valente et al, 2017a,b), or connections with memory shape alloy bolts (Wang et al, 2015;Yam et al, 2015).…”

Section: Past Studies Regarding Classic Beam-to-column Connectionsmentioning

confidence: 99%

Beam-to-Column Connections with Demountable Energy Dissipative Plates

Venghiac

Stașcov

Budescu

2018

Front. Built Environ.

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The behavior of steel structures subjected to seismic actions depends directly on the connections behavior. There are two current tendencies for ensuring the structural ductility: allowing the formation of plastic hinges in the beams by using reduced beam sections or reduced web sections or by ensuring the plastic hinge formation in the connection by using dissipative elements. This paper presents a new perspective regarding the energy dissipation mechanism formation within the beam-to-column connection. The design of connections capable of dissipating large amounts of energy, with an acceptable strength and ductile behavior is a real challenge for engineers. Sustainability is a big advantage for these connections. Another big advantage is the possibility of restoring the functionality of the damaged construction in a short time interval and with reduced costs. The introduction of connections with demountable energy dissipative plates can be a step forward in designing new beam-to-column connections for steel structures.

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Numerical study and practical design of beam-to-column connections with shape memory alloys

Cited by 117 publications

References 14 publications

Superelastic SMA Belleville washers for seismic resisting applications: experimental study and modelling strategy

Superelastic SMA Belleville washers for seismic resisting applications: experimental study and modelling strategy

Advanced materials for concrete-filled tubular columns and connections

Beam-to-Column Connections with Demountable Energy Dissipative Plates

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