Novel joint for improving the collapse resistance of steel frame structures in column-loss scenarios

Tian, Li-min; Li, Muhan; Li, Lei; Li, Dongye; Bai, Chong

doi:10.1016/j.tws.2022.110219

Cited by 77 publications

(15 citation statements)

References 20 publications

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Section: Feamentioning

confidence: 99%

“…According to the experimental data, the Auricchio multi-linear simplified model in ABAQUS [22,23] was used to simulate the low-cycle fatigue performance of SMA bar with the heat treatment parameters of being held at 350 • C for 30 min, and the comparison of the stress-strain curve and nephogram between the finite element and experiments are shown in Figures 12 and 13. The comparative analysis of the mechanical parameters in Table 4 shows that the error of the stress peak between the experimental results and the simulated analysis is within 5%, which means that the finite element simulation results are in better agreement with the experimental results.…”

Section: Feamentioning

confidence: 99%

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Research on Fatigue Performance of Shape-Memory Alloy Bars under Low Cyclic Loading

Li,

Zhao,

Cheng

2023

Buildings

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In recent years, shape memory alloys (SMAs) have been applied in the vibration control of engineering structures due to their special properties such as super elasticity and high damping, and the study of the performance of SMA wires has been relatively comprehensive, while research on the fatigue performance of SMA bars via cyclic tensile tests has been pretty rare, and low-cycle fatigue test has not been reported. However, the damage to building structures caused by earthquakes is of high-strain, low-cycle fatigue; therefore, in order for SMA bars to be used in seismic design, low-cycle fatigue tests were conducted on SMA bars with a diameter of 14 mm in this paper. Firstly, specimens were heat treated at a constant temperature of 350 °C for 30 min; other specimens were heat treated at a constant temperature of 400 °C for 15 min, while the rests were heat treated under a constant temperature of 400 °C for 30 min. Secondly, the energy dissipation capacity and residual strain of the SMA bar specimens were determined using the low-cycle fatigue test, in which the strain amplitudes were 2.5%, 3.5% and 3.75%. Additionally, the stress–strain relationship for SMA bars under cyclic loading was given. Finally, low-cycle fatigue properties of SMA bars were numerically simulated in the comparison analysis with the experimental results to verify their feasibility. Thus, it is proved that SMA bars can be recommend for seismic design building structures.

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Section: Feamentioning

confidence: 99%

Section: Feamentioning

confidence: 99%

Research on Fatigue Performance of Shape-Memory Alloy Bars under Low Cyclic Loading

Li,

Zhao,

Cheng

2023

Buildings

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“…Under compression or impact, metallic structures buckle and/or fold with significant plastic deformation. [13][14][15] When a composite fail, a series of damage mechanisms, including fiber breakage, matrix cracking, fiber-matrix debonding, and de-lamination, take place due to its brittleness. The microstructure design of composite structures, which includes the constituent materials (fiber and matrix), geometrical dimensions, section shape, filling with foam or honeycomb, and crush speed, determines the order in which damage mechanisms occur.…”

Section: Introductionmentioning

confidence: 99%

Energy absorption capability of laterally loaded glass/epoxy tubular components containing halloysite nanotubes

Awd Allah,

Abd El-baky,

Alshahrani

et al. 2023

Journal of Composite Materials

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The crashworthiness capability of laterally loaded glass/epoxy (GFRE) tubular components containing halloysite nanotubes (HNTs) was explored in this article. GFRE components filled with 0, 1, 2, 3, and 4 weight percent (wt.%) of HNTs were created using wet-wrapping by hand lay-up technique. For the laterally loaded tubes, the crushing load and the energy absorption versus displacement responses were presented. In addition, distortion histories were tracked. The crashworthiness analysis was carried out by evaluating different indicators, i.e., initial crush load [Formula: see text], average crush load ([Formula: see text]), crush load efficiency (CFE), energy absorption (U), and specific absorbed energy (SEA). Two parameters of the Weibull distribution were employed to assess the experimental findings statistically. In addition, mathematical regression models were built to predict the energy absorption indicators. Experimental results demonstrated that an unfilled tube demonstrated the largest CFE of 1.84, while the maximum [Formula: see text] was demonstrated by a tube filled with 2 wt.% of HNTs with a value of 3.70 kN. Additionally, the tube filled with 4 wt.% of HNTs represents the extremes [Formula: see text], U, and SEA with values of 4.26 kN, 128.82 J, and 3.84 J/g, respectively. Due to their improved crashworthiness characteristics, GFRE filled with 4 wt.% of HNTs is suitable for use as a crashworthy device in automobiles.

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“…Each of these mechanisms prevents the transfer of destructive kinetic energy to the body of the devices in which the absorber is used by absorbing the energy caused by the force on the absorber. The materials used in thin-walled structures include a wide range and can be classified into metal [7][8][9] and polymer materials. Regarding metal materials, ferrous metals aluminum and copper alloys can be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Investigating energy absorption of thin-walled steel structures with combined mechanisms including inversion, folding and expansion

Waleed¹,

Ruhaima

Farhan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this research, thin-walled steel energy absorbers were investigated. The introduced structures absorb energy through the processes of inversion, folding and expansion. Each absorber consists of two end-capped frusta and a cylindrical shell. The intended absorbers were experimentally made and then tested. The mechanical properties of the used materials were extracted by performing tensile tests and then used for simulation. The simulations of this research were carried out using LS-DYNA software. After comparing the experimental and numerical results, a good agreement between the results was observed and then the obtained results were discussed. The intended absorbers were examined in terms of the thickness of the lower frustum, the height of the middle shell and the angle of the upper frustum. The obtained results showed that by increasing the thickness of the lower frustum, energy absorption in the inversion process increased. In addition, the investigations related to the effect of height on the collapse properties showed that increasing the height of the middle shell with a thickness of 2 mm for the lower frustum led to a decrease in energy absorption. Also, in the investigations carried out on the half angle of the frustum, it was found that the contribution of energy absorption in the expansion process was low.

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Novel joint for improving the collapse resistance of steel frame structures in column-loss scenarios

Cited by 77 publications

References 20 publications

Research on Fatigue Performance of Shape-Memory Alloy Bars under Low Cyclic Loading

Research on Fatigue Performance of Shape-Memory Alloy Bars under Low Cyclic Loading

Energy absorption capability of laterally loaded glass/epoxy tubular components containing halloysite nanotubes

Investigating energy absorption of thin-walled steel structures with combined mechanisms including inversion, folding and expansion

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