Experimental study of steel plate shear walls with infill plates strengthened by GFRP laminates

Nateghi-Alahi, Fariborz; Khazaei-Poul, Masoud

doi:10.1016/j.jcsr.2012.07.002

Cited by 33 publications

(8 citation statements)

References 25 publications

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“…Similar conclusions were made by Nateghi-Alahi and Khazaei-Pul [16] when testing hybrid steel/GFRP specimens under fully reversed cyclic quasi-static loading. Hybrid specimens achieve higher ultimate strength and increase the cumulative energy dissipation.…”

Section: Hybrid Steel/frp Shear Wallssupporting

confidence: 86%

Comparison of the behaviour of steel, pure FRP and hybrid shear walls under cyclic seismic loading in aspect of stiffness degradation and energy absorption

Petkune¹,

Donchev

Hadavinia

et al. 2018

Construction and Building Materials

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Introducing of lightweight lateral load resisting systems, such as steel shear walls (SSW) is very beneficial for multi-storey buildings. Further improvement of such elements via introducing fibre reinforced polymer (FRP) materials is expected to allow increasing of their ultimate load capacity, stiffness and energy absorption. The aim of presented research is to compare the behaviour of modified SSW via inclusion of FRP in infill plate design. Produced and tested samples are three different types: with steel infill plate (control), with FRP infillplate and with hybrid steel/FRP infill plate. All samples are loaded under quasi-static cyclic seismic testing load as defined in ATC 24 protocol (ATC 24, 1992). The highest ultimate load capacity and lowest stiffness degradation is achieved for sample with glass FRP infill plate, followed by hybrid (carbon FRP/steel and glass FRP/steel) samples. Highest cumulative energy absorption for predominant part of the investigated amplitudes was achieved forhybrid samples. The obtained results indicate that the innovative shear walls with FRP and hybrid infill plates offer excellent load capacity and energy absorption, relatively small loss of stiffness and potential for increased durability in comparison with conventional SSW systems.

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Section: Hybrid Steel/frp Shear Wallssupporting

confidence: 86%

Comparison of the behaviour of steel, pure FRP and hybrid shear walls under cyclic seismic loading in aspect of stiffness degradation and energy absorption

Petkune¹,

Donchev

Hadavinia

et al. 2018

Construction and Building Materials

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“…The sandwich structure laminates reinforced by fibers including glass, carbon and boron fiber are widely used in the aeronautic, military and automobile application fields due to their high mechanical intensity, light weight, corrosion resistance, and easy processability [1–3]. Notably, the fiber plays one of the important roles in guaranteeing the excellent performance of sandwich laminates [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the tensile performance and failure mechanism of carbon–aramid hybrid fibers/epoxy sandwich structure laminates using the UV-thermal synergetic curing mechanism: Experimentation and simulation

Liu

2018

Jnl of Sandwich Structures & Materials

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The tensile failure mechanism of carbon–aramid hybrid fibers/epoxy sandwich structure laminates was investigated by using experimental and finite element methods. Double curing agents, triarylsulfonium hexafluoroantimonates and triethylene tetramine with a mass ratio of 4:15 were introduced into the laminates. Sandwich structure laminates, with different proportions of hybrid fibers, were cured by UV-initiated anion/cationic dual curing technique. The results showed that the synergetic curing effects of two curing agents were observed under UV irradiation, leading to the better curing of the system, which further plays a positive influence on the mechanical performance. The tensile properties and failure mechanism of the laminates depended on the stacking sequence and fiber volume fractions of the layer structures. The interplay hybrid laminates, containing three alternate plies with fiber contents of 67.7 vol%, presented the optimal tensile performance, and its tensile strength and modulus were 0.82 GPa and 22.09 GPa, respectively. The fracture morphologies revealed that pull-out and debonding of fibers were the main failure mechanism of hybrid laminates. The performance of sandwich structure laminates was determined by the load-carrying capacity of carbon fiber and load-transferring capacity of the aramid fiber and adhesive. The finite element model based on experiments was established to simulate the stress state and failure mechanism of sandwich laminates. The results demonstrated that the stress was better transferred into carbon fibers from the aramid fibers and adhesive, and the relative error rate of maximum stress from finite element analysis and experimental results was less than 5%, which were in reasonable agreement with the experimental results.

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“…Therefore, highway bridges with irregular geometry and nonuniform mass and stiffness distribution, such as horizontally curved bridges (Amjadian and Agrawal, 2016) or skew bridges (Kalantari and Amjadian, 2010, 2011; Amjadian and Kalantari, 2012; Amjadian et al., 2016), have complicated dynamic characteristics compared to highway bridges with regular and symmetric geometry, such as straight bridges. There is no doubt that finite-element method (FEM) is the most reliable approach to dynamic analysis of structures, buildings (Nateghi-Alahi and Khazaei-Poul, 2012; Lu et al., 2015) and bridges (Tondini and Stojadinovic, 2012; Mondal and Prakash, 2016), with different types of materials and levels of computational complexity. However, determination of exact dynamic characteristics of a bridge using FEM can be expensive and time-consuming, particularly in the preliminary stage of the design.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of horizontally curved bridges

Amjadian

Agrawal

2017

Journal of Vibration and Control

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Horizontally curved bridges have complicated dynamic characteristics because of their irregular geometry and nonuniform mass and stiffness distributions. This paper aims to develop a simplified and practical method for the calculation of the natural frequencies and mode shapes of horizontally curved bridges that would be of interest to bridge engineers for the estimation of the seismic response of these types of bridges. For this purpose, a simple three-degree-of-freedom (3DOF) dynamic model for free vibration equation of this type of bridge has been developed. It is shown that the translational motion of the deck of horizontally curved bridges in the direction that is perpendicular to their axis of symmetry is always coupled with the rotational motion of the deck, regardless of the location of the stiffness center. The model is further exploited to develop closed-form formulas for the estimation of the maximum displacements of the corners of the deck of one-way asymmetric horizontally curved bridges. The accuracy of the model is verified by finite-element model of a horizontally curved bridge prototype in OpenSEES. Finally, the model is utilized to study the influence of the location of the stiffness center with respect to the deck curvature center on the natural frequency and the maximum displacements of the corners of the deck for different curvatures of the deck. The results of free vibration analysis show that the natural frequencies of one-way asymmetric horizontally curved bridges, in general, increase with the increase of the subtended angle of the deck. The results of earthquake response spectrum analysis show that the increase in the subtended angle of one-way asymmetric horizontally curved bridges decreases the radial displacements of the corners of the deck but increases the azimuthal displacement. These two responses both increase with the increase in the distance between the stiffness center and the curvature center.

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Experimental study of steel plate shear walls with infill plates strengthened by GFRP laminates

Cited by 33 publications

References 25 publications

Comparison of the behaviour of steel, pure FRP and hybrid shear walls under cyclic seismic loading in aspect of stiffness degradation and energy absorption

Comparison of the behaviour of steel, pure FRP and hybrid shear walls under cyclic seismic loading in aspect of stiffness degradation and energy absorption

Investigation of the tensile performance and failure mechanism of carbon–aramid hybrid fibers/epoxy sandwich structure laminates using the UV-thermal synergetic curing mechanism: Experimentation and simulation

Dynamic characteristics of horizontally curved bridges

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