Experiments on elastically braced castellated beams

Showkati, Hossein; Ghazijahani, Tohid Ghanbari; Noori, Amir; Zirakian, Tadeh

doi:10.1016/j.jcsr.2012.05.008

Cited by 33 publications

(13 citation statements)

References 10 publications

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“…Tsavdaridis and D'Mello [26] investigated buckling behaviour of the web in CBs with innovative shapes of opening. Showkati et al [27] have tested simply supported CBs subjected to pure bending. Durif et al [28] investigated behaviour of CBs with sinusoidal openings and compared with circular openings.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Deflections in Cantilever and Fixed Castellated Beams with Hexagonal, Square and Circular Openings

Sayyad¹,

Shaikh²

2020

IJES

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Section: Introductionmentioning

confidence: 99%

Estimation of Deflections in Cantilever and Fixed Castellated Beams with Hexagonal, Square and Circular Openings

Sayyad¹,

Shaikh²

2020

IJES

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“…This not only concentrated the plastic deformation in the replaceable link during the large earthquake and reduced the cost of the overall structure, but also made the maintenance even easier after the earthquake. Previous investigations [38] have shown that elastic bracing can solve the problem of the lateral bracing of structural members and further research should discuss its applicability to EBFs.…”

Section: Introductionmentioning

confidence: 99%

Damage Analyses of Replaceable Links in Eccentrically Braced Frame (EBF) Subject to Cyclic Loading

2019

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In the current design of steel eccentrically braced frames (EBFs), the yielding link is coupled with the floor beam. This causes the design of cross-sectional dimensions of links to be enlarged, resulting in over-designed structures and foundations, and increasing the cost of the overall structure. In addition, the beams are forecast to sustain severe damage through repeated inelastic deformations under design-level earthquakes, and thus the structure may require extensive repair or need to be replaced. To improve upon these drawbacks, a shear device with replaceable links based on EBFs was designed. The hysteresis curve, the stress distribution, and the deformation of the specimen were obtained by cyclic loading tests of the eight replaceable links. The energy dissipation behavior, the bearing capacity, the failure modes, and the plastic rotation angle of those specimens were analyzed. The results indicated clearly that the links in this shear device had inelastic deformation concentrated in the link showing very stable hysteresis behavior, and damaged links were replaced easily as end-plate connections were adopted. The energy dissipation capacity and the plastic rotation angle of the specimens were mainly dependent on the arrangement of stiffener, length ratio, and welding access holes. Experimental studies performed in this research and the related damage analyses reveal that cracks are the major causes of damage to the EBF and there is a lack of research on real-time monitoring of the onset and development of these cracks in EBF structures. As a future work, this paper proposes a piezoceramic patch transducer-based active sensing approach to monitor the crack onset and development of the EBF when subjected to dynamic loadings.

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“…A number of experimental, theoretical and numerical investigations have showed the factors having an impact on castellated beam's vulnerability to lateral torsion buckling, which include the distance between the lateral restrictions to the compression stresses of the flanges; properties of the material; boundary conditions; type of cross section; type and position of the loading; quantity and distribution of the residual stresses and geometric imperfections. Previous studies investigated the lateral-torsional buckling (Kerdal and Nethercot ,1982;Mohebkhah,2004;Korrani et al, 2010;Sonck et al, 2014;Kim et al, 2016 ;Kwani and Wijaya,2017) and lateral buckling (Müller et al, 2006 ;Showkati et al,2012) of castellated beams under transverse loads.…”

Section: Introductionmentioning

confidence: 99%

Dynamic instability of castellated beams subjected to transverse periodic loading

Elaiwi¹,

Kim²,

Li³

2019

CJSMEC

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In this study, an analytical solution is developed for the investigation of free vibration, static buckling and dynamic instability of castellated beams subjected to transverse periodic loading. Bolotin’s method is used to perform the dynamic instability analysis. By assuming the instability modes, the mass, stiffness, and geometric stiffness matrices are derived using the kinetic energy, strain energy and potential of applied loads. Analytical equations for determining the free vibration frequency, critical buckling moment, and excitation frequency of castellated beams are derived. In addition, the influences of the flange width of the castellated beam and the static part of the applied load on the variation of dynamic instability zones are discussed.

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Experiments on elastically braced castellated beams

Cited by 33 publications

References 10 publications

Estimation of Deflections in Cantilever and Fixed Castellated Beams with Hexagonal, Square and Circular Openings

Estimation of Deflections in Cantilever and Fixed Castellated Beams with Hexagonal, Square and Circular Openings

Damage Analyses of Replaceable Links in Eccentrically Braced Frame (EBF) Subject to Cyclic Loading

Dynamic instability of castellated beams subjected to transverse periodic loading

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