Influence of Flexibility of Bolted Joints on Rigity of the Hingeless Frame

Romaniuk, Volodymyr; Suprunіuk, Volodymyr

doi:10.1007/978-3-030-57340-9_45

Cited by 4 publications

(3 citation statements)

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“…In fact, under the action of external load beams are bent and as a result of their deflection bolts are stretched and interfere with free deformations on the supports, that is these supports become partially rigid, which affects to the redistribution of forces along the length of the beam, and, for example, rigid flange bolted connections, in turn, on the contrary, work as partially hinged. Theoretical and experimental studies [3][4][5][6][7][8][9][10][11] performed earlier, including by the authors of this work, confirm this.…”

supporting

confidence: 75%

“…In particular, the authors as a result of tests of a steel perforated arch with a rigid flange ridge node [3,4,5] found a significant difference in stresses calculated theoretically and obtained experimentally, in cross sections near it (the difference was 56.6% … 67.1 %. ), and the pliability of the hinged single-span frame with rigid nodes [11] was 6% ... 10%.…”

mentioning

confidence: 99%

“…Summary. The data obtained as a result of theoretical and experimental studies [3,4,5,11] showed that in determining the diameters of bolts in which the values of tensile stresses are close to their calculated resistance y R and which are located at the minimum distance from the edge of support according to requirements [1], the effect of additional bending moment on the support is almost absent. However, if you increase the diameter of the bolts, and, accordingly, their cross-sectional area, it is possible to reduce the tensile stresses in them to 0,5 y R and, removing the bolts from the edge of the support, thus limiting the free rotation of the support nodes, to achieve rigidity of the node 0,035...0,096 k  , which has a significant impact on the work of both the nodes themselves and the elements connected in it.…”

mentioning

confidence: 99%

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The Effect Of The Actual Stiffness Of Bolted Hinged Joints On The Bearing Capacity Of The Elements

Romaniuk¹,

Супрунюк²,

Bezniuk³

et al. 2021

OMTC

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The article investigates the influence of partial stiffness of the hinge joint of single-span and multi-span freely supported beams with lower structures on their stress-strain state under the action of vertical evenly distributed load. Joints of freely supported beams under the action of external load are opened on supports and mounting bolts interfere with their full opening, that is joints work as partially rigid. Knowing some initial parameters of ideally hinged joints, it is possible to establish what influence their change will have both on the calculation scheme of beams, and on calculation schemes of cross frames of frameworks of buildings and constructions, to which they enter, as a whole. The method of initial parameters was used to determine the influence of the resistance of the mounting bolts on the opening of the support joints on the stress state of the elements. The offered technique allows to define real rigidity of any bolted hinge connection taking into account its actual work and to adjust it stiffness by changing the diameter of the bolts, the strength of the material from which they are made, their number, distance between them, as well as use additional material resource by reducing the maximum stresses in the calculated cross sections. This is especially true of elements made of perforated profiles, because the change of stress-strain state in the support zones will cause redistribution of stresses in the calculated points of their cross sections, both on the supports and in the span of the beams. This must be taken into account by including certain coefficients in the calculation formulas, depending on the specific operating conditions.

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supporting

confidence: 75%

mentioning

confidence: 99%

mentioning

confidence: 99%

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