<abstract xmlns="http://www.w3.org/1999/xhtml">The paper presents a way of taking account of the effect of changing loads on the deflection of RC beams reinforced with ribbed bars. The proposed solutions were verified experimentally, based on the results of tests performed by the author. The beams were subjected to multiple repeatable loads. The deflection increment dependent on the value of the basic parameters characterising the changing loads (cycle maximum load <italic>M</italic>max, stress ratio <italic>R</italic>, number of load cycles <italic>N</italic>i). The increment of the deflection of RC beams reinforced with ribbed bars subjected to changing loads increases with increases in the number of load cycles <italic>N</italic>i (log<italic>N</italic>i, to be more accurate), and is greater for higher values of ratio k and lower values of ratio <italic>R</italic> (k = <italic>M</italic>max/<italic>M</italic>n; <italic>R</italic> = <italic>M</italic>min/<italic>M</italic>max; <italic>M</italic>min – minimal moment of cycle; <italic>M</italic>max – maximal moment of cycle; <italic>M</italic>n – failure moment under short-term loads). The relations for the number of load cycles <italic>N</italic>i are similar.</abstract>

The paper presents a way of taking account of the effect of changing loads on the deflection of RC beams reinforced with ribbed bars. The proposed solutions were verified experimentally, based on the results of tests performed by the author. The beams were subjected to multiple repeatable loads. The deflection increment dependent on the value of the basic parameters characterising the changing loads (cycle maximum load Mmax, stress ratio R, number of load cycles Ni). The increment of the deflection of RC beams reinforced with ribbed bars subjected to changing loads increases with increases in the number of load cycles Ni (logNi, to be more accurate), and is greater for higher values of ratio k and lower values of ratio R (k = Mmax/Mn; R = Mmin/Mmax; Mmin – minimal moment of cycle; Mmax – maximal moment of cycle; Mn – failure moment under short-term loads). The relations for the number of load cycles Ni are similar.

The effect of changing loads on the deflection of RC beams reinforced with ribbed bars

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The paper presents a way of taking account of the effect of changing loads on the deflection of RC beams reinforced with ribbed bars. The proposed solutions...

The effect of changing loads on the deflection of RC beams reinforced with ribbed bars

Published Online: May 23, 2020

Page range: 87 - 95

Received: Oct 15, 2018

DOI: https://doi.org/10.4467/2353737XCT.18.164.9420

Keywords
changing loads, deflection of beams, ribbed bars, RC beams

© 2018 Kazimierz Furtak, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

The effect of changing loads on the deflection of RC beams reinforced with ribbed bars

Published Online: May 23, 2020

Page range: 87 - 95

Received: Oct 15, 2018

DOI: https://doi.org/10.4467/2353737XCT.18.164.9420

Keywordschanging loads, deflection of beams, ribbed bars, RC beams

© 2018 Kazimierz Furtak, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

Keywords
changing loads, deflection of beams, ribbed bars, RC beams