Effect of High-cyclic Loads on Dynamic Response of Reinforced Concrete Slabs

Jamadin, Adiza and Ibrahim, Zainah and Jumaat, Mohd Zamin and Wahab, Ezahtul Shahreen Ab (2019) Effect of High-cyclic Loads on Dynamic Response of Reinforced Concrete Slabs. KSCE Journal of Civil Engineering, 23 (3). pp. 1293-1301. ISSN 1226-7988, DOI https://doi.org/10.1007/s12205-019-0889-1.

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Official URL: https://doi.org/10.1007/s12205-019-0889-1


Bridge reinforced concrete deck slabs are often subjected to various cyclic loadings—making regular checks for fatigue damage necessary. Several experiments on reinforced concrete structures were conducted to evaluate its mechanical fatigue behaviour. Nevertheless, adequate experimental investigations on its dynamic properties are still needed. This paper reports on the test performed on three identical reinforced concrete slabs, with different cyclic load number and after the cycles, the load was increased up to the static failure. Modal testing was performed after each step of loading to assess their dynamic performance using modal parameters (natural frequencies, mode shapes and damping ratios). Finite element model was used to predict the natural frequency of the reinforced concrete slabs and their reliability was checked through model updating. The results showed the intensity of fatigued structures causes significant changes to the modal parameters and structural loading capacity. The study explores how fatigued structure can be assessed from dynamic performance, and also can be quantified through its structural stiffness, ultimately offering a better way of using non-destructive modal testing in identifying its structural health as compared to conventional testing techniques. © 2019, Korean Society of Civil Engineers.

Item Type: Article
Funders: Fundamental Research Grant Scheme (FRGS-FP004/2014B), Ministry of Education, Malaysia, University Malaya High Impact Research (HIR-UM.C/HIR/ MOHE/ENG/36 (D000036-16001)
Uncontrolled Keywords: fatigue; modal parameters; modal testing; reinforced concrete slab; structural stiffness
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 31 Mar 2020 15:41
Last Modified: 31 Mar 2020 15:41
URI: http://eprints.um.edu.my/id/eprint/24122

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