Proposed cycle counting method to estimate fatigue damage in integral bridge steel h-piles

Date

2018-08-03

Author

Dicleli, Murat

Metadata

Show full item record

Item Usage Stats

310
views

0
downloads

Several cycle counting methods exist in the literature for the study of fatigue damage generated in structures. Level Crossing, Peak, Simple range and Rainflow counting methods are those using the stress and deformation range to count the number of cycles. Close examination of the existing field measurement data for integral bridges revealed that the measured cyclic strains in steel H-piles consists of large amplitude, primary small amplitude and secondary small amplitude cycles. However, the above mentioned cycle counting methods do not take into consideration the primary and secondary small amplitude strain cycles. Because of the fact that these small strain cycles are part of the low-cycle fatigue effects on steel H piles, a new cycle counting method is developed. The developed cycle counting method is then used to estimate the number of large amplitude strain cycles per year due to seasonal temperature changes and the number and relative amplitude (relative to the amplitude of large amplitude strain cycles) of primary small amplitude strain cycles and secondary small amplitude strain cycles per year due to daily or weekly temperature changes. Then, using the available experimental data, an equation is developed to estimate the fatigue life of integral bridge steel H-piles as a function of the number and amplitude of large, primary small and secondary small amplitude strain cycles. It is observed that small amplitude thermal-induced strain cycles have only a negligible effect on the fatigue life of steel H-piles at the abutments of integral bridges. This is also verified experimentally.

URI

https://hdl.handle.net/11511/72671

Conference Name

10th International Conference on Short and Medium Span Bridges (31 Temmuz - 03 Ağustos 2018)

Collections

Department of Engineering Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Classification of thermal induced strain cycles and study of associated fatigue damage in integral bridge steel H-piles Dicleli, Murat; Karalar, M. (2021-01-01) © 2021 Taylor & Francis Group, LondonSeveral cycle counting methods exist in the literature for the study of fatigue damage generated in structures. Level Crossing, Peak, Simple range and Rainflow counting methods are those using the stress and deformation range to count the number of cycles. Close examination of the existing field measurement data for integral bridges revealed that the measured cyclic strains in steel H-piles consists of large amplitude, primary small amplitude and secondary small amplitud...
An in vitro mechanical comparison of tibial plateau levelling osteotomy plates Bordelon, J.; Çöker, Demirkan; Payton, M.; Rochat, M. (Georg Thieme Verlag KG, 2009-01-01) An in vitro mechanical study was performed to compare the fatigue properties and the loads to failure of four plate designs that are used to stabilise the tibial plateau levelling osteotomy (TPLO). Seventy-two gapped osteotomy models were created using 3.5 mm versions of the following plates: a standard TPLO plate, a low profile TPLO plate, a locking TPLO plate (LocP), and a broad locking TPLO plate (bLocP). The 18 constructs for each plate design were sub-divided into three identical groups of six. Six con...
Development of a new cycle counting method for cyclic thermal strains in integral bridge piles Karalar, M.; Dicleli, Murat (2010-07-15) In this study, a new cycle counting method is developed to determine the number and amplitude of large and small displacement/strain cycles. A new equation is obtained to determine a displacement/strain cycle amplitude representative of a number of small amplitude cycles existing in a typical temperature induced displacement/strain history in steel H-piles of integral bridges. The effect of primary and secondary small cycles are investigated for different integral bridges
Low-Cycle Fatigue Testing of Shear Links and Calibration of a Damage Law Bozkurt, Mehmet Baklr; Kazemzadeh Azad, Sina; Topkaya, Cem (American Society of Civil Engineers (ASCE), 2018-10-01) This paper experimentally studies the low-cycle fatigue (LCF) behavior of shear links in eccentrically braced frames (EBFs) with the aim of calibrating a convenient damage law for estimating the exhausted as well as remaining life of these members under any loading history. A total of 14 specimens are tested using a nearly full-scale EBF setup under constant-amplitude cycles as well as proportional and arbitrary loading histories. A generalized damage law is subsequently calibrated using results of the pres...
EXPERIMENTAL INVESTIGATION OF FATIGUE DAMAGE ACCUMULATION IN 1100-AL ALLOY BILIR, OG (Elsevier BV, 1991-01-01) The cumulative fatigue damage characteristics of 1100 Al alloy were studied to gain a better understanding of the effects of the loading sequence, the percentage of initial applied load cycles and the stress ratio.

Citation Formats

M. Dicleli, “Proposed cycle counting method to estimate fatigue damage in integral bridge steel h-piles,” Quebec, Kanada, 2018, p. 377, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72671.