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Low-cycle fatigue effects on lifetime of circular bridges piers considering rocking-enable shallow foundation

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Authors Low-cycle fatigue effects on lifetime of circular bridges piers considering rocking-enable shallow foundation

  Mohammad Barkhordary, - Department of Civil Engineering, Urmia University, Urmia, Iran
  Saeed Tariverdilo, - Department of Civil Engineering, Urmia University, Urmia, Iran
  F. Kiakojouri - Department of Civil Engineering, Urmia University, Urmia, Iran

Abstract:

Cyclic loading during large earthquakes induces low-cycle high-amplitude strain in longitudinal bar of bridge column piers. This phenomenon is known as low-cycle fatigue, which reduce design life of column pier due to longitudinal bars fracture. After recent large earthquakes (e.g. Christchurch in 2011), resilience became a public demand instead of conventional design methods. While conventional design methods mostly relay on plastic hinge formation in column pier as an earthquake resistance system (ERS), modern methods try to reduce demands on ERS in order to assure of resilience. Rocking shallow foundation (RSF) is an earthquake demand reduction system. This research demonstrates how RSF, prevent column pier design life reduction due to low‐cycle fatigue. The obtained results confirm that RSF needs significantly smaller foundation design moments that could result in avoiding costly pile foundation and more importantly, extend life of column piers more than conventional design strategies.

Keywords:

Low-Cycle Fatigue, Buckling, Shallow Foundation, Bridge

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COI code: SECM03_121

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Barkhordary,, Mohammad; Saeed Tariverdilo, & F. Kiakojouri, 2019, Low-cycle fatigue effects on lifetime of circular bridges piers considering rocking-enable shallow foundation, rd International Conference on Applied Researches in Structural Engineering and Construction Management (secm2019), تهران, دانشگاه صنعتي شريف, https://www.civilica.com/Paper-SECM03-SECM03_121.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Barkhordary,, Mohammad; Saeed Tariverdilo, & F. Kiakojouri, 2019)
Second and more: (Barkhordary,; Tariverdilo, & Kiakojouri, 2019)
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Type: state university
Paper No.: 10270
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