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Sustainability 2018, 10(3), 833; https://doi.org/10.3390/su10030833

Numerical Analysis of the Behavior of an IPM Bridge According to Super-Structure and Sub-Structure Properties

1
Kumoh National Institute of Technology, Gumi-si 39177, Korea
2
Research Institute of Korea Expressway Corporation, Hwaseong-si 18489, Korea
*
Author to whom correspondence should be addressed.
Received: 28 January 2018 / Revised: 9 March 2018 / Accepted: 14 March 2018 / Published: 15 March 2018
(This article belongs to the Collection Sustainable Built Environment)
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Abstract

A bridge with an integrated and pile-bent abutment with a mechanically stabilized earth-wall (IPM) was developed by separating earth pressure from the abutment to overcome the problems typically faced by integral abutment bridges. Also, the IPM bridge removes expansion joints and bearing by integrating the super-structure and the abutment and does not need many piles because it separates the earth pressure from backfills. Therefore, it is superior in cost, durability, and maintainability to traditional bridges and is sustainable due to using less material. A numerical analysis was conducted to ascertain the behavior of the IPM bridge according to its super-structural and sub-structural characteristics. Based on the analysis results, the behaviors of the IPM bridge are as follows: The bending moments ( M y ) of the pre-stressed concrete (PSC) girder and the steel-plate girder of the bridge were influenced by the presence of the time-dependent loads. The contraction behavior in the PSC girder is largely due to the time-dependent loads, whereas the expansion behavior in the steel-plate girder is large due to its greater thermal expansion coefficient and temperature range compared with those of the PSC girder. In general, the suggested bridge length limit for PSC girders in both the integral abutment bridge and the IPM bridge is larger than that in a steel bridge. This needs to be reviewed again with consideration of the long-term and seasonal behaviors. View Full-Text
Keywords: IPM bridge; integral abutment bridge; structural analysis; superstructure; substructure IPM bridge; integral abutment bridge; structural analysis; superstructure; substructure
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Park, M.; Nam, M.S. Numerical Analysis of the Behavior of an IPM Bridge According to Super-Structure and Sub-Structure Properties. Sustainability 2018, 10, 833.

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