Earth pressure development in integral abutment bridge subjected to thermal loadings

Tan, D., Reid, C., Rajeev, P., Piratheepan, J., and Sivakugan, N. (2014) Earth pressure development in integral abutment bridge subjected to thermal loadings. In: Proceedings of the 8th Australasian Congress on Applied Mechanics. From: ACAM 8: 8th Australasian Congress on Applied Mechanics, 23-26 November 2014, Melbourne, VIC, Australia.

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Integral abutment bridges (IAB)are becoming increasing popular both in Australia and globally due to their low construction and maintenance costs in comparison to traditional road bridges. The abutment of IAB is cast integrally with the deck, thus eliminating the thermal expansion joints. Due to this type of construction, the abutment-backfill system and the piles supporting the abutments may be influenced considerably by temperature induced longitudinal displacements, which create undesirable stresses in the bridge, eventually leading to failure. The daily and seasonal temperature variation induces cyclic thermal movements in IAB that develop an increase in soil pressure behind the abutment wall. The magnitude of the soil pressure can exceed the at-rest pressure or even reach the passive pressure. The increase in soil pressure can lead to unsatisfactory performance of IAB. As no unified earth pressure model currently exists, the methods used to estimate soil pressure are mostly empirical, relying on past experience and assumptions. This paper analyses the soil pressure models used by transportation agencies, to understand the variability among each models and compares these findings with field data.

Item ID: 36987
Item Type: Conference Item (Research - E1)
ISBN: 978-1-922107-35-0
Keywords: earth pressure, jointless bridge, thermal loading, backfill, cyclic movement
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Date Deposited: 19 May 2015 21:56
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 40%
09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 60%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
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