Integral abutment bridges and the modeling of soil-structure interaction

Integral Abutment Bridges (IABs) are joint-less bridges whereby the deck is monolithic with the abutment walls. IABs are outperforming their non-integral counterparts in economy and safety. Thermal effects introduce significantly complex and nonlinear soil-structure interaction into the response of abutment walls and piles of the IB. This paper carried out comprehensive study on voided slab system with five spans bridge each span is 17m long. The bridge has been modelled using SAP software. The abutments and pile foundations are modeled taking into consideration the soil-structure interaction. The study covered a design uniform temperature change of (10, 20, 30, 40 and 50) °C. To gain a better understanding of the mechanism of load transfer due to thermal actions, a 3D frame anal¬ysis is carried out on the above mentioned IABs. The results showed wide range of different linear and lightly non-linear relationships between temperature range, deformations and moments. The paper highlighted the serious effect of the deformations resulting from the repeated temperature change which causes drop in soil or bombing at the abutments ~ embankment contact zone.

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Comparison of Modal Behaviour of Integral Abutment Bridge With and Without Soil–Structure Interaction

Lecture Notes in Civil Engineering - Recent Advances in Structural Engineering, Volume 2 ◽

10.1007/978-981-13-0365-4_21 ◽

2018 ◽

pp. 245-253 ◽

Cited By ~ 1

Author(s):

Sreya Dhar ◽

Kaustubh Dasgupta

Keyword(s):

Soil Structure ◽

Soil Structure Interaction ◽

Integral Abutment ◽

Structure Interaction ◽

Integral Abutment Bridge

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Seismic Response of Skewed Integral Abutment Bridges under Near-Fault Ground Motions, Including Soil–Structure Interaction

Applied Sciences ◽

10.3390/app11073217 ◽

2021 ◽

Vol 11 (7) ◽

pp. 3217

Author(s):

Qiuhong Zhao ◽

Shuo Dong ◽

Qingwei Wang

Keyword(s):

Seismic Response ◽

Soil Structure ◽

Ground Motions ◽

Integral Abutment ◽

Skew Angle ◽

Nonlinear Dynamic Response ◽

Integral Abutment Bridges ◽

Near Fault ◽

Abutment Bridges ◽

Pulse Type

Studies on the seismic response of skewed integral abutment bridges have mainly focused on response under far-field non-pulse-type ground motions, yet the large amplitude and long-period velocity pulses in near-fault ground motions might have significant impacts on bridge seismic response. In this study, the nonlinear dynamic response of an skewed integral abutment bridge (SIAB) under near-fault pulse and far-fault non-pulse type ground motions are analyzed considering the soil–structure interaction, along with parametric studies on bridge skew angle and compactness of abutment backfill. For the analyses, three sets of near-fault pulse ground motion records are selected based on the bridge site conditions, and three corresponding far-field non-pulse artificial records are fitted by their acceleration response spectra. The results show that the near-fault pulse type ground motions are generally more destructive than the non-pulse motions on the nonlinear dynamic response of SIABs, but the presence of abutment backfill will mitigate the pulse effects to some extent. Coupling of the longitudinal and transverse displacements as well as rotation of the bridge deck would increase with the skew angle, and so do the internal forces of steel H piles. The influence of the skew angle would be most obvious when the abutment backfill is densely compacted.

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