Abstract
AbstractBridges are among the most important transportation elements that may be damaged by earthquakes. An integral abutment bridge (IAB) is a bridge linking the superstructure directly to the substructure. As soil piles, abutments, and superstructures act as a combined system to resist lateral loading on the bridge, soil stiffness has a major impact on load distribution. This research attempts to determine how the structure and soil parameters affect the IABs. The parametric study consists of four variables, namely bridge span (short, medium, and large spans were 18.3, 35.4, and 64.5 m, respectively), backfill height/pressure (3.1, 4.6, and 6.1 m, respectively), stiffness of soil mixture backfills (high, intermediate, and low), and soil density around the piles (high, intermediate, and low). Because of the small width–length ratio of the bridge, a 2D model of an IAB with soil springs around the piles and abutments was developed with finite element software. Findings show that the value of the backfill pressure affects girder axial forces and girder bending moments at the IAB. Also, the stiffness of soil mixture backfills is an important factor to change lateral displacements, while less movement is related to high stiffness of soil mixture backfills with intermediate clay around the pile. It is clear that the maximum axial girder moments at the superstructure generally decrease when the stiffness of the soil mixture behind the abutments and around piles increases, similar to pile deflection and abutment displacements. In addition to maximum abutment, the head moment decreases when abutment backfill is dense and increases when piles are located in hard clay, similar to pile moments. Lastly, dense sand backfill behind abutments is recommended since it decreases pile deflections, pile lateral forces, abutment displacements, abutment head moments, and particularly pile bending moments.
Publisher
Springer Science and Business Media LLC
Subject
Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering
Reference41 articles.
1. Abdel-Fattah MT, Abdel-Fattah TT (2019) Behavior of integral frame abutment bridges due to cyclic thermal loading: nonlinear finite-element analysis. J Bridg Eng 24(5):04019031. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001394
2. Arsoy S, Barker RM, Duncan JM (1999) The behavior of integral abutment bridges. Virginia Transportation Research Council
3. Abdelrahman A, Tawfik M, El-Saify A (2018) Investigation on the performance of bridge approach slab. In: MATEC Web of Conferences, EDP Sciences. vol 162, p 04014. https://doi.org/10.1051/matecconf/201816204014
4. Barghian M, Khatibi SK, Hajialilue-Bonab M (2020) Soil behavior around the stub abutment of an integral bridge and buried piles in the contraction state. Sci Iran Trans A Civ Eng 27(1):88–104. https://doi.org/10.24200/SCI.2018.20030
5. Barker RM, Duncan JM, Rojiani KB, Ooi PS, Tan CK, Kim SG (1991) Manuals for the design of bridge foundations: shallow foundations, driven piles, retaining walls and abutments, drilled shafts, estimating tolerable movements, and load factor design specifications and commentary (No. 343)
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献