Novel Pile-to-Pilecap Connection Under Lateral Load

Pile-to-pilecap connection such as in integral abutment bridges is vulnerable to lateral loads as well as seismic loads. This connection may govern the bridge strength and performance against various lateral loads. However, previous researches have merely focused on the connection between pile and pilecap. Preliminary study has investigated possible crack patterns between concrete pilecap and steel HP pile using finite element analyses. It was found that the crack patterns are sensitive to the boundary conditions specified in the simulation. The reinforcement detail specified in PennDOT DM4 was barely effective in controlling crack growing but spiral rebar was proved to be effective in delaying crack growth as well as absorbing energy capacity. In this study, two types of connection details of (1) HSS tube type and (2) removed flange type were investigated in terms of crack control. The connection with a HSS tube exhibited to be effective in prevention of crack propagations from the surface of the bottom pilecap. However, second crack was initiated from the corner region of the tube after first crack was arrested; resulting in lower energy absorption capacity compared to both spiral and removed flange details. In the connection with removed flange, concrete crack initiations were mitigated or delayed successfully.

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Concrete Crack Control of Pile-to-Pilecap Connection in Integral Abutment Bridges under Cyclic Bridge Movement

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.753-755.462 ◽

2013 ◽

Vol 753-755 ◽

pp. 462-466 ◽

Cited By ~ 2

Author(s):

Woo Seok Kim ◽

Jae Ha Lee ◽

Chan Jeoung

Keyword(s):

Seismic Loads ◽

Finite Element Analyses ◽

Integral Abutment ◽

Integral Abutment Bridges ◽

Crack Control ◽

Concrete Crack ◽

Abutment Bridges ◽

And Performance ◽

Simultaneous Translation ◽

Spiral Type

Steel pile-concrete abutment connection in integral abutment bridges is vulnerable to cyclic bridge movement as well as seismic loads. Although this connection may determine the bridge strength and performance against the above loads, previous researches have merely focused on this connection. This study has investigated crack patterns using finite element analyses. The bridge movements were classified into three cases: (1) translation only; (2) rotation only; and (3) simultaneous translation and rotation. The identified cracks were diagonally occurred from the steel pile. PennDOT DM-4 reinforcement detail was hardly effective in controlling crack growing. This study also investigated spiral type reinforcement for the connection, and this type of reinforcement detail significantly improved the crack control capacity in integral abutment bridges.

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Jane Addams Tollway I-90 Bridges over the Kishwaukee River - New standards for Integral Abutment Bridges

IABSE Symposium Report ◽

10.2749/222137814814067806 ◽

2014 ◽

Vol 102 (21) ◽

pp. 1391-1396

Author(s):

Salvatore Di Bernardo

Keyword(s):

Integral Abutment ◽

Integral Abutment Bridges ◽

Jane Addams ◽

Abutment Bridges

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Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

Applied Sciences ◽

10.3390/app11115031 ◽

2021 ◽

Vol 11 (11) ◽

pp. 5031

Author(s):

Wooseok Kim ◽

Jeffrey A. Laman ◽

Farzin Zareian ◽

Geunhyung Min ◽

Do Hyung Lee

Keyword(s):

Prestressed Concrete ◽

Extreme Temperature ◽

Bending Moment ◽

Design Guidelines ◽

Time Dependent ◽

Steel Bridge ◽

Integral Abutment ◽

Integral Abutment Bridges ◽

Construction Joint ◽

Abutment Bridges

Although integral abutment bridges (IABs) have become a preferred construction choice for short- to medium-length bridges, they still have unclear bridge design guidelines. As IABs are supported by nonlinear boundaries, bridge geometric parameters strongly affect IAB behavior and complicate predicting the bridge response for design and assessment purposes. This study demonstrates the effect of four dominant parameters: (1) girder material, (2) bridge length, (3) backfill height, and (4) construction joint below girder seats on the response of IABs to the rise and fall of AASHTO extreme temperature with time-dependent effects in concrete materials. The effect of factors influencing bridge response, such as (1) bridge construction timeline, (2) concrete thermal expansion coefficient, (3) backfill stiffness, and (4) pile-soil stiffness, are assumed to be constant. To compare girder material and bridge geometry influence, the study evaluates four critical superstructure and substructure response parameters: (1) girder axial force, (2) girder bending moment, (3) pile moment, and (4) pile head displacement. All IAB bridge response values were strongly related to the four considered parameters, while they were not always linearly proportional. Prestressed concrete (PSC) bridge response did not differ significantly from the steel bridge response. Forces and moments in the superstructure and the substructure induced by thermal movements and time-dependent loads were not negligible and should be considered in the design process.

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Behaviour of H-piles supporting an integral abutment bridge

Canadian Geotechnical Journal ◽

10.1139/cgj-2013-0254 ◽

2014 ◽

Vol 51 (7) ◽

pp. 713-734 ◽

Cited By ~ 7

Author(s):

Shelley A. Huntley ◽

Arun J. Valsangkar

Keyword(s):

Axial Load ◽

Integral Abutment ◽

Integral Abutment Bridges ◽

Expansion Joints ◽

Thermal Bridge ◽

Double Curvature ◽

Abutment Bridges ◽

Integral Abutments ◽

Integral Abutment Bridge ◽

Lateral Displacements

Integral abutment bridges accommodate thermal superstructure movements through flexible foundations rather than expansion joints. While these structures are a common alternative to conventional design, the literature on measured field stresses in piles supporting integral abutments appears to be quite limited. Therefore, field data from strain gauges installed on the abutment foundation piles of a 76 m long; two-span integral abutment bridge are the focus of this paper. Axial load, weak- and strong-axis bending moments of the foundation piles, as well as abutment movement and backfill response, are presented and discussed. Results indicate that the abutment foundation piles are bending in double curvature about the weak axis, as a result of thermal bridge movements, and bending also about the strong axis due to tilting of the abutments. A simple subgrade modulus approach is used to show its applicability in predicting behaviour under lateral loading. In the past, much emphasis has been placed on the lateral displacements of piles and less on variations of axial load. In this paper, a new hypothesis, which offers insight into the mechanisms behind the observed thermal variations in axial load, is proposed and assessed. The data from the field monitoring are also compared with the limited data reported in the literature.

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