Design of integral abutment bridges for combined thermal and seismic loads

Far, Narges Easazadeh; Maleki, Shervin; Barghian, Majid

doi:10.12989/eas.2015.9.2.415

Cited by 19 publications

(6 citation statements)

References 10 publications

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“…Temperature load is the most crucial factor to determine IAB response [46,47]. The two loading cases of extreme design temperature were applied to the numerical model in accordance with AASHTO LRFD [25]; an extreme temperature rise equal to +16.7 • C and a fall equal to −22.2 • C. To obtain the maximum contraction response, concrete time-dependent effects were included with the thermal effects.…”

Section: Uniform Temperature and Temperature Gradientmentioning

confidence: 99%

Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

et al. 2021

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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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Section: Uniform Temperature and Temperature Gradientmentioning

confidence: 99%

Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

et al. 2021

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“…The horizontal displacement at the top of the equivalent system corresponds to the longitudinal expansion or contraction of the bridge superstructure at the integral abutment. The equations for determining the equivalent embedded length are expressed in different equivalencies in the Table 3 [95]. These equations are plotted in a non-dimensional form and pinned head piles are embedded in uniform soil as presented in Figs.…”

Section: Equivalent Cantilever Approachmentioning

confidence: 99%

“…This equivalent cantilever method currently used in the Massachusetts Highway Department bridge design manual MassDOT (2005) provides a reasonable approximation to moments in pile in engineering practice. To gain insight into IAB performance and design, in these models, besides the soil-structure interaction, there are still two important issues worth discussing: pile length and plastic hinge for nonlinear analyses [95][96][97][98].…”

Section: Equivalent Cantilever Approachmentioning

confidence: 99%

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Naji¹,

Firoozi

Firoozi³

2020

Lat. Am. j. solids struct.

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Bridges are one of the most critical parts of transportation networks that may suffer damages against earthquakes. Also, seismic responses of most bridges are significantly influenced by soil-structure interaction effects. Taking out expansion joints in the bridges may cause many difficulties in design and analysis due to the complexity of soil-structure interaction and nonlinear behavior. The secondary loads on an IAB include seismic load, temperature variation, creep, shrinkage, backfill pressure on back wall and abutment, all of which cause superstructure length and stress variations in girder changes. The purpose of this study is to recognize the most effective parameters of analysis IABs. Findings show that the backfill material behind the IABs has a significant effect on the performance of IABs. Using a compressible material behind the abutments would enhance the in-service performance of IABs. Finally, behaviour of abutment may be greatly affected by thermal load and soil pressure. Thermal expansion coefficient significantly influences girder axial force, girder bending moment, and pile head/abutment displacement.

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“…Since it is well known that the soil-structure interaction signi cantly a ects the response of the bridge system under earthquake load [14,17,18,22,36,37], the modeling of the piles and its surrounding soil was considered to simulate the soil-pile interaction. As shown in Figure 7, the piles were modeled as linear elastic elements that extend 20 m below the pile cap and the tips of the piles were pinned in place.…”

Section: Soil-structure Interaction Modelingmentioning

confidence: 99%

“…In spite of its increasing usage, standard design methods for integral bridges have not been fully established yet that led to the necessity of further research [14][15][16]. e research study of Far et al [17] has presented that thermal and seismic loads greatly affect the design of integral abutment bridges due to the integrity of the structure and complex soil-structure-pile interactions. Similarly, there have been studies concerning the seismic behavior of non-IABs [14,18].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Evaluation of a Fully Integral Concrete Bridge with End‐Restraining Abutments

Choi

Moreno

Lim³

et al. 2019

Advances in Civil Engineering

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A fully integral bridge that is restrained at both ends by the abutments has been proposed to form a monolithic rigid frame structure. Thus, the feasible horizontal force effect due to an earthquake or vehicle braking is mainly prevented by the end-restraining abutments. In a recent study, a fully integral bridge with appropriate end-restraining abutment stiffness was derived for a multispan continuous railroad bridge based on linear elastic behavior. Therefore, this study aims to investigate the nonlinear behavior and seismic capacity of the fully integral bridge and then to assess the appropriate stiffness of the end-restraining abutment to sufficiently resist design earthquake loadings through a rigorous parametric study. The finite element modeling and analyses are performed using OpenSees. In order to obtain the force-deflection curves of the models, nonlinear static pushover analysis is performed. It is confirmed that the fully integral bridge prototype in the study meets the seismic performance criteria specified by Caltrans. The nonlinear static pushover analysis results reveal that, due to the end-restraining effect of the abutment, the lateral displacement of the fully integral bridge is reduced, and the intermediate piers sustain less lateral force and displacement. Then, the sectional member forces are well controlled in the intermediate piers by a proper application of the end-restraining abutments.

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Design of integral abutment bridges for combined thermal and seismic loads

Cited by 19 publications

References 10 publications

Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Seismic Performance Evaluation of a Fully Integral Concrete Bridge with End‐Restraining Abutments

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