Analytical formulation of maximum length limits of integral bridges on cohesive soils

Dicleli, Murat; Albhaisi, Suhail

doi:10.1139/l05-024

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…Therefore, rigorous analysis may be required to assess the capacity of the structure to resist seismic forces. As such, Dicleli [19] proposed a 3D finite-element modeling for seismic analysis of integral bridge. In this model, 3D beam elements were utilized to model the bridge superstructure, the abutment and each pile in a 3D fashion.…”

Section: Dynamic Response Of Integral Bridgesmentioning

confidence: 99%

Structural Design Issues For Integral Abutment Bridges

Nikravan¹

2021

Preprint

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In recent years, integral abutment bridges have been increasingly used in Canada due to their low maintenance costs. Whereas a rational guideline to determine the maximum length and skew angle limits for integral bridges due to temperature variations do not exist in bridge codes. As such, structural behavior of integral bridges subjected to temperature variation was investigated through a numerical modeling. First, detailed 3D finite-element models were developed. The accuracy of finite-element models was validated against data collected from filed testing available in the literature on integral bridges subjected to the seasonal temperature variations and truck loading. Then, a parametric study was carried out to study the effects of key parameters on the performance of integral bridges when subjected to temperature variations. The numerical results indicated that number of design lanes, bridge length, abutment height, abutment-pile connection, pile size and skew angle had a significant impact on the behavior of integral bridges. Based on the data generated from the parametric study, new limits for the maximum length and skew angle of integral bridges based on displacement-ductility limit state of piles were established. Literature review revealed that live load distribution among girders in integral bridges due to truck loading conditions is as yet unavailable. This study is extended to develop new equations to estimate girder live load distribution factors for integral bridges. First, 2D and 3D finite-element models (FEMs) of integral bridges were developed. Then, a parametric study was performed to study the effects of parameters such as abutment height, abutment thickness, wingwall length, wingwall orientation, number of design lanes, span length, girder spacing and number of intermediate diaphragms. The results indicated that the live load distribution factors obtained from the FEMs were lower than those obtained from current CHBDC equations. Consequently, sets of empirical expressions were developed in the form of reduction factors that can be applied to CHBDC live load distribution factors to accurately calculate the girder distribution factors. Also, other set of equations for the live load distribution factors were developed in a similar form as that specified in CHBDC for possible inclusion in the bridge code.

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Section: Dynamic Response Of Integral Bridgesmentioning

confidence: 99%

Structural Design Issues For Integral Abutment Bridges

Nikravan¹

2021

Preprint

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“…i) Piles in predrilled holes are more flexible, however the required pile length to support the bridge dead and live load is more when predrilled holes are adopted. Dicleli & Albhaisi (2005) performance of the piles. The stiffer it gets, the smaller its displacement capacity.…”

Section: Thermal Effectmentioning

confidence: 99%

Study of Horizontally Curved Slab-on-Steel I-Girder Bridges with Integral Abutments Under Thermal Loading

Abdrabbo¹

2021

Preprint

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Integral abutment bridges have started to become part of the construction industry worldwide. However, they present challenges arising from the monolithic connection between bridge deck and the abutment. Thermal loading induced by daily cycles superimposed on seasonal cycles result in complex soil-structure interaction. Due to uncertainties in integral abutment bridge performance, there is no consensus among different codes on the bridge maximum length limit. A parametric study was carried out, using SAP2000 software, to examine the behavior of horizontal curved concrete slap-on-steel Igirders, under the effect of thermal loading conditions (±65°c). The self-weight of the bridge was considered. Spatial variables, including abutment height, radius of curvature, bridge span length, stiffness of backfill and types of foundation soil, were considered. The numerical analysis results were used to drive equation relating abutment height and bridge span with the maximum bridge length limit, which produces 40 mm horizontal displacement on pile head.

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Integral bridges

Dicleli¹

2016

Innovative Bridge Design Handbook

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Analytical formulation of maximum length limits of integral bridges on cohesive soils

Cited by 8 publications

References 6 publications

Structural Design Issues For Integral Abutment Bridges

Structural Design Issues For Integral Abutment Bridges

Study of Horizontally Curved Slab-on-Steel I-Girder Bridges with Integral Abutments Under Thermal Loading

Integral bridges

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