Determination of Interaction Between Bridge Concrete Approach Slab and Embankment Settlement

Determination of Interaction Between Bridge Concrete Approach Slab and Embankment Settlement PDF

Author: Chunsheng Cai

Publisher:

Published: 2005

Total Pages: 158

ISBN-13:

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The main objective of this research is to correlate the deformation and internal force of the approach slab with the approach embankment settlements and the approach slab parameters such as length and thickness. Finite element analysis was carried out in the present study. This correlation will be used to evaluate the effectiveness of approach slabs and develop guidelines for their structural design. This information will also help determine when settlement controls are necessary. While flat approach slabs may be used for some short span applications, longer span lengths would require very thick slabs. In such cases, ribbed approach slabs (similar to slab-on-beam bridge decks) are proposed in the present study because they provide advantages over the flat slabs. Based on finite element analysis, internal forces and deformations of ribbed slabs were predicted and their designs were conducted. In addition, special studies on a few issues that were not included in the original scope of work were conducted. These special studies including investigating (1) the skew angle effects and the applicability of the developed methodology for right approach slabs to skewed approach slabs; (2) the failure mode/mechanism of the approach slab end and the abutment connection; (3) the applicability of the developed methodology to AASHTO LRFD highway loads; and (4) rating of the developed approach slabs in terms of special trucks.

Settlement Issues -- Bridge Approach Slabs (final Report Phase 1)

Settlement Issues -- Bridge Approach Slabs (final Report Phase 1) PDF

Author: Lary R. Lenke

Publisher:

Published: 2006

Total Pages: 90

ISBN-13:

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The New Mexico Department of Transportation (NMDOT) Bridge Section in conjunction with various NMDOT district engineers have documented settlement issues with bridge approach slabs, i.e., the ubiquitous "bump at the end of the bridge," as a pressing maintenance, safety, construction and design issue. A literature review identifies geotechnical issues with the natural soil foundation and the embankments as the leading contributor to "the bump." A field evaluation of 19 New Mexico bridges suggest that most, if not all, bump problems in the state are associated with geotechnical issues. The lengths of approach slabs in New Mexico are deemed too short. Recommendations for dealing with "the bump" are thorough geotechnical analysis and engineering implementation of this analysis in the design and construction of the natural soil foundation and embankment materials. High quality QA/QC (quality assurance-quality control) is absolutely required. Lengthening of approach slabs is also recommended.

Design and Construction of Bridge Approaches

Design and Construction of Bridge Approaches PDF

Author: Harvey E. Wahls

Publisher: Transportation Research Board

Published: 1990

Total Pages: 56

ISBN-13: 9780309049054

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Includes case histories of the Dumbarton Bridge (San Francisco Bay, Calif.), the Rainier Avenue Embankment (Seattle, Wash.) and the Gallows Road Grade Separation (Fairfax, Va.)

Approach Slab and Its Effect on Vehicle Induced Bridge Vibration

Approach Slab and Its Effect on Vehicle Induced Bridge Vibration PDF

Author: Xiaomin Shi

Publisher: LAP Lambert Academic Publishing

Published: 2009-11

Total Pages: 172

ISBN-13: 9783838319346

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Firstly, this book discussed the structural performance of the approach slab under given embankment settlement. Based on a parametric study, a correlation among the slab parameters, deflections, internal moments, and the differential settlements has been established. Based on finite element analysis, internal forces and deformations of ribbed slabs have been predicted and their designs are conducted. Secondly, a fully computerized vehicle-bridge coupled model has been developed to analyze the effect of approach slab deformation on bridges' dynamic response induced by moving vehicles. With this model, a parametric study reveals that the deformation at the approach span causes significant dynamic responses in short span bridges. Finally, this study investigated the possibility of using tuned mass damper (TMD) to suppress the vehicle-induced bridge vibration under the condition of uneven bridge expansion joints.

Transportation and Geotechniques: Materials, Sustainability and Climate

Transportation and Geotechniques: Materials, Sustainability and Climate PDF

Author: Manik Barman

Publisher: Springer

Published: 2018-07-11

Total Pages: 188

ISBN-13: 3319957686

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This book deals with the attempts made by the scientists, researchers and practitioners to address different emerging issues in transportation and geotechnical engineering. Papers focus on the following: (i) polymer-based dust suppressant,(ii) cement concrete materials, (iii) pavement preservation techniques, (iv) frost front in a cold-region circular tunnel, (v) metro station in non-cemented soil, (vi) seismic-liquefaction, (vii) mechanical responses of asphalt pavement at bridge approach, (viii) warm mix asphalt, and (ix) behavior of pile foundation. This volume is useful for the researchers and practitioners who work in the area transportation and geotechincal engineering. Papers were selected from the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China.

Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing

Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing PDF

Author: Liangbo Hu

Publisher: Springer

Published: 2018-05-03

Total Pages: 547

ISBN-13: 981130095X

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This book is the second volume of the proceedings of the 4th GeoShanghai International Conference that was held on May 27 - 30, 2018. This conference showcased the recent advances and technology in geotechnical engineering, geoenvironmental engineering and transportation engineering. This volume, entitled “Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing”, covers a wide range of topics in soil mechanics, focusing on the behaviours of partially saturated soils, combined effects of multi-physics processes in geological materials and systems, and emerging methods and techniques in geotechnical in-situ testing and monitoring. This book may benefit researchers and scientists from the academic fields of soil and rock mechanics, geotechnical engineering, geoenvironmental engineering, transportation engineering, geology, mining and energy, as well as practical engineers from the industry. Each of the papers included in this book received at least two positive peer reviews. The editors would like to express their sincerest appreciation to all of the anonymous reviewers all over the world, for their diligent work.

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