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Behavior Of Semi Integral Abutment Bridge With Turn Back Wingwalls Supported On Drilled Shafts
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Book Synopsis Behavior of Semi-integral Abutment Bridge with Turn-back Wingwalls Supported on Drilled Shafts by : Safiya Ahmed
Download or read book Behavior of Semi-integral Abutment Bridge with Turn-back Wingwalls Supported on Drilled Shafts written by Safiya Ahmed and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semi-integral abutment bridges are integral abutment bridges with a flexible interface at the abutment to reduce the force transferred to the foundation. Wingwalls in abutment and semi-integral abutment bridges are designed as retaining walls to avoid the sliding of the backfill soil behind the bridge abutments and roadways. Using turn-back wingwalls that are parallel to the bridge diaphragm can provide support for the parapets and minimize the total longitudinal pressure on the abutments. These walls are subjected to axial forces and bending moments due to the thermal movements. These forces can affect the orientation and the connection details of the wingwalls, which could cause cracks in the wingwalls. Despite several studies on integral abutment bridges, there are no studies that combined the behavior of the drilled shafts, footings, abutment walls, and the turnback wingwalls of semi-integral abutment bridges. The long-term performance of a semi-integral abutment bridge with turn-back wingwalls supported on drilled shafts in Ohio was investigated in this doctorate study by instrumenting five drilled shafts, footing, the forward abutment wall, and one of the wingwalls during construction. Strain and temperature were collected in 2017, 2018, and 2019. It was found that the seasonal and daily temperature changes have a significant effect on the changes in the strain in the substructure. The behavior of the abutment wall significantly affects the behavior of the wingwall, footing, and drilled shafts. It was also noticed that the behavior of the abutment was irreversible, and the top of the abutment wall and the top of the drilled shaft induced higher strain than the bottom. Cracks were noticed at the front face of the abutment wall and wingwall, and these cracks tended to close as the air temperature decreased and open as the air temperature increased. The extremely cold weather conditions induced tensile strain higher than the allowable strain at the top corner of the front face of the abutment wall and the rear face of the wingwall. Finite element results were compared with the field data, and the behavior of the substructure was achieved by the model. Parametric studies were conducted on the bridge substructure with different wingwall types and soil backfill. The results showed lower stiffness of soil backfill induces higher stresses in the bridge substructure. Moreover, inline wingwalls induce the highest thermal stresses in the substructure, while flared wingwalls induce the lowest thermal stress compared to the other types of wingwalls.
Book Synopsis Modeling the Effects of Turned Back Wingwalls for Semi-integral Abutment Bridges by : Matthew T. Jozwiak
Download or read book Modeling the Effects of Turned Back Wingwalls for Semi-integral Abutment Bridges written by Matthew T. Jozwiak and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As jointless bridges become more popular, there is a greater need to understand all aspects of their behavior. Significantly more research has been conducted on integral abutment bridges than there has been on semi-integral abutment bridges, therefore there is a need for more investigation into this type of bridge. Parametric studies on jointless bridges in the past often dealt with variations of the superstructure like altering the span length or skew. This research is an examination of a unique case for a jointless bridge that aims to provide a look into the behavior of the substructure. The subject for the research is a semi-integral abutment bridge with turned back wingwalls and drilled shafts. Semi-integral bridges are less common than integral bridges, and one with turned back wingwalls is constructed even less frequently. The turned back wingwall style of this bridge makes it a good subject for research because little is known about the effect of wingwall orientation on the stress patterns throughout semi-integral abutments. This research will provide a look into the behavior of a semi-integral abutment as the wingwall angle is changed from turned back to flared.
Book Synopsis Long Term Behavior of Integral Abutment Bridges by : Robert J. Frosch
Download or read book Long Term Behavior of Integral Abutment Bridges written by Robert J. Frosch and published by . This book was released on 2011 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integral abutment bridges, a type of jointless bridge, are the construction option of choice when designing highway bridges in many parts of the country. Rather than providing an expansion joint to separate the substructure from the superstructure to account to volumetric strains, an integral abutment bridge is constructed so the superstructure and substructure are continuous. The abutment is supported by a single row of piles which must account for the longitudinal movement previously accommodated by the joints. The primary advantage of an integral abutment bridge is that it is jointless (expansion joints are eliminated) and thus reduces both upfront and overall life-cycle costs. In addition to other benefits provided by integral construction, the reduction in overall cost has led to INDOT requiring all new structures within certain geometric limitation be integral. These geometric limitations, traditionally based on engineering judgment, have been modified over time based as investigations have revealed more about the behavior of integral abutment bridges. While there has been a considerable amount of research and investigation conducted on the behavior of integral abutment bridges, information is limited on both long-term behavior and the effects of highly skewed structures. Because there is a great desire for the application of these structures to be expanded, this research serves to expand the understanding of the behavior of integral abutment structures. Additionally, updated geometric limitations are recommended along with design recommendations and recommended analysis procedures for properly modeling integral abutment behavior.
Book Synopsis Forces Exerted in the Wingwalls of Skewed Semi-integral Bridges by : Eric P. Steinberg
Download or read book Forces Exerted in the Wingwalls of Skewed Semi-integral Bridges written by Eric P. Steinberg and published by . This book was released on 2001 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the state of Ohio, semi-integral bridges have become more popular because these bridges eliminate high maintenance joints. The girders in a semi-integral bridge are encased in a diaphragm supported on elastomeric pads that bear on the abutment. Movement of the diaphragm caused by thermal change is theoretically resisted by backfill and also by the wingwalls for skewed bridges. The wingwalls are subjected to forces as a skewed bridge rotates during thermal expansion.
Book Synopsis Instrumentation and Monitoring of an Integral Abutment Bridge Supported on HP-Steel Piles/concrete Drilled Shafts by : Ashley E. Cook
Download or read book Instrumentation and Monitoring of an Integral Abutment Bridge Supported on HP-Steel Piles/concrete Drilled Shafts written by Ashley E. Cook and published by . This book was released on 2010 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forces in Wingwalls from Thermal Expansion of Skewed Semi-integral Bridges by : Eric P. Steinberg
Download or read book Forces in Wingwalls from Thermal Expansion of Skewed Semi-integral Bridges written by Eric P. Steinberg and published by . This book was released on 2010 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jointless bridges, such as semi-integral and integral bridges, have become more popular in recent years because of their simplicity in the construction and the elimination of high costs related to joint maintenance. Prior research has shown that skewed semi-integral bridges tend to expand and rotate as the ambient air temperature increases through the season. As a result of the bridge movement, forces are generated and transferred to the wingwalls of the bridge. ODOT does not currently have a procedure to determine the forces generated in the wingwalls from the thermal expansion and rotation of skewed semi-integral bridges. In this study, two semi-integral bridges with skews were instrumented and monitored for behavior at the interface of the bridge's diaphragm and wingwall. A parametric analysis was also performed to determine the effects of different spans and bridge lengths on he magnitude of the forces. Based on the field results from the study it is recommended for the design of the wingwalls turned to run nearly parallel with the longitudinal axis of skewed semi-integral bridges should include a 100 psi loading at the wingwall/diaphragm interface from the thermal expansion of the bridge. In addition, analytical evaluations showed that longer spans and higher skews than allowed by ODOT's BDM could be used. However, additional considerations for larger movements and stresses generated at the wingwall/diaphragm interface would need to be considered in designs. Finally, bearing retainers in diaphragms, if used, require adequate cover to avoid spalling of concrete.
Author :Robert J. Frosch Publisher :Joint Transportation Research Program ISBN 13 :9781622600120 Total Pages :149 pages Book Rating :4.6/5 (1 download)
Book Synopsis Long-Term Behavior of Integral Abutment Bridges by : Robert J. Frosch
Download or read book Long-Term Behavior of Integral Abutment Bridges written by Robert J. Frosch and published by Joint Transportation Research Program. This book was released on 2011-08-15 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integral abutment (IA) construction has become the preferred method over conventional construction for use with typical highway bridges. However, the use of these structures is limited due to state mandated length and skew limitations. To expand their applicability, studies were implemented to define limitations supported by rational analysis rather than simply engineering judgment. Previous research investigations have resulted in larger length limits and an overall better understanding of these structures. However, questions still remain regarding IA behavior; specifically questions regarding long-term behavior and effects of skew. To better define the behavior of these structures, a study was implemented to specifically investigate the long term behavior of IA bridges. First, a field monitoring program was implemented to observe and understand the in-service behavior of three integral abutment bridges. The results of the field investigation were used to develop and calibrate analytical models that adequately capture the long-term behavior. Second, a single-span, quarter-scale integral abutment bridge was constructed and tested to provide insight on the behavior of highly skewed structures. From the acquired knowledge from both the field and laboratory investigations, a parametric analysis was conducted to characterize the effects of a broad range of parameters on the behavior of integral abutment bridges. This study develops an improved understanding of the overall behavior of IA bridges. Based on the results of this study, modified length and skew limitations for integral abutment bridge are proposed. In addition, modeling recommendations and guidelines have been developed to aid designers and facilitate the increased use of integral abutment bridges.
Book Synopsis Behavior of Concrete Integral Abutment Bridges by : Jimin Huang
Download or read book Behavior of Concrete Integral Abutment Bridges written by Jimin Huang and published by . This book was released on 2004 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Extending Integral Concepts to Curved Bridge Systems by : Saeed Eghtedar Doust
Download or read book Extending Integral Concepts to Curved Bridge Systems written by Saeed Eghtedar Doust and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The behavior of integral abutment systems and the extension of their application to curved bridges are investigated. First, the stresses in the elements of a typical integral abutment are studied by conducting nonlinear finite element analysis using the software package Abaqus. The results are design recommendations for the details of such abutments. The effect of integral abutments on the responses of bridges is also investigated. Steel and concrete bridge systems are studied separately. The studied steel bridge systems are composed of composite I-girder superstructures and integral abutments supported on steel H-piles. A series of finite element studies for different bridge lengths and radii are conducted and the effects of several load cases on the bridges are studied. In these bridges, the stresses in the abutment piles are of critical importance from the design standpoint. The results show that horizontal curvature mitigates these stresses. The bridge movement is also studied and a procedure to find the end displacements of curved bridges is presented. Pile orientation is another significant design factor that is studied elaborately. The results indicate that, for straight bridges, the strong-axis pile bending yields lower levels of stress. A method for finding the optimum pile orientation in curved integral bridges is developed. The effect of different bearing types is also investigated. This investigation reveals the superior structural performance of elastomeric bearings compared to other bearing types. The concrete bridge systems that are studied consist of voided slab superstructures, integral abutments and concrete drilled shafts. A matrix of finite element studies is performed for different lengths and curvatures. Similar to steel I-girder bridges, it is concluded that horizontal curvature mitigates the internal forces of the abutment elements. The orientation of the concrete shafts is also examined which again shows the advantage of strong-axis orientation. Integral abutment bridges can have flexible piers integrally connected to the superstructure to eliminate all the bridge bearings. The effect of such integral piers on the internal forces of integral abutments is also examined. In these flexible piers, moment magnification can be of crucial significance. It is shown that choosing the integral abutment system reduces the magnification effects in the slender pier columns compared to jointed bridge systems.
Book Synopsis Behavior of High Performance Concrete Integral Abutment Bridges by : David Jonathan Knickerbocker
Download or read book Behavior of High Performance Concrete Integral Abutment Bridges written by David Jonathan Knickerbocker and published by . This book was released on 2005 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Integral Abutment Bridges by : Christine Bonczar
Download or read book Behavior of Integral Abutment Bridges written by Christine Bonczar and published by . This book was released on 2005 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project investigated the seasonal behavior of integral abutment bridges through field monitoring and finite element modeling (FEM). The Orange-Wendell Bridge was used as a case study for the project. The structure was instrumented with 85 gages measuring bridge movements and forces (temperature gages, joint meters, tilt meters, strain gages, earth pressure cells, thermistors and four inclinometer casings for manual readings). Instruments were monitored by the University of Massachusetts at Amherst from January 2002 through December 2004. Both 2-D and 3-D FEM of the bridge were developed using GTSTRUDL and calibrated to the field data. Parametric FEM was performed to evaluate the influence of soil properties and construction practices on bridge behavior.
Book Synopsis Behavior of Abutment Piles in an Integral Abutment Bridge by : James L. Jorgenson
Download or read book Behavior of Abutment Piles in an Integral Abutment Bridge written by James L. Jorgenson and published by . This book was released on 1983 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Integral Abutment Bridges by : Christine H. Bonczar
Download or read book Behavior of Integral Abutment Bridges written by Christine H. Bonczar and published by . This book was released on 2005 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of Integral Abutment Bridge Behavior by : Diana Irma Flores
Download or read book An Evaluation of Integral Abutment Bridge Behavior written by Diana Irma Flores and published by . This book was released on 1994 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of abutment piles in an integral abutment bridge by :
Download or read book Behavior of abutment piles in an integral abutment bridge written by and published by . This book was released on 1981 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior and Analysis of an Integral Abutment Bridge by : Conner D. Huffaker
Download or read book Behavior and Analysis of an Integral Abutment Bridge written by Conner D. Huffaker and published by . This book was released on 2013 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of abutment spalling on the integral abutment bridge over 400 South Street in Salt Lake City, Utah, the Utah Department of Transportation (UDOT) instigated research measures to better understand the behavior of integral abutment bridges. The bridge was instrumented with survey targets and monitored each month for one year. The monthly surveys were also supplemented by a day-long survey. Measurements of temperature change and span length were obtained and used to show general trends in the movement of the 400 South Street Bridge.
Book Synopsis Monitoring of Integral Abutment Bridges and Design Criteria Development by : Jeffrey A. Laman
Download or read book Monitoring of Integral Abutment Bridges and Design Criteria Development written by Jeffrey A. Laman and published by . This book was released on 2009 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to revise and make more accurate integral abutment bridge design criteria based on observed structural behavior and results of numerical parametric studies. Observed behaviors were on the basis of field monitoring conducted at 4 integral abutment bridge sites and a weather station utilizing previously installed instrumentation and data acquisition systems. Integral abutment bridge engineering data were continuously collected over the entire contract period at bridges 109, 203, 211, and 222 and compiled, processed and evaluated. Numerical parametric studies were conducted on the basis of 2D and 3D finite element models, developed and calibrated to the observed integral abutment behavior, in order to evaluate the field performance of integral abutments and establish the range of potential applications for integral abutment bridge construction in Pennsylvania.
