Behavior of Pile-supported Integral Abutments at Bridge Sites with Shallow Bedrock PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Behavior of Pile-supported Integral Abutments at Bridge Sites with Shallow Bedrock PDF full book. Access full book title Behavior of Pile-supported Integral Abutments at Bridge Sites with Shallow Bedrock by John G. DeLano. Download full books in PDF and EPUB format.
Author: John G. DeLano
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 220
Get Book Here
Book Description
In Maine, there are often cases where the depth to bedrock prohibits integral abutments bridges from being used. The goal of this research is to determine the feasibility of constructing integral abutments in conditions that cannot provide the fixed support conditions that are traditionally assumed. A finite element model was created that incorporates realistic constitutive and surface interaction models.
Author: John G. DeLano
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 220
Get Book Here
Book Description
In Maine, there are often cases where the depth to bedrock prohibits integral abutments bridges from being used. The goal of this research is to determine the feasibility of constructing integral abutments in conditions that cannot provide the fixed support conditions that are traditionally assumed. A finite element model was created that incorporates realistic constitutive and surface interaction models.
Author: Earl Evans Ingram
Publisher:
ISBN:
Category :
Languages : en
Pages : 153
Get Book Here
Book Description
Author: Robert J. Frosch
Publisher:
ISBN: 9781622602445
Category : Transportation
Languages : en
Pages :
Get Book Here
Book Description
Integral abutment bridges have been used in the United States for decades. By eliminating expensive expansion joints, the piles supporting the end bent accommodate the total thermal movement of the bridge. Currently, integral bridges are designed based upon experience, and a rational design specification has not been developed. Furthermore, the interaction of the abutment, pile, and soil remains uncertain. A better understanding regarding the behavior of this system is needed. The objective of this research is to evaluate the behavior of the integral abutment-pile system and evaluate any limitations of its use. To achieve this objective, two phases of research were conducted. The first phase was a field study that investigated the in-service pile behavior of four integral abutment bridges. The second phase was an experimental study that was used to evaluate the capability of piles typically used in integral abutment bridges. Nine low-cycle, large amplitude lateral displacement pile tests were conducted. Throughout both phases, analytical investigations were also conducted. To develop simplified modeling techniques that sufficiently account for soil-pile interaction, the piles supporting abutments were analytically modeled and calibrated based on the field and experimental results. A parametric study was also performed with variables including pile type, pile orientation, axial load, pile length, and soil type. The results of these phases were evaluated and design recommendations were developed based on these results. Overall, the design recommendations provide for an extension in the length limits often used for integral bridges. The extension of these limits can result in a reduction in bridge construction and maintenance costs for a large number of structures that cannot currently be built using this structural system.
Author: Christopher Allen Myers
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 186
Get Book Here
Book Description
Author: Robert J. Frosch
Publisher: Joint Transportation Research Program
ISBN: 9781622600120
Category :
Languages : en
Pages : 149
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The Tennessee Department of Transportation (TDOT) has designed and built integral abutment bridges with prestressed concrete piles for many years. A product of constructing integral bridge abutments is that the piles supporting the structure are exposed to lateral deflections, which come mainly from thermal expansion and contraction of the bridge structure. TDOT funded a project in which the University of Tennessee, Knoxville investigated the effects of the lateral displacement of four 14 inch square prestressed concrete piles that were driven into virgin clay soil. The tests involved full scale lateral loading each of the four prestressed piles; each pile supported a simulated integral bridge abutment. After each pile was driven into the ground, the model abutment and a "pulling slab" were cast on top of the pile. Leaving one foot of pile exposed between the abutment and the ground, University personnel instrumented each pile with strain gages on that exposed surface. The tests then included a basic testing regime of lateral displacements that depended on incremental displacement and time rate of loading. During the tests, moments, deflections, and shears were recorded at the pile-abutment interface. LPILE is a program that uses a finite difference analysis to calculate the behavior of a pile. While the piles in the field were not instrumented below the surface of the ground, LPILE was used to develop moment versus depth diagrams. Also the analysis evaluated shear and displacement versus depth graphs. LPILE was evaluated on its ability to predict the values measured at the pile abutment interface in the field tests and the consistency with which LPILE located maximum values and inflection points. The LPILE analyses were crude approximations of measured values.
Author: Voraniti Chovichien
Publisher:
ISBN:
Category :
Languages : en
Pages : 489
Get Book Here
Book Description
Author: Narongrit Butrieng
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 210
Get Book Here
Book Description
Author: Robert Emil Abendroth
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 76
Get Book Here
Book Description
This report presents the details of the first integral abutment bridge in the state of Iowa that utilized precast, prestressed concrete piles in the abutment. The bridge, which was constructed in Tama County in 2000, consists of a 110 ft. long, 30 ft. wide, single-span PC girder superstructure with a left-side-ahead 20 degree skew angle. The bridge was instrumented with a variety of strain gages, displacement sensors, and thermocouples to monitor and help in the assessment of structural behavior. The results of this monitoring are presented, and recommendations are made for future application of precast, prestressed concrete piles in integral abutment bridges.
Author: Anthony Francis Zeind
Publisher:
ISBN:
Category :
Languages : en
Pages : 198
Get Book Here
Book Description
