Behavior of Pile-supported Integral Abutments at Bridge Sites with Shallow Bedrock PDF Download
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Author: John G. DeLano
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 220
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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
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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: Sarah L. Hartt
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 214
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Book Description
The objective of this research is to expand the use of pile-supported integral abutment bridges bearing on bedrock at sites where the depth to bedrock is considered shallow, less than 4m (13 ft) from the ground surface. The objective of Phase II of this two-part research project is to finalize the design and construction guidelines by incorporating the performance of a constructed, skewed integral abutment bridge on shallow bedrock into the guidelines. Part (a) of Phase II (this report) includes instrumentation installation, construction monitoring, and full-scale live load testing on the Nash Stream Bridge in Coplin Plantation, ME.
Author: Robert Emil Abendroth
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 76
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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:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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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: Jimin Huang
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 726
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Author: Robert J. Frosch
Publisher:
ISBN:
Category :
Languages : en
Pages : 3
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Book Description
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.
Author: Earl Evans Ingram
Publisher:
ISBN:
Category :
Languages : en
Pages : 153
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Author: Christopher Allen Myers
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 186
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Author: James L. Jorgenson
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 31
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Author: Narongrit Butrieng
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 210
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Book Description
