Longitudinal Seismic Response of Concrete Substructure-to-steel Superstructure Integral Bridge Connections PDF Download
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Author: Jill Kathleen Patty
Publisher:
ISBN:
Category :
Languages : en
Pages : 810
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Book Description
Author: Jill Kathleen Patty
Publisher:
ISBN:
Category :
Languages : en
Pages : 810
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Book Description
Author: Jill Patty
Publisher:
ISBN:
Category : Box girder bridges
Languages : en
Pages : 420
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Book Description
Author: Wagdy G. Wassef
Publisher: Transportation Research Board
ISBN: 0309088127
Category : Box girder bridges
Languages : en
Pages : 98
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Book Description
Introduction and research approach -- Findings -- Interpretation, appraisal, and application -- Conclusions and suggested research -- References -- Appendixes.
Author: Roland Nimis
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 626
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Book Description
Author: Justin R. Vander Werff
Publisher:
ISBN:
Category :
Languages : en
Pages : 368
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Book Description
Bridges with integral connections exhibit improved seismic performance and are useful in providing increased clearances. Integral bridges with steel girders are feasible and provide decreased seismic mass to further enhance seismic performance. However, most bridges in seismic regions that have been built with integral connections have been designed with concrete superstructures and concrete cap beams, and most of the research that has been conducted on integral connections for seismic regions has also dealt with concrete cap and girder sections. For this reason, the National Cooperative Highway Research Program has funded a project investigating the performance of concrete columns and steel superstructures in integral pier bridges under seismic loading. The focus of the project involved the development of a prototype bridge, investigation of suitable connection details and optimum member dimensions, load distribution in the structure, and overall seismic performance. These areas were examined using a combination of analytical and experimental studies. The prototype bridge developed in this study consists of a concrete column; steel, box-shaped cap beam; and steel girders. Two one-third-scale test specimens were developed, constructed, and tested as part of the experimental investigation. Grillage analyses of the prototype structure and test specimens were developed to work out appropriate loading for the specimens, to analyze the load distribution in the structures, and to develop predicted responses for the test specimens. The design of the first test specimen was governed by geometrical constraints based on the necessary depth to provide adequate anchorage length for the column longitudinal reinforcement. The second test specimen was designed to optimize the efficiency of the superstructure by using mechanical anchorage for the column longitudinal reinforcement, allowing the use of a shallower cap beam and lighter girder sections. Both test specimens exhibited satisfactory seismic performance by developing plastic hinges in the columns and successfully retaining strength under inelastic deformations.
Author: Robert K. Dowell
Publisher:
ISBN:
Category :
Languages : en
Pages : 336
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Author: U. S. Department Transportation
Publisher: CreateSpace
ISBN: 9781484198179
Category :
Languages : en
Pages : 168
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Book Description
This report presents the results of a pilot study on the seismic behavior and response of steel bridges with integral abutments. Analytical investigations were conducted on computational models of steel bridges with integral abutments to determine their seismic behavior as a system and to develop seismic design guidelines. The effect of the superstructure flexibility due to inadequate embedment length was investigated using 3D finite element models. This flexibility, modeled as translational and rotational springs, proved to have significant effect on the overall bridge dynamic characteristics in terms of periods and critical mode shapes. Lateral and longitudinal load paths and the seismic response were investigated using modal pushover and nonlinear time history analyses. A limited investigation on the effect of skew was conducted on a single-span integral abutment bridge. A procedure for incorporating the system level damping due to the yielding and inelastic responses of various components was proposed for use in the seismic analysis. Based on the analytical investigations and available experimental research, guidelines for the seismic analysis and design of integral abutment bridges were developed.
Author: Kosalram Krishnan
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 560
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Book Description
Author: Laura N. Lowes
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 180
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Book Description
A series of experimental tests investigating the seismic response of reinforced concrete beam-column T-joints was recently completed at the University of California, Berkeley. The evaluated connection was representative of an interior beam- column joint from a multi-column bridge frame built in the late 1950's. Three one-third scale models, representing the as-built connection and two retrofit connections, were tested. The results of this research project are an improved understanding of the seismic behavior of lightly reinforced bridge T-joints as well as verification of a design procedure for retrofitting this type of connection.
