Seismic performance design criteria for bridge bent plastic hinge regions - Final Report
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|Title:||Seismic performance design criteria for bridge bent plastic hinge regions.|
|Alternative Title:||Research project work plan for seismic performance design criteria for existing bridge bent plastic hinge regions.|
Murtuz, A. K. M. Golam, author.
Dusicka, Peter, author.
Schumacher, Thomas, author.
Portland State University, issuing body.
Portland State University Department of Civil and Environmental Engineering,, issuing body.
Oregon Department of Transportation. Research Section,, sponsoring body.
Oregon Department of Transportation. Research Unit,, sponsoring body.
United States Federal Highway Administration,, sponsoring body.
|Type of Resource:||text|
|Publisher:||Portland State University,|
|Place of Publication:||[Portland, Oregon] :|
|Extent:||1 online resource (volumes) : color illustrations|
|Abstract/Description:||The main objective of this research was to quantify the material strain limits for seismic assessment of existing sub-standard reinforced concrete bridge bents considering operational performance design criteria. Limited confidence exists in the current material strain limit state for operational performance criteria due to lack of experimental results considering the typical detailing of Oregon bridges and the cumulative damage effect resulting from an anticipated long-duration Cascadia Subduction Zone (CSZ) event. Component details for bridge bents such as geometry and reinforcing details were determined through a statistical analysis of available bridge drawings built prior to 1990 in the State of Oregon. Three full-scale bridge bent column-footing subassembly specimens were constructed and subjected to reverse cyclic lateral deformations utilizing a traditional loading protocol and a protocol representing the demands expected from a CSZ earthquake. The tests were designed so that variable axial loading could be applied in order to simulate the secondary effects experienced in a column that is part of a multi-column bent during an earthquake event. Material strains along with global and local deformation quantities were measured with a suite of external and internal sensors mounted to and embedded in the specimens. Despite having sub-standard seismic detailing, all three specimens exhibited ductile behavior under reverse cyclic lateral loading, achieving a minimum displacement ductility of 8.0. The obtained results also suggest that the material strain limits currently used for the seismic evaluation of existing bridges in Oregon considering operational performance criteria are conservative, but may still require further experimental validation. Finally, strain limits based on previous research at Portland State University (PSU) were compiled and combined with the results from this study to propose recommended strain limit values.|
Title from PDF title page (viewed on January 22, 2021).
"FHWA-OR-RD-21-04"--Technical report documentation page.
"PROJECT SPR 802."
Covers OCLC #1232247811 and OCLC #974499045.
This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.
Includes bibliographical references.
Sponsored by Oregon Dept. of Transportation Research Section and Federal Highway Admin.
Mode of access: Internet from the Oregon Government Publications Collection.
Text in English.
Concrete bridges -- Oregon -- Foundations and piers -- Design and construction -- Evaluation
Concrete bridges -- Earthquake effects -- Oregon -- Evaluation
Concrete bridges -- Oregon -- Foundations and piers -- Design and construction -- Evaluation -- Planning
Concrete bridges -- Earthquake effects -- Oregon -- Evaluation -- Planning
|Held by:||Oregon State Library|
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